Report No :
226003 -3
Issue Date :
Page 1 of 32
Manufacturer :
Luminous Power Technologies Pvt. Ltd
KHASRA NO. 8, INDUSTRIAL AREA, PHASE -3, VILLAGE- RAM NAGAR, P.O- GAGRET,
AMB, DIST.- UNA, HIMACHAL PRADESH
Test Item :
Storage Lead-Acid Batteries for Solar Photovoltaic Applications (Vented (Flooded) Type
Lead Acid Battery)
Identification :
Lead Model: ILTT 12250L
Series Model: ASTT 12250L
Receipt No. :
Date :
Testing Laboratory :
Test Specification :
IS 16270:2023
Test Result :
Other Aspects :
Serial No. : Nil
This report consists of 32 pages.
226003 -3
Report No :
Issue Date :
Page 2 of 32
TEST REPORT
IS 16270:2023
Secondary Cells and Batteries for Solar Photovoltaic Application“General Requirements and Methods of Test”
Report Number :
Date of Issue :
Total Pages :
32
Manufacturer :
Address :
Luminous Power Technologies Pvt. Ltd
KHASRA NO. 8, INDUSTRIAL AREA, PHASE -3, VILLAGE- RAM NAGAR, P.O- GAGRET,
AMB, DIST.- UNA, HIMACHAL PRADESH
Test Specification :
Standard :
IS 16270:2023
Test procedure :
Compliance Report
Non standard test method :
N/A
Test Report Form No. :
BIS_BSPV_16270_V1.0
Test Report Form(s) Originator :
BIS
Master TRF :
17/05/2023
Test Item description :
Storage Lead-Acid Batteries for Solar Photovoltaic Applications (Vented (Flooded) Type Lead Acid Batt
Trade Mark :
Manufacturer :
See copy of marking plate
Luminous Power Technologies Pvt. Ltd
Model/Type reference :
Ratings :
Lead Model: ILTT 12250L
Series Model: ASTT 12250L
See copy of marking plate at page no. 4 of 32
Other Documents submitted :
Please refer to Table – List of Attachments at Page No. 6
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 3 of 32
Group: Cells and Batteries
TEST SUMMARY:
Description
Measurement/ testing
Page No.
General condition
Condition of use(Cl. No. 4)
8-12
General requirements
Mechanical endurance (Cl. No. 5.1)
13
General requirements
Charge efficiency (Cl. No. 5.2)
14
General requirements
Deep discharge protection (Cl. No. 5.3)
15
Marking requirements
Marking (Cl. No. 5.4)
16
General requirements
Safety (Cl. No. 5.5)
17
General requirements
Documentation (Cl. No. 5.6)
18
Electrical performance
Functional characteristics (Cl. No. 6.0)
19
General conditions
General test conditions (Cl. No. 7.0)
20
Electrical performance
Capacity test (Cl. No. 8.1)
21
Electrical performance
Endurance test (Cl. No. 8.2)
22
Electrical performance
Charge retention test (Cl. No. 8.3)
23
Electrical performance
Cycle endurance in Photovoltaic
application(Extreme
conditions) (Cl. No. 8.4)
24-26
Electrical performance
Electrical performance
Sulphation Test (Applicable to
lead acid batteries only)
(Cl. No. 8.5)
Water loss Test (Valid for flooded
lead acid batteries only)
(Cl. No. 8.6)
Type tests (Cl. No. 9.1)
Electrical performance
Acceptance test (Cl. No. 9.2)
Electrical performance
Certificate: It is certified that the above tests were performed and found to be passing/Failing in the
requirement tested.
………………………………………………………….
(Approving Authority)
BIS_BSPV_16270_V1.0
27
28
29
30
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 4 of 32
Group: Cells and Batteries
Copy of marking plate(s):
MARKING PLATE OF LEAD MODEL
MARKING PLATE OF SERIES MODEL
Comment [P1]: Model no. is different from test
request please correct and send artwork so that we
can proceed further.
Comment [P2]: Dear sir, if we are changing
model no. different from test request then you have
to change test request, you can modification after
grant this model no.
Comment [P3]: Dear sir , please provide series
marking in soft.
BIS_BSPV_16270_V1.0
IS 16270:2023+A1:2025
Sec. Report No.: 226003
Dated:
ULR:
Discipline :Electrical
Page 5 of 32
Group: Cells and Batteries
TABLE 1
Sample and sequence of tests for Cells and or Batteries Lead Acid or Nickel or Lithium
SI. NO.
