-Type of solar panel: Mono MSP 100W ( price :1.000.000- 1.150.000 Vietnamese dong). Working temperature of Mono MSP 100W Solar cell layer (photovoltaic cell). These cells are made from pure monocrystalline silicon. In these cells, the silicon has a single continuous crystal lattice structure with almost no defects or impurities. The main advantage of monocrystalline cells is their high efficiency, which is typically around 15%. Mono MSP 100W which have working temperature from -40oC ~ +85oC and have temperature coeffients are -0.5075%/ oC for power , -0.3659%/ oC for voltage and 0.0559%/ oC for current .This means that for every one degree Celsius above 25°C, the maximum efficiency of a Mono MSP 100W solar panel will decrease by 0.5075%/ Conversely, for every one degree Celsius below 25, the maximum efficiency of that solar panel will increase by 0.5075%/ Normalized Isc, Voc and Pmax (%) Temperature dependence of Isc, Voc and Pmax 120 105 90 75 60 Power 45 Voltage 30 Current 15 0 -25 0 25 Cell temperature °C 50 75