I have a string of five 540 watt panel 13amps can i use just #1 mppt input
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November 21, 2024 3:20 pm
8 Replies
November 21, 2024 3:26 pm
In general, it appears so. Would you have the spec sheets or a pic of the name plate?
JB
November 21, 2024 7:32 pm
What are the VOC and ISC specs of the panel, and which inverter would they be connected to?
November 21, 2024 11:26 pm
Probably. I have two strings of 6 similar panels (Longi 535W, 13.8A and a max Voc of just under 50V). I have them connected to Mppt 1 and 2 on my 18Kpv.
November 22, 2024 3:19 pm
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November 22, 2024 3:26 pm
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That is nice. I would give it 2 thumbs up if I could. 
November 22, 2024 6:28 pm
@joel-brodeur The reason I’m asking is because when the summer comes, we’re gonna put the other five panels on the MPPT. two I did the calculations and those are fine. I was just wanted to make sure that I could use the first set and it would still work the same so I don’t have to rewire everything when I put the other five panels in.
November 22, 2024 6:32 pm
@thomacus If the calculations show that it will run on a single MPPT, you can definitely run just one MPPT and then add later on the other MPPT. I have a neighbor doing the exact same thing. Wasn't able to get the mounts for the second set installed before weather hit. His system is running great on a single MPPT.
Just curious, which inverter are your using?
JB
November 22, 2024 8:59 pm