TYPE TEST
CLAUSE
1
Physical Verification
(verification of marking &
Dimensions)
5.4 & 7.2
2
Capacity Test @ C/10 Rate
8.1 & 7.2
3
Endurance Test
8.2 & 7.2
4
Charge Retention Test
8.3 & 7.2
5
Cyclic Endurance in
Photovoltaic application
8.4
6
Sulphation Test
8.5
7
Water loss Test
8.6
BIS_BSPV_16270_V1.0
1
2
3
4
5
6
7
8
IS 16270:2023+A1:2025
Sec. Report No.: 226003
ULR:
Discipline :Electrical
Dated:
Page 6 of 32
Group: Cells and Batteries
Table – List of Attachments
Attachment No.
Attachment Description
No. of pages in Attachment
Attachment – 1
Pictorial view of the equipment
32
General remarks:
The test results presented in this report relate only to the object tested.
This report shall not be reproduced, except in full, without the written approval of the Issuing testing laboratory.
Test item particulars ..................................................:
Classification of installation and use ........................: Terminal with nut & bolt
Connection to the mains ............................................: N/A
Possible test case verdicts:
- test case does not apply to the test object ................ :
N/A
- test object does meet the requirement ...................... :
P (Pass)
- test object does not meet the requirement ................ :
F (Fail)
Testing ......................................................................... :
Date of receipt of test item ........................................... :
Date(s) of performance of tests.................................... :
Laboratory conditions ............................................... :
Ambient Temperature................................................... : (20±5)°C
Ambient Humidity ......................................................... : <70%Rh
BIS_BSPV_16270_V1.0
IS 16270:2023+A1:2025
Sec. Report No.: 226003
Dated:
ULR:
Discipline :Electrical
Page 7 of 32
Group: Cells and Batteries
General product information:
1) Application details / Description of the product:
The product under test is “Storage Lead-Acid Batteries for Solar Photovoltaic Applications (Vented (Flooded) Type Lead
Acid Battery)” with six series cell connection.
Rating: 12V, 250Ah
Dimension:
Model
ILTT 12250L
Rating(Ah)
250
Length(mm)*
503
Width(mm)*
210
Height(mm)*
383
ASTT 12250L
250
503
210
383
*± 2mm in each case
Model No. tested with-in the family series: Lead Model: ILTT 12250L Series model: ASTT 12250L (Short term test)
Testing has been carried out on main model & series models.
2) Differences between the models: Model no. and brand.
Manufacturer declaration: Models have been manufactured with no change in grid alloy composition, grid purity, grid
thickness, ingredients used in the electrode preparation, method of preparation and thickness of the electrodes and quality
systems followed for manufacturing.
3) Options:
The equipment was tested without any optional accessory installed. Hence, this report does not cover parameters that are
influenced by the installation of optional accessory that might affect safety in the meaning of this standard.
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 8 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
4.0
Conditions Of Use
See below
P
This clause specifies the particulars operating conditions
experienced by secondary batteries in photovoltaic
applicants during their use.
Considered
P
4.1
Photovoltaic Energy System
The photovoltaic energy system with secondary
batteries referred to in this standard can supply a
constant, variable, or intermittent energy to the
connected equipment (lighting systems, communication
systems, etc.
See below
In compliance
P
P
4.2
Secondary Cells and Batteries
See below
P
Secondary cells and batteries mainly used in
photovoltaic energy systems are of the following types:
a) vented (flooded);
b) valve-regulated, including those with partial gas
recombination;
and
c) Gastight sealed.
The cells and batteries are normally delivered in filled
and charged or unfilled and uncharged.
a) discharged and drained (vented nickel cadmium
batteries only);
b) charged and filled;
c) dry charged and unfilled (vented lead-acid batteries
only); and
d) Discharged and filled (nickel-cadmium batteries only).
Vented (Flooded) type
P
Batteries delivered in filled and charged
P
For optimum service life, the battery manufacturer’s
instructions for initial charge of the battery shall be
followed.
Instructions manual provided
P
Other secondary cells and batteries such as based on
sodium or vanadium electrochemical systems can be
Potentially used for such an application.
No such type of battery
N/A
4.2.1
4.3
Due to the fact that they are in a phase of adaptation for
a possible use in PV systems, it is recommended that
their respective supplier be contacted for the
Necessary planning, test and operation details.
Material and Constructions
Verdict
P
See below
P
All the materials used in the manufacture of stationary
batteries for photovoltaic system shall be the best of
their respective kind, free from flows and defects and
shall conform to the relevant Indian standard, if any.
