I’m looking at increasing my hot water capacity that my Eddi can produce.
I have a 3kw solar array, a Zappi charger and an Eddi connected to a hot water cylinder with single top 3kw immersion heater.
The zappi gets first dibs on any surplus solar and during May - August it will run my wife’s BMW i3 purely on free electricity. The Eddi will heat if the car is not plugged in or is fully charged and does a good job of providing a limited amount of hot water, meaning that by careful use we get around 6 months of not heating with our gas boiler.
My issue is that the immersion only heats the top of the tank so once it is hot any surplus solar goes back in the grid, I’m looking at different options to increase the capacity of stored hot water.
I like the look of the Mixergy tanks but they seem to be very expensive, if I had or was planning to install batteries this would be the way forward as I could get a cheap rate tariff and charge the batteries overnight and also the Mixergy when not enough solar. However without batteries I think my peak use would outweigh the savings.
I’ve looked at other cylinders and am wondering about a twin immersion cylinder so as to heat more water with the surplus. Would I be better with a slim cylinder so that I would be heating less in the top before the bottom immersion started?
Thanks.
I have a 3kw solar array, a Zappi charger and an Eddi connected to a hot water cylinder with single top 3kw immersion heater.
The zappi gets first dibs on any surplus solar and during May - August it will run my wife’s BMW i3 purely on free electricity. The Eddi will heat if the car is not plugged in or is fully charged and does a good job of providing a limited amount of hot water, meaning that by careful use we get around 6 months of not heating with our gas boiler.
My issue is that the immersion only heats the top of the tank so once it is hot any surplus solar goes back in the grid, I’m looking at different options to increase the capacity of stored hot water.
I like the look of the Mixergy tanks but they seem to be very expensive, if I had or was planning to install batteries this would be the way forward as I could get a cheap rate tariff and charge the batteries overnight and also the Mixergy when not enough solar. However without batteries I think my peak use would outweigh the savings.
I’ve looked at other cylinders and am wondering about a twin immersion cylinder so as to heat more water with the surplus. Would I be better with a slim cylinder so that I would be heating less in the top before the bottom immersion started?
Thanks.