Which is better?

10 x 455w 5s2p or 8 x 550w 4s2p

Thanks

15 minutes ago, Herbie. said:

Which is better?

10 x 455w 5s2p or 8 x 550w 4s2p

Thanks

Have to always ask, which inverter are you considering putting it on, and which make and model of panels are you talking about? The answer could be different depending on circumstances.

If roof-space is tight, go for the 550w

Got enough space

38 minutes ago, Herbie. said:

Got enough space

Without voltage and amp rating of the panel, and brand of inverter, it's impossible to say.

The inverter dictates the max voltage, and amp input. When all else is the same, go for 455 since it gives around 150w more.

Edit: seems you are using kodak og, so stick withing these params, since the panel specs are unknown to us.

MPPT Range @ Operating Voltage : 120 VDC ~ 380 VDC

Maximum PV Array Open Circuit Voltage : 500 VDC

MPPT Maximum Input Current : 18 A

Max IC : 18 A

Max lsc : 22 A

Edited March 7, 20251 yr by Pho3niX90

Okay, so your best bet with these panels and inverter, if it's a choice between just these options, and if it's the typical Voc=50V-odd, then take 8x550W, but connect them all in series, ie. 8s, not 4s2p.

It begs the question of whether you could do better with a different panel altogether, that has a higher Imp closer to 16-17A, so you could connect 5000W of panels more easily.

Right now the Voltage is your limiting factor in a series string, and the current if you're thinking to go parallel.

Edited March 7, 20251 yr by GreenFields

Thanks