question

rob-burg avatar image
rob-burg asked

Which MPPT solar charge controller for 10kWp Solar PV and system experience

Can anyone advise if this Solar PV + Battery system is possible and also which MPPT solar charge controller/s should be used with it? It would be in grid parallel topology and in the UK. I've included photos below with the technical data for the inverter, panels and batteries, along with the topology diagram.


  • VICTRON ENERGY MULTIPLUS-II 48V 10000VA 140A 100A – PMP483105000 Inverter
  • 26x 390W Q Cells ML Mono Q Peak Duo G9 Black Frame Panels (10.14kWp)
  • 4x Pylontech US5000 4.8kWh batteries

If you have any advice or experience of a similar system, I'd be interested to know your thoughts. thanks


system-layout.png


victron-inverter.png


q-cells-390w-panel.png


pylontech-us5000.png

MPPT Controllerssystem design
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2 Answers
rikhf avatar image
rikhf answered ·

I would say put 2 strings of 5 panels in parallel on a 250/70. Do that 2 times so now you have 6 panels left. You could make 2 strings of 3 and parallel them on a 150/45. But more combinations are possible. This is how I should do it.

Edit: By the way, maybe you should reconsider the pylontechs. Almost all other LiFePO4 batteries are 16s so you can never combine the Pylons with these aother 16s configs if you want to expand.

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nickdb avatar image
nickdb answered ·

For a larger system like this an RS450/200 with its 4 trackers should do the job for you.

The mppt sizing tool on the main site is a good place to crunch the numbers.

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