will this work

[jay127]

Hi
I have a idea and i wonder if it is possible or not i have a worcester 28 i junior combi boiler and last year i had some pv panels fitted. What i want to know if i can do is if i get SolarImmersion: controller and put it on a electric water heater or a watertank with a immersion somehow bypass my boiler because it cannot accept water heat more than 25 degrees I was told by Worcester . can i heat the water in the electric water heater using my excess power from pv panels and have it pumping round my rads is this possible what size tank do u think I would need

 

[Ermintrude]

Look at a thermal store.

 

[Howsie]

Do you have a barn roof covered in panels because you'll never impart enough heat into a thermal store with one or two immersion elements.

I imagine you're better off installing a hot water cylinder or selling the electricity back to the grid and putting that money toward your gas bill.

 

[jay127]

Hi
thank you for your reply i have a 4kw array and I get paid for my export . I have been looking at the small electric water heaters say 35 litres also so it has not got so much water to heat so hopefully i'll keep on top of it. Don't know how much water is in the average central heating system. i'm not a plumber can you tell me what the difference is between thermal storage tank and just a normal tank they look the same to me lol
Jay

 

[Howsie]

Nice idea but no ROI IMHO.

 

[Ermintrude]

4kw? Good luck. Might be ok at say 18kw

 

[Killy Bing]

You need a far greater power input to make anything worth while imho.

look at revising your set up when you have a new boiler.
you could go for an unvented cylinder for the mains pressure water and a system boiler instead of a combi.

 

[jay127]

Hi thank you for your input just to make it clear i only want to do the heating not water dont no if this will change things

 

[jay127]

hi
sorry another thing i forgot to add is that only intend to use the water heater when my pv is producing and using some kind diversion valve so it goes back throw the boiler at night

 

[Howsie]

To be clear, it won't work. You will never get a return on investment to justify the outlay.

I'd be spending my money elsewhere.

 

[TBServices]

No good for ch, but you could prob pre-heat your incoming water supply, and fit a blending valve, for hot water

Prob wouldn't be worth it though