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Hi Bob, I have the Solax 5.8 batteries. The recommended spacing I think is just to give you more room to get to the terminals on each side. I put mine a bit closer at 175mm space between which is just enough to get to the terminals. I also have the BMS parrallel box II. Definitely the way to go...

I believe this is a combination of CT sensor accuracy and threshold set in the inverter which AFAIK is not adjustable. If they set the threshold too low CT errors (eg due to phase shift) could cause the inverter to misinterpret import for export or vice versa. Hence a common threshold is to set...

5 panels on two strings will not start up as quickly as 10 panels on one string. Optimisers should work ok on one string IMO. If there were no optimisers then two strings might be better grouping them by orientation.

As a Tesla owner for 8 years I think it's the right topology. High voltage equals lower current. 10kw charge/discharge at 50 volts would be 200 amps. Maybe one day a scrapped Tesla battery 100kwhr pack can be converted to run on HV inverters. High voltage transistors are reliable now.

Yes that's right it's 46 kwhr max, to get more you would need to parrallel inverters each with their own batteries. It seems to be a limitation of Solax HV batteries (maybe others?) that you cannot simply do series/parrallel arrangements. To do so would involve hugh charge/discharge currents on...

Yes the BMS parrallel box is solely for the Solax HV batteries, and yes the integral BMS management in the parrallel box does away with the need for the master triple power 5.8 battery. This unfortunately become redundant if you upgrade from 4 batteries to up to eight batteries when using the...

Yes the BMS parrallel box is the best way to go. I have one but am waiting for delivery of more slave batteries to do it justice. You can parralel two strings of up to four batteries giving 46kwhr total. Even if you don't need it initially it gives a better way to expand in future.

Good idea about the heated box! All EV's allow charging at sub zero temperatures but just limit the charge power. This is why the Solax charge is severely restricted at low temperatures. I can't believe though at the designed charge level it would damage the batteries. It's definitely something...

I have Solax HV triple power batteries, one thing they don't really highlight is the much reduced charge rate at low battery temperatures. So with a 15kw pk array I can get max 8kw on a cold December day, but the batteries (23kw string) can only take 2kw of this at the low temperatures...

They don't interact but each will have a different threshold dictated by the unit they serve. This makes it quite random which one will come on first. I designed the SolaControla and can adjust the threshold . I had to set it to over 500watts to stop it interacting. Unfortunately most other...

Sorry I was thinking 3 phase, Solax do 15kwatt 3 phase hybrids with dual MPPT. But you don't necessarily need a12.8kw capable inverter, 10 kw would work well if they do single phase ones, just lose a bit around midday in summer when you probable don't need that power. Inverters just throttle...

PS a better solution for east/west may be a single hybrid inverter with two MPPT input strings, but you are limited on how many batteries you can connect.

Two systems each with batteries, working independently, can interact badly. You get cross cycling, which I have observed, where one system discharged into the other charging that up, and vice versa alternately. The reason this can occur is the threshold for feed in are typically very similar, so...