I have five Pylontech US5000 batteries, which I wish to charge as quickly as possible from three SmartSolar MPPT RS 450/100 units (with around 22kWp of PV), to make the most of short bursts of winter sun. The inverter is a Quattro 8000VA, so I am not going to discharge the batteries as quickly as I would like to charge them.
The maximum output from the 3 x SmartSolar MPPT RS 450/100 is 300A, but at the Pylontech recommended charge rate of 50A per battery the maximum charge rate would be 250A.
I thought that DVCC would make the best of what was available to charge the batteries and if I went over 250A the rest could be used by the inverter, if required.
I see from numerous other posts, like this and this that there are many factors which effect the actual charge rate of the batteries, including some people claiming Pylontech batteries may only charge at 25A, to preserve battery life. Victron themselves recommend here splitting into two stacks, using an extra set of long cables.
Can I split five batteries into unequal stacks? I could buy an extra US5000 and use two stacks of three, but there are long lead times on the US5000. I can get US3000C batteries, but would one stack of three US5000 and another stack of two US5000 mixed with one or more US3000C batteries be better balanced to receive more charge?
I didn't see this problem coming when I purchased the batteries earlier this year!
Any thoughts/advice appreciated,