Photovoltaic Consultation: 45° Gable Roof North/South

Hello everyone,

I am a photovoltaic layperson and have a few general questions: The property has a north/south orientation and a hip roof with a 45° pitch. I tried using PVGIS and got 540kWh/kW peak for the north side and 1180kWh/kW peak for the south side. Is it normal to fully equip the north side under my conditions? Does it provide some base load in winter? It certainly depends on the additional costs for installing on the north side; I am currently looking for companies and will post the prices here. Battery storage probably makes sense at current prices; is there a magic threshold for the price €/kWh and how large should the battery be dimensioned?

Thanks for your help

Wouldn't east or west perhaps also be an alternative for [Walmdach]?

Hello,

how many degrees of roof pitch does the roof have? In summer, the north side also brings you yield, but in the darker season, when the sun no longer gets high enough, it probably brings little to nothing. Unfortunately, we also have a hipped roof, but all four sides are fully covered, because covering north any more was not cost-effective.

I don't know exactly what it's called, crippled hip roof? In any case, our east and west roof "start" higher up and therefore practically have no surface, maybe for 1-2 modules. But it would be better than nothing, thanks for the idea :) Unfortunately, the roof pitch is also very steep at 45°.

Economically, it will take a while for the two modules on the north side to pay off, but there are other reasons for photovoltaic systems. Keep in mind during planning that each orientation should ideally be connected to its own MPPT and that its operating range matches the voltage. This affects the choice of electronics and their calculation. That the north side might not be able to feed into the battery, since a separate inverter is needed for that, would not be a problem - the yield will hardly exceed the base load of the house.

Show us the roof. How large is the area on the south side? Is there any shade from the neighboring buildings or large trees?

In winter, there is zero yield in the north. You only do that if you have money to spare. It does not pay off.

Storage can definitely make sense. Do you also want to charge an electric car at home? Do you have a heat pump?