To increase power generation with a PrimeVOLT inverter, it is recommended to use the “overload” ratio 1.0 ~ 1.3 of the inverter nominal output power.
The maximum inverter “overload” ratio is 1.36.
It is also important to consider the system type for optimum configuration.
1) On tracker systems – ratio 1.0 ~ 1.1
2) Ground (good air flow) – ratio 1.0 ~ 1.2
3) Rooftop (air flow is bad, high temperature) – ratio 1.0 ~ 1.3
This is due to the fact that at a higher temperature, the output power of photovoltaic modules will be decreased.
The power coefficient of module is -0.44% / K (@ 25℃). If module temperature = 65℃, output power will decrease by 0.44 * (65-25) = 17.6%. 300 W panel will reduce its power to 300 * 82.4% = 247 watts.
Without voiding the manufacturer’s warranty, the open circuit voltage of the string modules should not exceed the maximum input voltage of the inverter under any case. (Temperature, irradiance…)