In compliance (see list of critical
components)
P
General operating condition
Batteries in a typical PV system operating under average
site weather conditions may be subjected to following
conditions:
See below
In compliance
P
P
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
4.3.1
4.3.2
Dated:
Page 9 of 32
Group: Cells and Batteries
Autonomy Time
See below
P
The battery is design to supply energy under
specified condition for a period of time, typically from
3 days to 15 days, with or without solar radiation.
Declared typical autonomy time is 6
days with the maximum consideration
of load
See below
P
The typical charge and discharge currents are the
following a) Maximum boost charge current: C/10A
b) Average float/trickle charge : C/50A
c) Average discharge current determined by the load:
C/120A
Considered
P
Depending on the system design, the charge and the
Discharge current may vary in a wider range.
Complies
P
Typical charge and Discharge currents
P
In some systems the load current must be supplied
at the same time as the battery charging current.
4.3.3
4.3.4
4.3.5
P
Daily cycle
See below
P
The battery is normally exposed to a daily cycle as
follows
Provided in manufacturer’s instructions
manual
P
a) Charge during daylight hours
As above
P
b) Discharging during night-time hours
As above
P
A typical daily usage results in a discharge between 2
percent
and 20 percent
Seasonal
cycle of the battery capacity
As above
P
See below
P
The battery may be exposed to a seasonal cycle of
state of charge. This arises from varying average
charging conditions as follows:
Provided in manufacturer’s
instructions manual
P
a) Period with low solar irradiation, for instance
during rainy season/monsoon season causing low
energy production. the state of charge can go down
to 20 percent of the rated capacity or less and
b) Period with high solar irradiation, for example in
during other seasons, this will bring the battery up to
the fully charged condition, with the possibility that
the battery could be overcharged
As above
P
Period of High state of charge
See below
P
During summer batteries will be operated at high
state of charge (SOC), typically between 80 to 100
percent of rated capacity
Provided in manufacturer’s
instructions manual
P
A voltage regulator system normally limits the
maximum battery voltage during the recharge period.
As above
P
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
4.3.6
4.3.7
Dated:
Page 10 of 32
Group: Cells and Batteries
When the generation voltage exceeds beyond the
limits, the controller should trip-off and reconnect
back as soon as the generation voltage comes to
normal range to avoid any delay in charge cycle.
As above
P
Charge controller should be sized accordingly to keep
the battery and load always safe and getting charged.
The system designer normally chooses the maximum
charge voltage of the battery as a compromise
allowing to recover to a maximum state of charge
(SOC) as early as possible in the seasons other than
the monsoon but without substantially Overcharging
the battery.
As above
P
As above
P
The overcharge increases the gas production
resulting in water consumption in vented cells.
In valve regulated lead acid cells the overcharge will
cause a lesser water consumption and gas emission
but more heat generation.
Typically the maximum charge voltage is 2.4V/cell for
lead- acid batteries and 1.55V per cell for vented
nickel-cadmium refer temperature specified by
manufacturers
As above
P
Vented type battery
N/A
Maximum charge voltage 2.4V/Cell for
lead- acid battery considered
P
Some regulators allow the battery voltage to exceed
these Values for a short period as an equalizing or
boost charge.
No such type of battery
N/A
For the other batteries, the battery manufacturers
shall give the most adapted charge voltage values.
Charge voltage compensation shall be used
according to the battery manufacturer instructions if
the battery operating temperature deviates
significantly from the reference temperature.
Used charge voltage
compensation according to the battery
manufacturer instructions
P
The expected life time of a battery in a PV system
even kept regularly at a high state of charge may be
considered less than the published life of the battery
used under continuous float charge.
Provided in manufacturer’s instructions
manual
P
Period for sustained low state of charge
See below
P
During periods of low solar radiation, the energy
produced by the photovoltaic array may not be
sufficient to fully recharge the battery. The state of
charge will then decrease and cycling will take place
at a low state of charge. The low solar irradiation on
the PV array may be a result of the geographical
location combined with the monsoon, snow periods,
heavy clouds, rains or accumulation of dust on
photovoltaic array.
Provided in manufacturer’s instructions
manual
P
Electrolyte Stratification
Electrolyte Stratification may occur in lead-acid
batteries
BIS_BSPV_16270_V1.0
P
See below
P
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 11 of 32
Group: Cells and Batteries
In vented lead-acid batteries electrolyte Stratification
can be avoided by electrolyte agitation/recirculation or
periodic overcharge whilst in service.
Considered
P
In Valve regulated lead-acid (VRLA) batteries,
electrolyte stratification can be avoided by design or
by operating them according to the manufacture
instructions.
