question

the-salmon avatar image
the-salmon asked

Off-grid system configuration Multiplus II + Pylontech battery

Hello folks!

I'm studying an Off-grid system to be installed in a mountain house, which will be mainly used during the weekends.

I'd like to ask you some advices on the equipment I selected:

Item Qty
MultiPlus II 3000VA 48V 2400W 1
2.4kWh 48V Pylontech US2000 Battery 1*
300W solar panels 4*
MPPT BlueSolar 150/35 1
Control Venus GX 1

* Qty may be expanded in the future

My questions is: will my system work? Is the selected equipment compatible?

Is there anything to correct / improve?

Thanks a lot! Any suggestion is welcome.

Matteo

Multiplus-IIMPPT ControllersPylontechVenus GX - VGXoffgrid
2 |3000

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3 Answers
ejrossouw avatar image
ejrossouw answered ·

@the_salmon The short answer is it should all work, but it may be worth consulting the below resources e.g. Pylontech recommends 2x batteries for your configuration. As for the panels, if you know exactly what you will be buying, run it through the configurator as there are many variables that apply such as temperatures etc. Take some time to make sure you get the details right and especially fuses etc. Not sure what loads you will be running off the inverter as that is typically what determines the size of your batteries. Don't forget lithium typically batteries don't charge at temperatures under 5 degrees or thereabouts,

Hope it helps.

https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom

https://www.victronenergy.com/solar-charge-controllers



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the-salmon avatar image
the-salmon answered ·

Thanks a lot @ejrossouw! I will definitely follow your suggestion to use the configurator, I didn't know that. Regarding the battery I already had a look to the link you pointed out, but I'm forecasting an average consumption of 1500 - 2000 Wh per day, only 2 days per week. Therefore I think the choice of 1 Pylontech US2000 Battery module should be OK, then I can upgrade it in the next years. What do you think about? Do you suggest other kind of batteries? Another question, do you see any drawback in choosing the MultiPlus II instead of MultiPlus I for my use case? Thanks :-)

4 comments
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Schalk van der Merwe avatar image
Schalk van der Merwe answered ·

Hi

I have a customer with a similar setup (all the same except for US3000) and it runs perfect!!

Note the discharge limit on Pylon US2000 is 25A/1200W, and US3000 is 37A/1776W (there is a 'max' value that is more as well as a 'peak', but i normally design my systems on 'recommend' value).

Make sure your requirement/load is less. As long as you keep these limitations of Pylon in check, it is a decent battery for a competitive price. Spending ZAR5000 more to upgrade to US3000 is definitely worth it.

11 comments
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