Tailors What if don't know what our average power usage is for the "Daily electricity usage (minus off-peak EV charging)" section, how would I find this out please?
You should be able to have an idea from the Growatt Shinephone app and see what your consumption is each day. Just a rough estimate will work. Most medium households hover around the 10-15kWh or so. Roughly. Also depends on time of year ofcourse.
Tailors For this section"Solar panel details" what if we have panels on the East & West facing roof, do I select South facing as that also gets sunlight all day?
Just combine the East/West output let's say 3+3 = 6kW, and reduce by 1kW or so and specify 5kW pv for South facing. Should get you close enough to a daily estimate. You can then slighly tweak as you see the estimates come in. Though be aware this is a rough indicator.
