RogerD
New Member
- Joined
- Sep 26, 2019
- Messages
- 105
I found a good deal on 200w panels. $606 for 4.
Specs
I've heard you want your PV voltage to be at least 20v over your battery bank voltage.
With the above panels if I do 2s2p that's only 40.8v. Is this not OK?
If I put them all in series, I'll obviously be well over. However, the Voc will be 98.8.
I was looking at using Victron 100/30 controller, but I keep seeing posts that you want to keep the Voc quite a bit below what the controller is actually rated for.
Why?
What Voc is acceptable for 100v controller?
I'm looking at some other 200w panels and the Voc would be 90.8 (4 in series) and 87.44 (2s2p -24v panels) are these too high as well?
I could just get the Victron 150/35 it's only $36 more. So no big deal.
I'm just curious why a controller that is rated for 100V, it seems everyone thinks you should stay quite a bit below it.
Specs
- Maximum Power Voltage(Vmp): 20.4V
- Maximum Power Current(Imp): 9.80A
- Open Circuit Voltage(Voc): 24.3V
- Short Circuit Current(Isc): 10.2A
I've heard you want your PV voltage to be at least 20v over your battery bank voltage.
With the above panels if I do 2s2p that's only 40.8v. Is this not OK?
If I put them all in series, I'll obviously be well over. However, the Voc will be 98.8.
I was looking at using Victron 100/30 controller, but I keep seeing posts that you want to keep the Voc quite a bit below what the controller is actually rated for.
Why?
What Voc is acceptable for 100v controller?
I'm looking at some other 200w panels and the Voc would be 90.8 (4 in series) and 87.44 (2s2p -24v panels) are these too high as well?
I could just get the Victron 150/35 it's only $36 more. So no big deal.
I'm just curious why a controller that is rated for 100V, it seems everyone thinks you should stay quite a bit below it.