Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2199
| Posted: 01:46am 18 May 2026 |
This might get confusing with a post in both Solar and Micro forums.
You likely know that Windy.com has a solar Power index map layer, I believe you can pull data, I normally know how we will go by looking at predicated cloud cover.
I have 11kW of panels running at the moment, most are Flat, some South and East facing, only 8 are facing north, in South-East QLD.
With my panel configuration I keep single panel shading effects to a minimum and the flat and south panels are very effective in overcast rainy weather, where slope and direction are meaningless.
There are 7 solar chargers, one for each 4 panel array, it's raining and completely overcast today, currently solar index indicates 130W/m2, each solar array and charger are producing exactly 3.7A, South, North, East and Flat.
7 x 3.7A = 25.9A @ 53.2v = 1.38kW.
The solar index level indicator is real time tracking with the movable readout flag over my location. It's cycling between 92W/m2 and 296W/m2. Power is dropping to 700W under darker cloud cover with heavy rain.
I have over twice the battery capacity you have, and with the rain yesterday we are down to 64% SOC (Full electric home and workshop) another day of no real solar and we will be down to around 34%, it looks like the following day (WED) will be brighter with some lighter cloud cover, that should easily get us back to around 70% SOC. We have not used Mains for over a year.
I assume you have LiFePO4 batteries and are in a Southern state.