jharrell
Solar Enthusiast
- Joined
- Aug 11, 2021
- Messages
- 298
Wouldn't believe that especially when similar OMRON models with more explicit specs show only 10 cycles at similar power.
The OMRON shows they have been tested up to 10 times at full load in their test protocol, so thats a minimum. They don't seem to publish a durability curve like they do for others and like Churod does.
Sol-Ark uses the physically larger 1000vac Churods not the 830vac. I think the EG4 18kpv uses the 830's, the new Gridboss uses 270 amp 1000 vac's which are the same physical size as the Sol-Ark 200's
These relays should not be normally cycling under full load, the typical is grid down then disconnect so no amps.
Does Sol-Ark use the relay as a circuit breaker in overcurrent conditions? I could not find this anywhere, someone reported the new gridboss doing this, opening relay if a single cycle over 200 amps occurred, not good, they fixed it firmware. Should be using the circuit breakers for that not the relay.
If it was switching under load (why?) it could try to do it a zero crossing to reduce current. How often is 200 amps going through these things vs 50 amps?
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