Could somebody with more expertise than me look at this please. Attached shows the specs for both the GivEnergy 3.6 and their 5kw inverters. I was thinking that although our array will only be 4kw, should I go for the 5kw inverter rather than the 3.6, in order to make better use of the battery after solar generation stops. But then I see this which suggests that no matter which of the inverters I went for, the maximum available on battery only is 3.6kw?