Clean the solar system yourself regularly?

Hello Strommann

Well, if the manufacturers say so, it must be true.
I don’t know any of our systems that are cleaned – and all deliver higher yields than forecasted.

As I wrote further above:
(1) with a module tilt of less than 25-30 degrees, I would check whether cleaning might be necessary. With more than 30 degrees, this is definitely not the case, except if
(2) the system is exposed to special dirt – e.g. a farm in the middle of the fields, or a coal power plant as a neighbor.

On the other hand, I should actually advise everyone to have their system cleaned – that supports regional craftsmen and secures some jobs in the solar industry – maybe one should also talk to Mr. Schäuble about whether the invoice for the cleaning can be tax-deductible as a donation for a good cause

Regards
Micha

maybe one should also talk to Mr. Schäuble about whether the invoice for the cleaning can be tax-deducted as a donation for a good cause

Mr. Schäuble has heard you.
The invoice should be deductible as a craftsman service.

Yes, but not as a donation