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If you don't mind my asking, is the charge throughput what you expected? I'm talking about when your AC power is converted to DC (which has some loss), then the DC power is stored to the battery (again some loss), then that DC power is retrieved and used (again some loss).

For example, when Ford says the F-150 Lightning will get 2 miles per kWh, it's per kWH that it pulls from the battery, not per kWh in AC you drew from your house to convert to DC then store in the battery then pull out of the battery to drive with. My home solar system has a 96% round trip efficiency of pulling in DC power, storing it to batteries, pulling it back out of batteries when my house needs power, then converting it to AC for my house to use.