Zwy
Emperor Of Solar
Did you read the links provided? Do you understand the following: why not harvest any potential yield and put it either in battery storage or a dump load?You over-panel in parallel, not in series.
So there's no danger of going over the max PV voltage ratings, you just over produce current on a typical sunny/summer day and then on a cloudy/winter day you meet your ratings.
I look at it this way, I size an array according to needed generation of potential yield to power loads and provide sufficient power to charge my storage. Any time there is potential for production, I want to harvest all of that yield. The argument made by members like yourself is due to not having enough storage for the energy harvested. I run 8.4Kw of PV, yet I manage to go 5 days with no sun running my house basically off grid. It is due to storage size, not the amount of PV. I harvest any potential yield at any time.
I think some of this myth came down from days of lead acid storage, where battery banks needed to be charged thru absorption on a regular basis (daily) in order to lengthen service life of the battery bank. LFP on the other hand prefers running in the middle and works perfectly not reaching full SOC daily. It does not matter if full charge is ever reached on a regular basis, one could go for months (we see some members reporting they finally reached full SOC since November) and not reach full SOC. Why would you overpanel if you have the storage available and all you need is another SCC to harvest any potential? The array cost the same whether you harvest part of the yield (clipping) or all of the yield.
Some of you just might catch on to the concept.