Solar generation in rain/cloudy conditions

wingnut771 said:
Just a simple timer can do that. Geyserwise is $$$.
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The sonoff POWR320D is perfect. Even better if you add tasmoto firmware and even better if you have a Home Assistant server to control it.
5Kw is plenty if your geyser is smart and you can control it based on load, battery SOC etc.

I have a 3KW and 4KW geyser on an 8KW inverter.
 
Lupus said:
Heatpump :-) a 3.5kw equivalent will use about 900w to heat the water and be done in an hour.
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Yeah, geyser off inverter regardless of HA or timers is not a good idea. You will be panicking everytime the rain or clouds show up and running a generator. Either get a HP or if funds limit, do a geyser controller. Mine has run with zero AC heating for the last 50 days now. I didnt trust it initially so would do 30 minutes off the inverter but I realised it wasnt necessary at all.
 
denmendez65 said:
He generates 20kWh. The idea with the geyser controller is he chucks only 3 big panels and the geyser will be heated by that. He keeps the 5kW for the house and no kwh usage from his available 20kWh for the geyser. Better resistance in cloudy conditions as the geyser controller will keep heating regardless of clouds or not.

He either way needs to put more panels as 20 wont be enough in my opinion. Geyser controller with panels and labor to install will be about 15k. 10k for the kit and 5k for installation.

I generate a daily average of 30kWh. 24kWh is just for the house. My house consumption killing the pool pump drops to 5kWh. So basically have 5x the generation I need. With the pool pump and all other non essential stuff running, I average 10kWh a day. I still have 14kWh to play with.
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I have full faith he can just use AC power. Add more panels to max out mppt.
 
B-1 said:
The sonoff POWR320D is perfect. Even better if you add tasmoto firmware and even better if you have a Home Assistant server to control it.
5Kw is plenty if your geyser is smart and you can control it based on load, battery SOC etc.

I have a 3KW and 4KW geyser on an 8KW inverter.
Click to expand...
You see, no heat pump this heat pump that.
 
Lupus said:
Heatpump :-) a 3.5kw equivalent will use about 900w to heat the water and be done in an hour.
Click to expand...

I still need to replace my geyser trough the insurance because its getting ready to burst so maybe I can get something like that and just pay the difference from what the insurance pays.
 
denmendez65 said:
Yeah, geyser off inverter regardless of HA or timers is not a good idea. You will be panicking everytime the rain or clouds show up and running a generator. Either get a HP or if funds limit, do a geyser controller. Mine has run with zero AC heating for the last 50 days now. I didnt trust it initially so would do 30 minutes off the inverter but I realised it wasnt necessary at all.
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2 geysers and very little grid:

L.png​

 
wingnut771 said:
I have full faith he can just use AC power. Add more panels to max out mppt.
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He will be guaranteed to be running that generator most of summer. Geyser on inverter is a nice trick when grid tied. Get a Heatpump or get a geyser controller. That inverter of his will max out around 5 to 6Kw of panels considering the 450Vdc max for the MPPT.

He will need a second one and additional panels to get to some 9kWp of panels along with another battery before starting to talk of going off-grid.
 
denmendez65 said:
He will be guaranteed to be running that generator most of summer. Geyser on inverter is a nice trick when grid tied. Get a Heatpump or get a geyser controller. That inverter of his will max out around 5 to 6Kw of panels considering the 450Vdc max for the MPPT.

He will need a second one and additional panels to get to some 9kWp of panels along with another battery before starting to talk of going off-grid.
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Get a second one then. Dont they support parallel? How much was it? R5k?
 
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