Vented type battery
N/A
4.3.7.1
Specific gravity
Specific gravity of electrolyte for flooded lead acid
battery shall be 1.240±0.005. This is specific
requirement for cells/batteries for SPV application
and shall override all other requirements specified in
any other standard.
See below
In compliance
P
P
4.3.8
Storage
See below
Considered as below Temperature: 20°C to 50°C Humidity: < 95%
Storage: up to 12 months with
electrolyte and 1.5 year without
electrolyte
P
P
In compliance
P
Manufacturers’ recommendations for storage shall be
observed. In the absence of such information, the
storage period may be estimated according to the
climatic conditions as shown in Table 1 as below;
The exact limits of storage conditions are to be
Verified with the manufacturer.
Lead-acid or nickel-cadmium batteries with electrolyte
shall be stored starting from a state at full charge.
A loss of capacity may result from exposure of a
battery to high temperature and humidity during
storage.
The temperature of a battery stored in a shipping
container in direct sunlight, can rise to + 60 °C or
more in daytime. Choice of a shaded location or
cooling should avoid this risk.
4.3.9
4.3.10
P
Provided in manufacturer’s
instructions manual
P
Shaded location shall be used for
storage as per instruction manual
P
Operating Temperature
See below
P
The temperature range during operation experienced by
the battery at the site is an important factor for the
battery selection and the expected lifetime
Manufacturer’s recommendations for operating
temperatures and humidity shall be observed. In the
Absence of such information, operating temperatures
and humidity may be those shown in Table 2.
Provided in manufacturer’s
instructions manual
P
Complies
P
Charge control
Provided in manufacturer’s
instructions manual
As above
P
Vented type battery
N/A
Excessive overcharge does not increase the energy
stored in the battery. Instead, overcharge affects the
water consumption in vented batteries and
consequently the service interval
In addition, valve-regulated lead-acid batteries may dry
out resulting in a loss of capacity and / or overheating.
BIS_BSPV_16270_V1.0
P
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
4.3.11
Dated:
Page 12 of 32
Group: Cells and Batteries
Overcharge can be controlled by the use of proper
charge controllers. Most non-aqueous systems, such as
lithium-ion batteries and similar, will not accept any
overcharge without damage or safety problems. Such
batteries are normally supplied with a BMS (battery
management system) that prevents, independently from
its charge controller that such Overcharge happens.
No such type of battery
N/A
The parameters of the regulator shall take into account
the effects of the PV generator design, the load, the
temperature and the limiting values for the battery as
recommended by the manufacturer
Vented lead-acid or nickel-cadmium batteries including
those with partial gas recombination shall have
sufficient electrolyte to cover at least the period between
planned service visits. Overcharge in valve regulated
lead-acid batteries shall be carefully Controlled to be
able to reach the expected service life.
The water consumption is measured during the cycle
test and can be used together with the system’s design
information to estimate the electrolyte service intervals.
Provided in manufacturer’s
instructions manual
P
As above
P
As above
P
Physical Protection.
See below
P
Physical protection shall be provided against
consequences of adverse site conditions, for example,
against the effects of:
- uneven distribution and extremes of temperature;
- exposure to direct sun light (UV radiation);
- air-borne dust or sand;
- explosive atmospheres;
- flooding, water vapor condensation and water spray;
- earthquakes;
- shock and vibration (particularly during transport
Provided in manufacturer’s
instructions manual
P
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 13 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
5
General Requirements
In compliance
P
5.1
Mechanical Endurance
See below
P
Batteries for photovoltaic application shall be designed to
withstand mechanical stresses during normal
transportation and handling taking in account that PVES
installations may be accessed via unpaved roads and
installed by less qualified Personnel. Additional packing or
protection shall be used for off-road conditions.
Hardened container with provision of
handling used & additional package
provided
P
Particular care shall be taken while handling unpacked
batteries. Manufacturer’s instructions shall be observed.
Provided in manufacturer’s
instructions manual
P
In case of specific requirements regarding mechanical
stresses, such as earthquakes, shock and vibration,
these shall be individually specified or referred to the
relevant standard.
As above
P
BIS_BSPV_16270_V1.0
Verdict
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Cl. No.
Test / Requirement name
5.2
Charge efficiency
The charge efficiency is the ratio between the quantity
of electricity delivered during the discharge of a cell or
battery and the quantity of electricity necessary to
restore the initial state of charge under specified
conditions.
Where no data are available from the battery
manufacturer, the following efficiencies as given in Table
3 may be assumed.
