automate power on/off of water heater

[Daddy Tanuki]

If this is a resistance heat water heater... consider moving to a heat pump style water heater. Uses 1/3 power for same BTU.

I was looking into HPWH's but they reportedly do not work well in cold climates. kinda negates the purpose as winter is when I really want a lot of hot water.

 

[kommando]

DIY build solution for 230v 50htz

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This is what I run to divert excess to a dedicated immersion heater element.

This is a Chinese version, do not have experience but should work

https://www.aliexpress.com/item/1005004829132599.html?spm=a2g0o.productlist.main.9.979dURP0URP0Pq&algo_pvid=ad88b1d5-59b7-440c-b9ba-ff82d4364ebc&algo_exp_id=ad88b1d5-59b7-440c-b9ba-ff82d4364ebc-4&pdp_npi=4%40dis%21GBP%21104.87%21104.87%21%21%21920.70%21920.70%21%402103867617131799172984001e2b6f%2112000030644160055%21sea%21UK%21226801%21&curPageLogUid=yq6lYq7gefhb&utparam-url=scene%3Asearch%7Cquery_from%3A

 

[time2roll]

I was looking into HPWH's but they reportedly do not work well in cold climates. kinda negates the purpose as winter is when I really want a lot of hot water.

82F today, 60s and 70s in the rest of the 10 day forecast in Belgrade, Serbia.
Does the WH sit outside in the snow?

 

[Daddy Tanuki]

82F today, 60s and 70s in the rest of the 10 day forecast in Belgrade, Serbia.
Does the WH sit outside in the snow?

I never bought one once I some of the issues were explained to me. the plan was to build a small shack to put it in but even then the cold air it puts out would make it fight itself if enclosed. i think they work fine in any place that does not dip below 40 on a regular basis

 

[yodamota]

interesting approach. how would you turn the relay on at specific battery voltage?

using victrons charge controllers programmable relay, my outback charge controller will also work via voltage as well.

 

[The Terrible Triplett]

Here is an idea ...

Solar water heater

So its still running. had to use all the hot water the other day at 12:00 o clock, by 17:30 the water was at 68 degrees. i have only used 30 units on my electrical bill this month. so a big middle finger for our eskom from my side!!

diysolarforum.com