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MPP 1kw solar inverter & 860 watt panels question plus other newbie questions?

Johnnys

New Member
Joined
Jan 17, 2022
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So I have been watching many videos on will and bought an MPPT 1kw 12v all in one solar inverter, 4 3.2v 280ah life 4 PO4 cells from Ali express, an vnsznr bms 4s 100a from Amazon and I got 4 Nature power 215 watt Monocrystalline panels each at 25 VOC so that would equal in total to 860 watts and a 100 VOC

So my question is I don’t think my MPPT solar inverter can handle the panels. I see in the specs can only handle 500w input and my panels create more that I think? Correct me if I’m wrong? I think I made the stupid assumption that the 1kw was how many watts I could get from solar anyways but looking closely looks like that not the case.

If that is the case I will have to sell this and get one that can handle the solar input of my panels. I was looking in either a 24v or 48 volt? Which you think it would be better for me guys? Or I could use the current MPPT inverter I got?

Also will I need more batteries for a 24v system? Or I can use the batteries I already have? I think it’s only 12v since it 4

Also is my bms I got good or I need a different one if I decide to move to a bigger system?

Sorry for the newbie questions

Thanks
 

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. I see in the specs can only handle 500w input and my panels create more that I think
12.8V at the 40A spec is 512W SCC output. So yes.
You should confirm that it can handle 150V input with your proposed 100VOC

Having said that your 800W of panels will be advantageous on cloudy days and earlier/later in the day. You will not achieve full harvest of your panels in the hours around noon, but it will work. Overpaneling is generally a good strategy.

If that is the case I will have to sell this and get one that can handle the solar input of my panels. I was looking in either a 24v or 48 volt? Which you think it would be better for me guys?
Everything including battery cells would need to change. If the AIO max input panel voltage is 100VDC your panels will be fine 2S2P.
Or I could use the current MPPT inverter I got?
No
Also will I need more batteries for a 24v system?
Yes
Or I can use the batteries I already have? I think it’s only 12v since it 4
Correct
Also is my bms I got good
No
or I need a different one if I decide to move
You will need a bms specific to your battery build
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What is your daily watt-hour needs?

If you need like 2kWh daily you probably need more battery headroom anyway imho. But if the battery bank is sufficient for your needs it seems like this unit and panels will do what you want. But this is just opinions- I didn’t do the math.
 
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