I bought one Big Blue 200w panel to connect to the ac70p. I really need more power and want to add another, exactly the same.
I got some answer on FB about maximum voltage. So in parallel the voltage does not change.
Connect in parallel?
Could you tell me if I can connect these specific models? Parallel or serial?
This is the EU version of the product.
It is advertised as taking up to 500 w panels, but the voltage seems to be an issue.
Thank-you!
Hi Janes,
welcome to the Bluetti community forum!
The max input is 500W as long you stay within this voltage range: 12V - 58V (max. 10A). Connecting in series adds more Voltage, connect in parallel adds current. When i got the right panel (Solarpowa 200) it already has a voc of 63,5V which is way too much for the MPPT of the AC70P.
In this case, you cant use the panels at all, not even one of them. You risk to burn your MPPT.
greetings
Erik
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My model is 28.8v. So 2x28.8 is just under 58. Since I have never seen even 100w output from these 200w panels, I’m wondering if I can just connect the two panels in serial to see how high the voltage actually goes, and disconnect if it gets near 50.
Are you sure @Janes ?
When searching the exact model, its shows this here:
In the case of 28,8V voc, a series connection would work, but its really close to the MPPT Limit. Normally you have about 5 - 10% buffer. Solarpanels on cold days with much sun tent to have higher voltages than on paper.
If you want to go more safe, you could go for a parallel connection too. Since while charging there arent the full 10A available all the time, this can cause some power losses.
greetings
Erik
yes I know, others have told me this, but it is really 28.8. I think the EU model.
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sorry for so many replies, but I am getting worried about the panel I bought. I see that both versions are on sale here, 63.5 and 28.6 and the latter offered very cheaply. The specifications are really quite different, I don’t see how it can be considered the same product, or whether the great views I read are applicable to mine.
Well basicly there are more than one way to get that 200W. You can go with high voltage and low current or low voltage and high current. I assume that the manufactor change their internal cabling of the panel.
thanks. quite a big change. keeping my fingers crossed.
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