Photovoltaic system: Costs, saving potential? - Experiences?

Besides, I still receive compensation from Senec for the feed-in that exceeds the annual free allowance.

Then take a look there, where the VAT remains that the grid operator pays to Senec. Because that must go to the tax office one way or another, and if you are the system operator, i.e. an entrepreneur, then it is your duty in case nothing reaches the tax office.

In one of Senec’s videos, it is basically explained that the euro payments are converted into kWh on receipt, so it doesn’t matter whether you receive VAT or not. They even specifically advertise that under regular taxation, more kWh are credited than actually delivered, since the transferred tax is counted among the incoming payments. I consider that very problematic.

As I said, that's not really my area, so I will definitely consult a tax advisor about it. But the employee from the tax office also said something about the fact that after 6 years I could give up this small business regulation again and then would no longer have to pay tax on own consumption and feed-in accordingly. But I notice we're drifting a bit off topic... maybe that would be more suitable for the tax forum :p

Yes, after 5 full years (therefore usually 6) one can switch back from the standard taxation. Consequence: No more VAT on own use, but no more VAT deduction on invoices for repairs, maintenance, spare parts.

Quick question: Where it is red, there is now a carport with a shed. On this flat roof, 9.24KW will be installed. Now the question of orientation. All towards SE or SE/NW?

For the info of all interested parties: 24 x TSM-385DE09.05 VERTEX S, hybrid inverter Kostal PLENTICORE plus 10, substructure, electrical installation, assembly, registration and commissioning for 10,830 gross

Thank you all!

Quick question: Where it is red, there is now a carport with a shed. A 9.24KW system will be installed on this flat roof. Now the question of orientation. Should everything face SE or SE/NW?


Thank you all!

Why everything facing SE? The house is to the east and therefore casts a shadow. So most likely everything facing SW.

However, on flat roofs, O/W is often chosen because it requires less mounting material and is less susceptible to wind.

Hello! I always read here that everything is unprofitable. But what about a new build, where you ask yourself: Gas heating+solar = €17,500 KfW grant Or air-water heat pump+photovoltaics+storage = €37,500 KfW grant (with in my offer €27,500 additional costs) So in the end, the entire surcharge from KfW55 to 40 plus €7.5k more... is that also profitable with storage?