High Voltage DC Switch Source for Solar
I need a high voltage DC rated switch for 3 series connected solar panels. The panel ratings are Voc 37.45V , Isc 8.7A, so I’ve been looking for a DC switch rated at 125V and 10A. If there is a simpl...
Forum Discussion
DrewE - Interesting DC disconnect switch and certainly a good price. I briefly read about their mechanical/hydraulic operated CBs. Maybe a latching solenoid which would have no draw if one was available...
Wiz - Yes arching is the issue with DC. I agree that a AC switch can be used but was surprised with the limited selection of DC rated switches for higher voltage at reasonable prices. In fact I have wired in a cheap 2 pole A/C disconnect switch for both of the panel wires but ideally would like a better quality switch. I'll be turning off the controller about 10 times/year for maintenance and for covered rig storage with no power and full battery disconnects.
atreis - I have a friend that uses one of these on 4 panels connected series/parallel about 60VDC. I suspect that switch is rated for 48VDC.
YC1 - Both actually. 3 series wired panels at over 100VDC and 8A+ connected to a MS MPPT 60 solar controller with 12V batteries. There is a remote possibility of adding another panel with series/parallel wiring for 70VDC at 17A. Due to the high voltage and lack of ground reference I'd also prefer a 2 pole switch.
The controller and related wiring is installed. Solar panels soon.
I did get some offline input from another poster which helped expand my search. And thanks to everyone.
Wiz - Yes arching is the issue with DC. I agree that a AC switch can be used but was surprised with the limited selection of DC rated switches for higher voltage at reasonable prices. In fact I have wired in a cheap 2 pole A/C disconnect switch for both of the panel wires but ideally would like a better quality switch. I'll be turning off the controller about 10 times/year for maintenance and for covered rig storage with no power and full battery disconnects.
atreis - I have a friend that uses one of these on 4 panels connected series/parallel about 60VDC. I suspect that switch is rated for 48VDC.
YC1 - Both actually. 3 series wired panels at over 100VDC and 8A+ connected to a MS MPPT 60 solar controller with 12V batteries. There is a remote possibility of adding another panel with series/parallel wiring for 70VDC at 17A. Due to the high voltage and lack of ground reference I'd also prefer a 2 pole switch.
The controller and related wiring is installed. Solar panels soon.
I did get some offline input from another poster which helped expand my search. And thanks to everyone.