BIS_BSPV_16270_V1.0
Dated:
Page 14 of 32
Group: Cells and Batteries
Test result/ observation
Verdict
P
>90% at 75% SOC
(As declared by manufacturer)
P
Data provided in manufacturer’s
instructions manual
N/A
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 15 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
5.3
Deep Discharge Protection
See below
Lead-acid batteries shall be protected against deep
discharge to avoid loss of capacity due to irreversible
sulphation. This could be achieved by using a system,
which monitors the battery voltage and automatically
disconnect the battery before it reaches its maximum
depth of discharge.
Verdict
P
P
Vented and partial gas recombination’s nickel-cadmium
batteries do not normally requires this type of
protections.
Lead acid battery
N/A
For the other types of batteries, the manufacturer’s
recommendations shall be followed.
Considered
P
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 16 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
5.4
Marking
See below
P
5.4.1
Cells or monobloc batteries shall follow the instructions of
the applicable standards defined in clause 7.2.
For clear identification of secondary cells and batteries
as per their chemistry (electrochemical storage
technology), marking of symbols shall be in
accordance with IEC 62902.
In compliance
P
Complied
P
5.4.2
BIS_BSPV_16270_V1.0
Verdict
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 17 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
Verdict
5.5
Safety
Applicable local regulations and the manufactures
instructions for procedure to be observed during
installation, commissioning, operation, taking out of
service and disposal shall be followed.
See below
Provided in manufacturer’s
instructions manual
P
P
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 18 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
5.6
Documentation:
See below
P
The manufacturer shall provide documentation for
transport, installation, commissioning, operation,
maintenance, decommissioning and disposal of such
cells and batteries for photovoltaic applications.
Provided in manufacturer’s
instructions manual
P
The manufacturer shall advise if there are special
considerations to be observed for the initial charging
of batteries when only the photovoltaic array is
available as the power source.
Provided in manufacturer’s
instructions manual
P
BIS_BSPV_16270_V1.0
Verdict
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 19 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
6.0
Functional characteristics
In compliance
P
The following parameters need to be tested for
qualification of cell/battery according to this standard
See below
P
a) Rated capacity
Refer to clause 8.1
P
b) Endurance
c) Charge retention
Refer to clause 8.2
Refer to clause 8.3
P
P
d) Cycling endurance in photovoltaic
application (extreme conditions)
e) Recovery from Suphation test
Refer to clause 8.4
P
Refer to clause 8.5
P
f) Water loss on float charge
Refer to clause 8.6
P
BIS_BSPV_16270_V1.0
Verdict
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 20 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
7.0
General Test conditions
See below
P
7.1
Accuracy of measuring instruments
In compliance
P
The accuracy of the measuring instruments shall be
in compliance with the relevant requirements of the
Applicable standards listed in 7.2.
The parameters and accuracy values shall be in
accordance with relevant clauses of the applicable
Standards listed in 7.2.
In compliance
P
As above
P
Standard to be Referred for testing
The test batteries shall be prepared according to the
procedures defined in the following standards or, in
their absence, according to the manufacturer’s
instructions:
See below
IS 13369: 1992+ A1: 2000+ A2: 2003+
A3: 2014 Considered for 12V vented
Type Lead Acid Battery.
P
P
7.2
BIS_BSPV_16270_V1.0
Verdict
IS 16270:2023+A1:2025
Sec. Report No.: 226003
Dated:
ULR:
Discipline :Electrical
Page 21 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
8.0
Test Method
See below
P
8.1
Capacity test
See below
P
Test batteries shall be selected, prepared, installed and
tested according to the applicable standards listed in 7.2
Capacity test conducted as per IS 13369:
1992+ A1: 2000+ A2: 2003+ A3: 2014
P
The verification of the rated capacity shall be performed
by using a current of I10 (A) for lead acid batteries, It /5
(A) for nickel-cadmium, Ni-MH and lithium batteries and
I10 (A) for other batteries according relevant clauses in
the Indian standards listed in 7.2.
I10 (A) current considered
P
The verification of long duration capacity shall be
performed by using a current of I120 (A) up to an end
voltage of 1.85 V/cell (for lead acid batteries) or 1.00
V/cell (for Ni-Cd and Ni-MH batteries). In case of long
duration capacity test, the discharge duration shall not be
less than 120 h. For other batteries the test shall be
performed considering the recommendation of
manufacturer for C120 rated capacity and the
corresponding end voltage.
Test performed by using current of I120 (A)
up to an end voltage of 1.85 V/cell
P
Requirement
See below
P
For batteries and cells, the capacity (excluding long
duration capacity) shall not exceed 120 percent of the
rated capacity
After the test maximum observed capacity as
below in table 8.1
P
8.1.1
Verdict
P
Table 8.1
Model no.
