Can I combine EasySolar 24/1600/40 all-in-one with one Victron LFPSmart 25,6/100 battery ?

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bouly123 asked Aug 6, '21

Can I combine EasySolar 24/1600/40 all-in-one with one Victron LFPSmart 25,6/100 battery ?

Hello, as a beginner I'm trying to design a simple system for off-grid use including:

- one EasySolar 24/1600/40 all-in-one Victron solution

- one LFPSmart 25,6/100 Victron battery with 25,6 V and 100Ah

- 4 x Sunpower Performance 375 Watts solar panels (Reference SPR-P3-375-BLK, each panel has Vmpp: 35.5 V, Impp: 10.57 A, Voc: 43 V, Isc: 11.26 A)

Would such a system make sense? Would I still need a BMS if I'm only using one battery ? Would I need to add anything else to such a system to make it work safely ?

Thanks for your help.

Lithium Battery EasySolar All-in-One offgrid

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Answer 1 · 2021-08-21T14:53:41Z

Alexandra answered · Aug 21, 2021 at 02:53 PM

@bouly123

The datasheet says the 25/100 can do 100A continuous a 1600va at 24v that is a 66/7A draw. The manual desribes more.

You absolutely need a bms for it - it is a requirement, as you will see there are choices.

The 2s 2p on your panels should be ok (need to verify with your min temps for your area) you can check with the mppt calculator.

DC fuses or breakers for the pv would also be something i would recommend. Get am mk3 to usb for programming with victron connect. Read all manuals carefully.

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Answer 2 · 2021-08-21T20:38:43Z

kevgermany answered · Aug 21, 2021 at 08:38 PM

The easysolar you're considering has three solar panel inputs, not four. So you need to connect the panels in two series pairs, which is what I think Alexandra means. I'm pretty sure you're going to have too much voltage for the solar charge controller in winter. Not sure if you're aware, but the panel voltage increades as temperature drops. Have just been going through the same calcs for the same easysolar. The solar controller is limited to 100V max. You could connect three of those panels in parallel safely.

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