Key considerations when sizing off-grid solar systems
- Daily average energy consumption (kWh) – Summer and winter
- Peak load (kW) – The maximum power drawn from loads
- Average continuous load (kW)
- Solar exposure – Location, climate, orientation & shading
- Backup power options – During poor weather or shutdown
With the above considerations in mind, the key component of an off-grid power system is the main battery inverter-charger often referred to as a multi-mode inverter as they can usually operate in both off-grid or on-grid modes.
A solar professional should be able to put together what is known as a load table to help determine which type and size inverter is best suited to your individual needs. A detailed load table is also required to size the solar array, battery and backup generator.