Battery(Ah) in %
1
2
3
4
5
6
Rated Ah
ILTT 12250L
105.5
104.6
105.4
105.8
105.4
105.7
250Ah
ASTT 12250L
104.3
103.9
105.0
107.2
104.3
105.8
250Ah
Supplementary information: The capacity is not exceeding 120% of rated capacity.
BIS_BSPV_16270_V1.0
IS 16270:2023+A1:2025
Sec. Report No.: 226003
ULR:
Discipline :Electrical
Dated:
Page 22 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
8.2
Endurance Test
See below
P
Test samples shall be tested according to the applicable
standards described in clause 7.2.
Minimum residual discharge time at
the final test discharge is given in table 8.2
P
As per the standards mentioned in 7.2.
See above
P
8.2.1
Verdict
P
Table 8.2
Model no.
ILTT 12250L
Battery
7
8
9 hours 32minutes
9 hours 18minutes
Supplementary information: The Minimum residual discharge time at the final test discharge is not less than 9h.
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 23 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
8.3
Charges Retention Test
See below
P
The test samples shall be tested according to the clauses, if
any, of the applicable standards listed in 7.2.
After the test Maximum loss of
capacity is given in table 8.3
P
As per the standards mentioned in 7.2.
As per IS 13369: 1992+ A1: 2000+
A2: 2003+ A3: 2014 Cl.No.11.6
P
Model no.
Battery
(Loss in %)
8.3.1
Verdict
P
Table 8.3
1
2
ILTT 12250L
7.29
6.59
ASTT 12250L
6.68
6.27
Supplementary information: The loss in capacity is not exceeding 10%.
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 24 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
8.4
Cycle Endurance in Photovoltaic Applications
(Extreme conditions)
General
See below
P
See below
P
In photovoltaic applications the battery will be exposed to
large number of shallow cycles but at different states of
charge. The test below is designed to simulate such
service under extreme conditions by submitting the
batteries at + 40 °C, to several aggregates of discharge/
charge cycles each comprising 50 cycles at low state of
charge (phase A) and 100 cycles at high state of charge
(phase B)
The cells or batteries shall therefore comply with the
requirements of the test below, which is a simulation of the
photovoltaic energy system operation:
Test performed at Phase A & Phase B
P
Considered
P
8.4.1
Verdict
a) the test battery shall be selected, prepared and
In compliance
installed according to the applicable standards listed in
(Test conducted at 40±3°C with
7.2;
battery open circuit voltage is ≥ 12 V)
b) the test shall be carried out with a battery composed of
such a number of cells that its open circuit voltage is ≥ 12 V;
c) the test battery shall meet or exceed the rated capacity
value when tested for capacity according to 8.1;
d) the test shall be started with the battery fully charged;
e) the test battery shall be brought to a temperature of +
40 °C ± 3 °C and stabilized at this temperature for 16 h;
and
f) the test battery shall be maintained at + 40 °C ± 3 °C
throughout the test phase A) and phase B).
P
8.4.2
Phase A:
Shallow Cycling at low state of charge (see Table 4)
See below
P
8.4.2.1
Lead-Acid batteries and other batteries:
a) Discharge the battery for 9 h with a current I10 (A);
b) Recharge for 3 h with a current 1.03 I10 (A); and c)
Discharge for 3 h with a current I10 (A).
Conditioned at low state of charge for
lead acid batteries
P
8.4.2.2
Nickel-Cadmium, NI-MH and lithium Batteries
a) Discharge the battery for 9 h with a current
0.1 It (A);
b) Recharge for 3 h with a current 0.103 It (A);and
c) Discharge for 3 h with a current 0.1 It (A). The steps b)
and c) shall be repeated 49 times
Vented (Flooded) type lead acid
battery
N/A
At the termination of the 49th execution of step c) the test
batteries, still at + 40 °C ± 3 °C, shall be fully
charged according to the manufacturers
recommendations and then cycling as specified for phase
B shall be continued.
Incompliance
P
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
Dated:
ULR:
Discipline :Electrical
Page 25 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
8.4.3
Phase B:
Shallow cycling at High State of Charge (see Table 5)
.
Lead-acid
batteries and other batteries
a) Discharge the battery for 2 h with a current 1.25 I10; and b)
Recharge for 6 h with a current I10 A until for lead-acid batteries
a voltage of 2.40 V/cell is reached, unless otherwise specified by
the manufacturer, and then continue charging at 2.40 V/cell until
a total charging time of 6 h is reached. For other batteries, the
charge voltage shall be limited to a safe level as specified by the
manufacturer.
