Is it sensible to retrofit a solar system on an old roof?

hello everyone!
I have a question whether it is advisable to install a solar system on an old house afterwards? The house is from the year 83. Does anyone know anything?

...We want to power our geothermal heat pump with electricity.

A good combination, although self-consumption only works or makes sense indirectly.

best regards

What do you mean by "indirect," you can operate the heat pump with photovoltaic electricity?! At least, that's what the photovoltaic system manufacturer told us.

hello everyone! i have a question, whether it is advisable to install a solar system on an old house afterwards? the house is from the year 83. does anyone know anything?

It is very important that the roof is suitable for such a solar system, regarding the condition of the roof. I would visit your trusted roofer and discuss everything with him. Some solar companies also already have their own roofers in their worker portfolio.

Hello Jenny, I think you mean installing a solar system for electricity generation. Have someone calculate how long the payback period is until the system has paid for itself and how long it is actually functional. If the roof is stable enough to last over time, then go ahead and install it.