Case Study of a 3rd Party
Rooftop-mounted Solar
Provider for a Philippine
Government Building
aProf. Ari Luis Halos
UPOU FMDS
Outline
● Philippines DOE Department Circular 2023-12-0035
● Preliminary Design of Roof mounted Solar Facility at
UPOU TLH
● Discounted Cash Flow Assumptions
● Initial Findings of Case Study on UPOU TLH
Philippines DOE
Department Circular
2023-12-0035
Objectives of DC 2023-12-35
a) Attain 35% RE share
by 2030 and 50% by
2040;
b) Attract investments in
RE thru innovative
business models
c) Empower End-Users
in using roof-mounted
RE systems
d) Decongest distribution
thru decentralization
e) Alternative compliance
mechanisms to EEC Act &
GEMP; and
f) Streamline processes
requirements of roofmounted solar projects
Business Models
Business Model
Power Buyer
Approvals
Supply Contingency
Roof owner
Excess - Distribution
Utility (DU)
City/Municipal Engineer
Distribution Utility
ERC
Lease to Generate
Distribution Utility
City/Municipal Engineer
Distribution Utility
ERC
Restricted Peer-toPeer
Roof owner
exclusively
City/Municipal Engineer
Distribution Utility (if grid tied)
ERC
Preliminary Design of
Roof mounted Solar
Facility at UPOU TLH
RSF for UPOU TLH
Design Parameters
● Current Power Supply
○ 3 phase 13.6kV from
Meralco step down to
230V AC via 3 x 37.5 kVA
transformers
○ 3 phase 125 kVA Backup
Genset
● Load
○ Offices
○ Mostly airconditioners,
computers & lighting
RSF Equipment
1. PV Modules:
a. Longi 580W LR572HTH-580M x 144 =
83.52 kW Inverters:
b. SolarEdge SE82.8KAU00IBNV4 x 2
c. Battery Bank: None
Discounted Cash Flow
Assumptions
DCF Assumptions
1. Values for i
a. Government = 10%
b. Private = 14.97%
2. Start operation = year 2
3. Service life = 20 years
4. UPOU absorbs all solar on workdays
5. DAED = 10% of projected RSF cost
6. RSF annual maintenance = $31/kW
7. 1% degradation per year
Initial Findings
Initial Findings
Business Model
UPOU
RSP
Supply
Contingency
P11.33/kWh
(Max)
6.334/kWh
(Min)
69.88MT/year ave
P86.47/sqm/year
(Min)
P332.03/sqm/year
73.55MT/year ave
P11.42/kWh
8.99/kWh
(Min)
Lease to Generate
(at P7.444/kWh)
Restricted Peerto-Peer
(Max)
CO2 Savings
(Max) (market rate
only P2-3.1/sqm/yr)
48.97 MT/yea ave
Initial Conclusions
1. Economically viable for government
facilities to engage 3rd party RSPs even
at minimal savings from DU rates
2. It makes sense for RSPs to supply to
government even at rates lower than that
of the DU
3. The lease to generate business model
may need to be elucidated further to
facilitate implementation
Thank you!
aProf. Ari Luis Halos
UPOU FMDS