See below
P
Test conducted at given
parameter and as per declared
by the manufacture
P
Nickel-Cadmium, Ni-MH and Lithium Batteries
a) Discharge the battery for 2 h with a current 0.125 It A; and
b) Recharge for 6 h with a current 0.1 It A until, for vented Ni-Cd
batteries, a voltage of 1.55 V/cell is reached unless otherwise
Specified by the manufacturer, then continue charging at 1.55
V/cell until a total charging time of 6 h is reached.
Vented (Flooded) type lead
acid battery
N/A
8.4.3.1
8.4.3.2
For Ni-MH and lithium batteries the charge voltage
shall be limited to a safe level as specified by the
Manufacturer. The steps i) and ii) shall be repeated 99 times.
At the termination of the 99th execution of step ii) the test battery
shall be submitted to a capacity test according to 8.4.4.
8.4.4
Verdict
N/A
In compliance
Residual Capacity Determination
P
P
a) At the conclusion of phase B, the battery shall be cooled down
under continued charge, to the temperature defined for a
capacity test in the applicable standards as listed in 7.2, and then
stabilized at this temperature for 16 h;
In compliance
P
b) The residual capacity test for lead acid and other batteries
shall be carried out with the I10 current to 1.80 V × n cells for
lead acid batteries and at the 0.2 It current to 1.00 V × n cells for
nickel- cadmium, and Ni-MH batteries. For lithium batteries and
other batteries, the end voltages are defined by the battery
manufacturer;
In compliance
(I10 current to 1.80 V × 6 cells)
P
c) At the completion of the residual capacity test, and if no
condition for test termination is encountered (see below), the
batteries shall be recharged according to the manufacturer's
specifications and a new set of phase A) cycles initiated; and
All condition for test termination
is complete
N/A
BIS_BSPV_16270_V1.0
IS 16270:2023+A1:2025
Sec. Report No.: 226003
Dated:
ULR:
Discipline :Electrical
Page 26 of 32
Group: Cells and Batteries
d) When the residual capacity is found in b) below 80 percent,
then the fully recharged batteries shall be submitted also to a
determination of the C120 capacity according to 8.1.
Residual capacity is not less
than 80%
N/A
Test termination:
8.4.5
P
The cycling endurance test in photovoltaic applications shall be
considered terminated when one of the conditions below is
fulfilled:
See below
P
a) When during the discharge c) of phase A, a battery with n cells
showed a voltage of n ×1.5 V/cell for lead acid batteries, n × 0.8
V/cell for nickel-cadmium or Ni-MH batteries or n × XYZ V/cell
that is the manufacturer's recommended minimum safe cell
voltage for lithium and other batteries;
Test is terminated after
showing voltage 9.0V
P
b) When during the residual capacity determination according to
8.4.4, the determined capacity was found lower than 80 percent
of the rated capacity; and
8.4.6
8.4.7
N/A
c) The cycling endurance in photovoltaic applications shall be
expressed in terms of completed aggregate phase A + B cycles
before a limit, as specified in a) or b) above, was encountered
together with the value of C120 capacity, expressed in per cent
of the rated one, as determined at the conclusion of the test.
In compliance
P
Water Consumption of Flooded Battery Types and Cells with
Partial Gas recombination. During the cycle endurance test,
vented type batteries may be topped up with water to the level
indicated and with a quality specified by the manufacturer. The
amount of water added shall be measured and reported.
Requirements
Maximum 480ml water added
during endurance test
P
In compliance
P
The minimum number of completed A + B phase cycle
sequences (150 cycles each) shall be not less than 3.
Test is finished after 3 cycle of
(A+B) sequence (150 Cycle
each)
P
P
Table 8.4
Model no.
Battery
3
ILTT 12250L
Residual capacity Residual capacity (Ah)
(Ah) after Phase
after Phase A+
A+ Phase B (cycle
Phase B (cycle 2)
1)
206.42Ah
205.03Ah
Supplementary information: Residual capacity greater than 80%
BIS_BSPV_16270_V1.0
4
Residual capacity (Ah)
after Phase A+ Phase B
(cycle 1)
Residual capacity (Ah)
after Phase A+ Phase B
(cycle 2)
206.14Ah
205.12Ah
Sec. Report No.: 226003
IS 16270:2023+A1:2025
Dated:
ULR:
Discipline :Electrical
Page 27 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
8.5
Sulphation test: (Applicable for lead Acid batteries only)
See below
P
The test is to be carried out on a fully charged
cell/battery. The test shall be carried out as described
in 8.5.1.
