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Helle all, I will have to instal a 120KWp with 120KWh batteries (BSLBatt lifepo4). I think about 9 x Multiplus II 48/15000 for distribution, 9 MPPT 250/100 foe each Multiplus and 3 x 25 SMA tripower on AC coupling. Would you have any feedback for compatibility with SMA ? Any example of similar installation ?
Thanks, all the best.
Thierry
How do you do this:
I think about 9 x Multiplus II 48/15000 for distribution,
Only the models up to 5000VA models can run in parallel. If you wanto to build a 3-ohase system with 135kVA/108kW, then you have to use Quatros.
9 MPPT 250/100 foe each Multiplus
Maybe you should consider the RS 45/200 because with 9 smalk 100A MPPTs you can run into a balancing problem.
120KWh batteries (BSLBatt lifepo4)
I would say, your batteries are a little bit too small fot the Solarpanels (if you have 120kWp, you should have at least 360kWh of batteries, – 1:3 rule) and I am not sure, your LiFePO4 battries will be happy with a charging current of 2400A and nine 15000VA inverter can produce a cintinious load if 2800A and a peak load of 5600A, However, with this load, the voltage will sink in and the Ampers increase, hence you have to calculate with 3200-6400A.
I plan currently fir a customer an installation with 12 Quatro Inverter and have fight with the Power Rails, the placement of 8 battery sets if 200kWh each, the cable sizes and lenghts. Also the fuses needed (e.G. NH3)
