I have roofs, some of them are on the south. I was wondering if there is a way to save money with solar panel. My undestanding so far is that solar panels are not magic and you can make (some) money if you use your production yourself a lot, because when you sell energy it is for a low price (something like 60% of what you pay for the extra electricity you need).
You will be able to claim it as a deductible expense from a tax perspective, you might even get subventions, and I assume you can maybe get a bigger mortgage. All those advantages don’t seem to make a real difference in my case.
I looked at alternative ways.
Group E offers My Sun Contracting https://www.groupe-e.ch/fr/energie/solaire/clients-prives/photovoltaique-my-sun-contracting. They build the solar panels on your roof with their money. You buy the electricity it produces at a low price, but you don’t get cents for the extra electricity it produces. That basically means savings without risk nor investment at the cost of time/meeting and the loss of the possibility to add your own panels on the roof. I won’t sell my buildings so no problem on that side.
Romande energie offers to invest in one of their big solar projects https://jardinsolaire.ch/projet if you’re a customer, and you pay your electricity at a cheaper price (the time doesn’t matter ) but it looks more expensive because of the network fees (that you don’t pay with your own panels or Groupe E’s panels) and obviously only up to the ammount of solar pannel you invest in. According to their estimation, in 25 years you only save 4.1% of your investment in TOTAL, so it is equivalent to an average savings account (0.2%). Should you use less than what you invested in, you will get the extra cents.
As I was writing this, I realised you can actually use the 2 solutions. For the electricity you use during the sunny days, you get relatively good savings with Sun Contracting, and then for 95% of the electricity you use at night (I assume it make sense to be sure you don’t over-invest) you get the cheapest night electricity. The use of Romande Energie solution doesn’t look more attractive in that case, but that would be the only solution to transform your night consumption into a “savings account” after you max out good savings accounts.
So basically, it seems that the best thing to do is to wait that either the next solar panel generation gets cheaper and/or more efficient or that the subventions gets higher. At that point it will probably make sense to add my own panels. Do you have experience with solar panel ? Did I miss something ? Is the research so slow that it would make sense to have my Sun Contracting for the next 25 years ?