The test is carried out as described in 8.5.1
P
Test Method
See below
P
Considered
P
See below
P
After the test minimum discharge time is
given in table 8.5.1.1
P
8.5.1
a) Discharge at a rate of 0.0135xC10 for a period of 24 h.
b) Leave the battery for 120 h
c) Recharge of 0.056 x C10 for 4h followed by 0.0135
xC10 for 12h
d) Discharge at 120h rate (that is 0.0125 XC10 to an end
voltage of 1.9V/Cell)
Requirement
8.5.1.1
The batteries shall give at least 108 h.
Verdict
P
Table 8.5.1.1
Model no.
Battery
5
6
ILTT 12250L
108hr 59min.
108hr 45min.
ASTT 12250L
109hr 32min.
109hr 15min.
Supplementary information: The batteries discharge duration is not less than 108hrs.
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
Dated:
ULR:
Discipline :Electrical
Page 28 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
8.6
Water loss test (valid for flooded lead acid batteries only)
See below
P
The water loss test shall be done as per the latest
version of the relevant specification with all its
amendments mentioned in clause 7.2 of this
specification.
After the test maximum water is loss is
given below in table 8.6
P
Requirement
See below
P
As per the standards mentioned in 7.2.
Considered
P
8.6.1
Verdict
P
Table 8.6
Model no.
Battery
1
2
ILTT 12250L
16.27 gm/Ah/ battery
15.33 gm/Ah/ battery
ASTT 12250L
15.37 gm/Ah/ battery
14.41 gm/Ah/ battery
Supplementary information: The water loss is not exceeding 18gm/Ah/Battery.
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 29 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
9
Recommended use of tests
In compliance
P
9.1
Type Tests
See below
P
The following shall constitute the type tests:
See below
P
a) Verification of marking and dimensions (5.4 and 7.2)
In compliance
P
b) Rated capacity test (8.1);
Considered as type test
P
c) Endurance test
Considered as type test
P
d) Cycling endurance test in photovoltaic application
(extreme condition)
Considered as type test
P
d) Sulphation test (applicable for lead acid
batteries only)
Considered as type test
P
e) Water loss test (valid for flooded lead acid
cells/batteries only)
Considered as type test
P
The minimum number of samples shall be specified in
the relevant standards listed in 7.2
Considered
P
BIS_BSPV_16270_V1.0
Verdict
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Dated:
Page 30 of 32
Group: Cells and Batteries
Cl. No.
Test / Requirement name
Test result/ observation
Verdict
9.2
Acceptance Test
Considered as type test
N/A
9.2.1
Factory test
As above
N/A
The acceptance test shall be agreed between the
customer and the supplier. Compliance to marking,
labeling rated capacity may be verified.
As above
N/A
Commissioning test
As above
N/A
commissioning test is recommended to prove the
integrity of the installed battery system by means of a
capacity test at 10 hour rate for lead-acid batteries or 5
hour rate for Ni-Cd/Ni-MH and Li- ion batteries
As above
N/A
9.2.2
BIS_BSPV_16270_V1.0
IS 16270:2023+A1:2025
Sec. Report No.: 226003
Dated:
ULR:
Discipline :Electrical
Page 31 of 32
Group: Cells and Batteries
List of critical Components
Manufacturer/
Type/
trademark
Model
Technical Data
Standard
Marks of
1.
Conformity
Container
Manika Moulds Pvt.
LUM-C-114
Ltd.
Moulded PPCP
IS 1146 : 1981
IQC/Lab/P4/25/C2
Lid
Manika Moulds Pvt.
LUM-C-115
Ltd.
PPCP
IS 1146 : 1981
IQC/Lab/P4/25/L2
Separator
Daramic Battery
Separator India Pvt. LUM-C-116
Ltd.
Poly Ethylene
IS 6071 : 1986
IQC/Lab/P4/25/S3
Electrolyte
(Sulphuric Acid)
Gurinder Trading
Not Applicable Sulphuric acid
IS 266 : 1993
IQC/Lab/P4/25/A2
Water
In House
Not Applicable DM Water
IS 1069 : 1993
IQC/Lab/P4/25/D2
Object/
part No.
1.
P
Supplementary information: Evidences provided by the manufacturer for the listed components are verified by
us and the evidences are conforming to the requirements of the relevant standard.
BIS_BSPV_16270_V1.0
Sec. Report No.: 226003
IS 16270:2023+A1:2025
ULR:
Discipline :Electrical
Page 32 of 32
Group: Cells and Batteries
ATTACHMENT 1
PICTORIAL VIEW THE EQUIPMENT
SAMPLE TOP VIEW
SAMPLE FRONT VIEW
****END OF THE TEST REPORT****
BIS_BSPV_16270_V1.0
Dated: