I want to protect the Victron 100/20 SC from being burned out if or when the battery is disconnected, particularly when I leave the van for a period of time. I want to disconnect the battery but must disconnect the solar first, right? So a three pole switch which goes from both off to battery on to both on is needed - I guess. Does Amazon have that switch for a 100 amp 24v system? Which one?
What switch do I need?
- Thread starter OldJimbo
- Start date
Make sure the breaker can handle the DC voltage of your panel arrangement. Many DC breakers are only rated for 36V or 48V. If you have panels in series it could easily be well over those values.
Does the instantaneous switching off of both sides at once allow enough time for the CC to react?
Maybe more of a problem when switching back on?....may need more answers??
The 17v 100w panels are wired in 2s/2p configuration giving me 12a and 34v maximum. I’m not 100% sure if the double pole breaker is the best possible, but since some people skip it entirely it seems OK. Its sole function is break both positive and negative solar wires at the same time.
That's not a valid assessment. Adding a switch that can't handle the voltage and/or current is worse than no switch. Just make sure the switch is rated for 36VDC or more and can handle 15A or more.
I use a Blue Sea DPST battery disconnect switch. https://www.bluesea.com/products/6010/m-Series_Mini_Dual_Circuit_Battery_Switch_-_Red
Renogy panels with MorningStar, TriStar PWM. No problem on off many hundreds of times.
Renogy panels with MorningStar, TriStar PWM. No problem on off many hundreds of times.
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