Cumulus heated with solar?

[PVresistif]

For xboxman
Photovoltaic heating is a bad choice because solar heating is free and much more efficient than a PV panel.
It's called south facing windows mainly, I did it at home and it's the best choice I made.
For the PV it is therefore ideally for hot water self-production.

[Bardal]

For xboxman
Photovoltaic heating is a bad choice because solar heating is free and much more efficient than a PV panel.
It's called south facing windows mainly, I did it at home and it's the best choice I made.
For the PV it is therefore ideally for hot water self-production.

The reasoning also applies to DHW heating: a thermal solar panel m2 will provide 600 or 700 W when PV will only supply 120 or 130. And thermal energy stores more easily than electrical energy ...

[xboxman4]

For xboxman
Photovoltaic heating is a bad choice because solar heating is free and much more efficient than a PV panel.
It's called south facing windows mainly, I did it at home and it's the best choice I made.
For the PV it is therefore ideally for hot water self-production.

This is only valid if we have a well oriented house, otherwise it is more difficult.

[xboxman4]

For xboxman
Photovoltaic heating is a bad choice because solar heating is free and much more efficient than a PV panel.
It's called south facing windows mainly, I did it at home and it's the best choice I made.
For the PV it is therefore ideally for hot water self-production.

The reasoning also applies to DHW heating: a thermal solar panel m2 will provide 600 or 700 W when PV will only supply 120 or 130. And thermal energy stores more easily than electrical energy ...

I agree. However there are other factors to consider: I have a town house, direct gas boiler without balloon. House misguided for roof panel (so only on the ground possible). Install a new water circuit + balloon + the place occupied ... This is no longer small jobs.
While electricity, you do not have the constraint of the transport, nor of problem of liquid leak, contrary of corrosion, freezing ... you recover your electric circuit.

[PVresistif]

for bardal
I agree that the thermal stores much better than the electric, but that is what I do with resistive PV since I store in the hot water tank the energy produced by the sun during the day; it is simple and cheap, no maintenance, no electronics, no risk of breakdowns. Of course you have to have an 2eme water heater tower electric network for days without sun
on the other hand a thermal sensor, it is more expensive to the investment (yes yes, I think) and especially in operation in winter, what galère if one is in a zone or freezes, for Africa it is very well but not for France outside the Mediterranean .....
Hello

[Bardal]

A thermal panel costs about 300 € / m2, so per kW installed; with a yield of 60% (easy to obtain), it will produce about 800 kWh per year; the ball will be a little more expensive than a classic cumulus. Or, in all, about 40cts per production capacity of 1 kWh per year.

A PV panel of the same peak power will cost about 2000 €, and will produce about 1200 kWh / year; about 1,6 € per production capacity of 1 kWh per year. It is 4 times more expensive.

The question of the gel is regulated with 1 can of antifreeze with some euro ...

[Forhorse]

, no maintenance, no electronics, no risk of breakdowns.

I do not believe it. Your claims are based on what?
How many photovoltaic water heaters according to your system are installed? Since when ? So what is the MTBF?

It has been calculated in another subject that the price of the installation is very close (a PV system is not significantly cheaper than a conventional thermal system) and as the PV panels have a lower efficiency than a conventional system thermal (all the more so when there is no electronics to operate at the MPP of PV ...) has equal power installed, PV panels occupy a much larger surface.

You can believe and defend your idea, but you should not tell anything ... and advance concrete figures with a real installation of installed power and performance comparable to what you want to compete (because produce a few liters of warm water vs. the hot water consumption of a family it does not allow to judge objectively the viability of the system)

[PVresistif]

Heating of the ECS with PV is without any maintenance other than the descaling of the resistance (which does not depend on the type of heating)
the law of OHM is unavoidable: a resistance this water heater connected to PV is 2 m stainless steel wire 8 / 10 ° 8 grams of stainless steel (less than one euro) and zero maintenance?
If we think about the investment in the PV for autocono there is only one conclusion: remove all electronics: 100% resistive, zero maintenance, zero risks and insurance to make money after 2 years of walking; my install works since 9 month, I think about the modification of the inclination to optimize the recovery but operation rating, not a resistance under 30V is all that is simpler to implement and cheaper. it is electric heating without the cost of elec ..............

[PVresistif]

See site dedicated to the PV on resistances but also to the performance of a water heater:
http://osenon.free.fr
http and not https! ! ! !

[PVresistif]

see this great new site with detailed explanations ...........
Night accumulation, electronic zero, zero maintenance, quiet for 25 years
After 25 years I replace the Silicon panel by a perovskyte panel that has a much higher performance and is much cheaper ..... Super, only pink for the future ......
Good reading
http://osenon.free.fr/4%20PV%20resistif ... sistif.htm