BradCagle
Solar Enthusiast
- Joined
- Aug 27, 2021
- Messages
- 577
What you guys think about using this attached over/under voltage relay connected between charger controller and battery, that command an ssr installed between pv and charger? If the charger goes caput and let pv voltage goes past it, this overvoltage relay senses it and close the circuit of the ssr that close the connection from the pv. No more tension past the ssr. Hope it make sense (I have a 48v system but there is also for 12 and 24)
I think that will work.
I'm not sure I'm a fan of the SSR over a Contactor w/economizer.
My thoughts are voltage drop of 1-1.6v across SSR. 1v drop @ 30a = 30w even worse 1.6v drop @ = 48w.
The contactor with economizer is a constant 1.7w