Geyser timer solution for solar

[Lupus]

So like this 3.6kw unit?

https://acdirect.co.za/product/its-domestic-heat-pump-for-geyser-3-6kw-wi-fi-enabled/?sfdr_ptcid=22117_617_752945867&sfdr_hash=4145b217809fa18398f991364fac473c&gad_source=1&gad_campaignid=21038251141&gbraid=0AAAAADCWsHvltehPlEc3G_0flOfza2uJv

That's going to get water to 60c, not 70, so apples for apples calcs should apply. 3h30 = 7kwh. So in an extreme situation, you're using R500 more per month. That unit installed is going to cost about R17k, so ROI in 3 years which is 1 year into their 'pro-rata' portion of warranty.

It won't take 3 hours to get it there and a 3.6kw heat pump uses 900w while it's running so even if it's 3 hours it'll be 2700w

 

[wingnut771]

A few people prefer it to be done by 11am. Also after 1pm you start getting diminishing results. So you'd need to ensure that what ever you use is not going to start using battery.

They need to can the solar geyser and add more panels in its place too. The thing is useless in winter.

 

[Lupus]

They need to can the solar geyser and add more panels in its place too. The thing is useless in winter.

Not up here less cloud cover

 

[wingnut771]

I used AI like you. It said 3h

2.7kwh

That’s like my 50% blunder.

 

[Lupus]

That’s like my 50% blunder.

Yup

 

[Lupus]

I used AI like you. It said 3h

2.7kwh

What did you have the COP as?

 

[isie]

Why do you need sun when you have a battery?

on 10kw of storage - if i need to have an early morning shower and water is not hot enough from the day before i do use it to warm up but only to 45C

 

[leon.davibe]

Madness

Mine is set to 50ºC for 2 people ... with more than enough hot water for another 2
I mix my water hot:cold / 20:80 ... the hot is just just there to break the cold

Legionairs disease ?
There is a reason why we run tanks that hot apart from not showering cold

 

[wingnut771]

Legionairs disease ?
There is a reason why we run tanks that hot apart from not showering cold

50c is the minimum for that afaik.

 

[leon.davibe]

50c is the minimum for that afaik.

I thought the min is 60

 

[Lupus]

Legionairs disease ?
There is a reason why we run tanks that hot apart from not showering cold

Legionnaires' disease in South Africa is a rare but severe pneumonia caused by Legionella bacteria, with 93 cases reported between 2018–2020. 65% of the cases were in Cape Town.
Seems like the chances of getting are almost as high as winning the lotto

 

[Dimpie (JIGSAW)]

Legionairs disease ?
There is a reason why we run tanks that hot apart from not showering cold

Well Im 55 yrs young ... when should I worry ?

 

[Lupus]

Well Im 55 yrs young ... when should I worry ?

Around the time you win the lotto

 

[Dimpie (JIGSAW)]

I actually think mine is set to 55ºC and the plumber said that's the goto for most people due to loadshedding.

 

[wingnut771]

 

[cavedog]

View attachment 1881801

So I'm killing bacteria instantly. Why people think that 70c is super crazy then?

 

[isie]

I meant with 2kW. Trying to save @cavedog buying an 8kW inverter.

on the week i tested i never got it to get to 50C running roughly between 10am to 2pm

 

[isie]

So I'm killing bacteria instantly. Why people think that 70c is super crazy then?

when you paying for electricity its over kill

 

[isie]

I thought the min is 60

50 is ok i think it just takes longer to kill the buggers

 

[wingnut771]

on the week i tested i never got it to get to 50C running roughly between 11 to 2pm

How do you know the temp it got to?