I used the MPPT calculator for a 3S2P configuration of 380W panels, and it calculates a MPPT 150/35.
The 35A of the MPPT seems a bit on the low side (6x380W=2280W /57.6=39,58A).
Also the solar system will be in Thailand, and i want the equipment as cool as possible.
Will there be a pro’s/cons if I buy a MPPT 150/45 so the SCC doesn’t have to work at its limit?
Hi whats the Isc of the panels? I think your calculation is off
But yes you can use a 150/45 instead of the 150/35
ISC = 11.47 at STC
Ok so 3S2P is max 11.47x2= about 23A
Not 39A
You can’t calculate wirh the max voltage, normally you’ll start charging at a much lower level and you’ll want maximum power.
So I’d take the 150/45
And ofc check the maximum panel voltage, shouldn’t exceed 45v
Panels JAM60S20-380MR
Voc=41.62
Vmp=34.77
Isc=11.47
Imp=10.93
3x 34.77=104V and 2x10.93=22A solar panels
but the charging voltage will be 57.6 volts and around 40A right?
Yes you are right, but thats only at max power
You can use a 35, but if you think your closer to max power all the time take the 45
The 23 is pv
The 39 is battery, but probably 45
Yes he was right about that, i was confused about his question!
I have very similiar panels in North QLD australia. I have 2 strings over 2 MPPTs.
40.8Vmpp x 9.56Imp x 7 = 2730W. String Vmpp theory should be 285V. It will depend on the panel’s performance. If you get budget ones you might not even get close when they heat up I have 390W Hyundai Shingled.
I have a 100A charger,
