Let's start with some numbers, finally.
This is how much energy I used in my current home last year.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1416163;image)
Gas is for cooking , water and home heating. For all the rest electricity (bloody old and inefficient AC).
This is the water heaterBTU Input 40K/hour = 11.7228 KW or wasted energy (efficiency of this thing is laughable).
Let's focus on the energy needed to heat up the water (gas energy in summer time), I would say I need 6KWh/month. Let's say 10KWh/month just to have some room.
Now this is where I want to mount the hybrid PVs (picture taken at sunset):
![](https://www.eevblog.com/forum/renewable-energy/liquid-cooled-solar-panel-discussion/?action=dlattach;attach=1428742;image)
1) Is the current chimney for a retarded living room gas fire place we never use.
2) Is the magic wall facing 155°SE. Dimension 5.4x14.6 meter total.
Let's assume I have this sun average:
![](https://www.eevblog.com/forum/renewable-energy/liquid-cooled-solar-panel-discussion/?action=dlattach;attach=1428748;image)
here the crazy idea, convert the chimney in a water tank for heat storage.
How many hybrid PV panels surface I need to cover my 10KWh/month energy need for DHW [Domestic Hot Water]?
I want a good balance between summer an winter.
Sorry I am too tired to continue with the math, I will do the rest of my homework in the next days.
PS: Oh please correct me if I made some mistakes, some units conversions could be wrong.