My hot water heater always runs on the solar. The only downside is if there are heavy clouds. If I notice this in the morning I will switch the timer off and try the next day since the tank has enough hot water for 2 days.
I have a few comments about using a hot water heater with 180 degree thermostat, a mechanical timer, and a mixing valve.
The things I have changed since originally hooking it up. I put scald guards on the showers so the kids don't accidentally get hurt if something goes wrong. I originally...
This has worked better than I could imagine. I get paid very little for the solar I push onto the grid, so this maximizes my solar power usage and benefits me, not the power company. The power bill stats told me that the hot water heater was 19% of my power bill, but the power bill went down...
I was looking at the sol-ark 12k, but I would need 2 of them and 14,000 is a little much for me.
I have a quote for 2 SUN-8K-SG01LP1-US/EU for around $4000 delivered I think service and warranty will be a hassell if needed
I have a quote for 2 Sunny Island 6048-US-10 inverters for around $4000...
I have ordered from Fred480v on ebay. The panels I purchased were 320 Watt Grade B. Every panel worked and produced 100% power. They were stacked and packaged properly too. Looks like he has some deals right now.
So here is my current hot water usage per day with the timer.
Here is what it was before doing the timer
Seems like my total power usage from the hot water heater has gone down a good bit
And just for fun here is total power usage overlapped with solar per day.