The number of batteries you can connect to an inverter cannot be more than 12 times the inverter charging current. A 20A charger can handle 240ah battery maximum. The formula is A x 12 = battery capacity (ah).
- Rule of Thumb: The inverter's rated power (kW) should align with the battery's capacity (kWh). - Oversizing the battery can lead to underutilization, while undersizing may limit performance.
When the inverter is unloaded -- that is, when no devices or appliances are drawing power from it -- it still draws some power from the DC source it's connected to. This is often referred to as "no-load power" or "idle power".
The best battery capacity for your inverter depends on your power needs, but 150Ah to 200Ah is ideal for most homes. Bigger isn't always better—efficiency matters.
PV1 current is 7amps PV2 is 3. 7 Similarly, (and assuming panels are all facing the same direction and there's no shading from trees or structures on the roof) the input with double the current indicates two strings in parallel on that input.
You need solar panels, inverters, racking equipment, and performance monitoring equipment to go solar. You also might want an energy storage system (aka solar battery), especially if you live in an area that doesn't have net metering.