Quote:
Originally Posted by Daox
Have you monitored the heat of the SSR? Most of them require a heat sink if you're putting any decent power through it.
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True about the heatsink although I would think it,s more likely the inrush current when trying to short out 110v.
The photo of the blown SSR shows a minimum of 24v DC so it could well be oscillating because as soon as the SSR closes the voltage would be well below 24v DC and switch off again.
This constant switching with very high inrush and poor heatsink can't be good.
As the SSR is easily capable of switching the load of the water heater, could you not just switch of the heaters when the tank is at temp?