As a rule of thumb you should divide the connected capacity by 10 for 12 volt and by 20 for 24 volt. This also includes all the power losses in the cables, fuses and the inverter. Yeah, no DC-DC converter cheaper than a whole new inverter is going to handle any kind of start-up currents and is going to cause constant nuisance low voltage disconnects, IF it. . As a rule of thumb, the minimum required battery capacity for a 12-volt system is around 20 % of the inverter capacity. For 24-volt inverters, it is 10 %. The battery capacity for a 12-volt Mass Sine 12/1200, for instance, is 240 Ah, while a 24-volt Mass Sine 24/1500 inverter would require at least. . The difference between a 12V and 24V inverter is the amount of input volts it can handle. And a 24V inverter is. . Learning how to calculate inverter size for your needs can be a tricky task, especially if you're unfamiliar with how an inverter works or how much power you need to produce.
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