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mfred68 avatar image
mfred68 asked

Do Victron make a hot water diverter?

Do victron make a diverter to heat my hor water with excess solar production after batteries are full, instead of feeding into the grid ? Or is there a compatible diverter that can do this? I currently have a diverter with my pv solar inverter, with a ct clamp, but after the water is heated the excess goe's to the grid, and if I set my victron system to feed to the grid, it drains the batteries after the water is hot to the grid. What I want is for excess victron solar to go to hot water, and then shut off draining the batteries after the water is hot. In other words, I dont want to feed into the grid as I'm not getting paid for it from my victron system but I do want hot water from the excess.

Hot Water Diversion
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6 Answers
sean avatar image
sean answered ·

Not a Victron product but it works seamlessly.

https://www.victronenergy.com/live/actor_ess

https://www.my-pv.com/en/products/ac-thor/



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mfred68 avatar image mfred68 commented ·
The ac Thore would be ideal if only it wasn't so expensive, but thanks for the advice.
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sean avatar image sean mfred68 commented ·
It isn't cheap I agree, but it does allow proportional control of any surplus, methods using relays and AC2 out will be simply on or off, which is rather crude.
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1234enough avatar image
1234enough answered ·

Depending on your system design, if AC2 out is not already being used. This could be used this to power dump loads and be controlled with relay Assistant/ battery SOC or battery voltage

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mfred68 avatar image
mfred68 answered ·

Ac2 is not connected, but I have created a problem for myself if I do want to connect it, it's because the inverter room is in my out building, 20 meters away from the consumer unit, and fed via a 25mm, 4 core SWA cable which is connected to the inverter grid in and ac1 out. To run an ac2 cable would be very disruptive.

I do however have a smart life app operated immersion heater switch (this also works with Google assistant) I'm wondering if I could get it to automatically switch the immersion heater on via some trickery settings on the cerbo gx, maybe triggered with the programable relay?

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nickdb avatar image nickdb ♦♦ commented ·
smart life is Tuya, I wrote an article on how to control this via node red on the cerbo.
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sharpener avatar image
sharpener answered ·

Usual solar diverters (myenergi etc) will work seamlessly with ESS provided their current transformer is in the right place, usually right on the grid connection. Then battery charging will have priority and PV water heating will only use power that would otherwise have been exported. You will need to configure it so the grid balance is set to export a small amount in order to trigger the diverter, 50 or 100W should be enough.

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phoenix avatar image
phoenix answered ·

If you are an electronic enthusiast I can recommend this diy diverter. Works well with ess

https://github.com/Jetblack31/MaxPV

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Rob Duthie avatar image
Rob Duthie answered ·

Or just use the assistant in VE configure and use it to drive a contactor relay.

If only Victron listern to that the spare relay #2 be used and have in the software that an option to use relay the other than a manual relay mode and temp control? Just like the genset setting for relay1 just rename it and call it diverter option?As i well known Swedish company has a inverter that has 2 relays and can be used for genset or diversion etc!!!!

Rob D

NZ

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