I look at some of the standardized solar output curves for the year at these latitudes that suggest solar output in the winter should be around a 20% of peak summer output. Simply don't believe them, even more so when you take into account parasitic losses like these.
I think the loss is about 5w when it is reading 0w. It’s not much. But dull days at this time of year are giving under 1kWh. In summer I get about 5-12kWh per day. I keep changing my system so it is difficult to compare months and I also don’t have an optimal presentation to the sun. You just have to do your best. I think the outcome for this will be to put both strings into one inverter for winter.
I look at some of the standardized solar output curves for the year at these latitudes that suggest solar output in the winter should be around a 20% of peak summer output. Simply don't believe them, even more so when you take into account parasitic losses like these.
I think the loss is about 5w when it is reading 0w. It’s not much. But dull days at this time of year are giving under 1kWh. In summer I get about 5-12kWh per day. I keep changing my system so it is difficult to compare months and I also don’t have an optimal presentation to the sun. You just have to do your best. I think the outcome for this will be to put both strings into one inverter for winter.
HuuHuuuummmm 🤔
Tricky old electric.