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portsample asked

Grid connected Multiplus-II using mppt charge controller

I think I am getting close with this system. It has six 200w 8.3A 24v panels, with three in series two in parallel producing 1.2KW. Currently this is what I am putting together for a grid connected system that stores power in batteries and feeds excess power back into the public grid.
Components are...
-two Multiplus-II 48/3000/35-50 120v
-Victron 250/70 SmartSolar charge controller
-Cerbo GX
-Lynx Power In
-Lynx Shunt VE.Can
-Lynx Distributor
-Victron VM-3P75CT energy meter
-Chins 48v LiFePO4 battery
-six Rich 200w 24v 8.3A solar panels
I am in the United States. Is this a reasonable system now that this Multiplus has UL approval? What am I missing? Anything I should change? What problems should I anticipate?

dual-multiplus-ii-dc-grid-connected-2024-01-01.pngThanks in advance, Happy New Year!

Multiplus-IIMPPT SmartSolargrid
dual-multiplus-ii-dc-grid-connected-2024-01-01.png (1.1 MiB)
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1 Answer
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rampage answered ·

The victron energy meter using can bus, not VE bus.

you do have and lot of inverter power compared to solar panels

The mmpt is way to heavy for for these few panels

Try an 100/25

Total voltage is calculated whit open voltage, power whit mmpt voltage and amperage.

Your battery is really limited. So also check max sustained amperage, you need about 150A at least. Better at least 200A

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