In the course of planning our new building, I of course also dealt with the topic of photovoltaics. Thanks to the many contributions here in the forum (thanks for that!!), I came to the conclusion that I would rather invest the money in maximum photovoltaic area instead of in photovoltaics + storage. Since our roof only has a 22° pitch, I want to cover both the south and north sides. Unfortunately, the chimney sweep insists on a (north-facing) ladder, so three modules less can be installed here. There is still space for 67 modules or also 26.8 kWp. But since our budget is limited and the economic efficiency has a certain influence on our decision, I have decided to install the system myself with the help of two experienced friends. We can use the scaffolding, so no additional effort arises here. Conduit from the roof to the HAR is available.
I have now ordered the following components:
Solar module Jonsol JSM108-400-Fullblack 67 pcs.
Rated power: 400 Heat pump, tolerance: 0/+3%, MC4 connector
Cell type: 108 monocrystalline solar half-cells - black sorted
Frame color and foil: black
25 years product warranty
25 years linear performance warranty
KBE solar cable 1x6mm to 16mm
Burial capable and higher water resistance
SolarEdge Power Optimizer P850 34 pcs.
2 modules are connected to one optimizer
25 years product warranty
SolarEdge SE25K 1 pc.
AC rated power: 25,000W, transformerless, three-phase
12 years product warranty
GAK 1000-3R-X-C-PC-1.0 1 pc.
incl. DC surge protection type 2
SolarEdge Energy Meter 1 pc.
incl. 3x current transformers 70A
Mounting system Sunavi Systems
Multi for tiled roof incl. Marzari Blechziegel Grande 280
Modules standing, with system design according to DIN 1055
Commissioning and documentation 1 psch
Creation of documentation for registration and commissioning of the system with the responsible grid operator
All together €19,991.00 or also €745.93/kWp
To be fair, I have to say that the offer came through an acquaintance of a friend who installs large systems and naturally has good equity conditions. He still makes some profit from it.
This only to show that it is indeed possible to realize reasonable acquisition costs for a photovoltaic system. Of course, in this case, a considerable amount of own work is involved. But let's calculate 5k on top for two days of installation, then we are still well below 1k/kWp...