I'm currently looking into to do a complete rooftop PV installation where the PV panels also will act as roofing material. It is a one-side roof so the installation will be rather simple.
A complete roofing system would in my case entail a total power output of nearly 20 kWp. However, I do not wish to export this much to the grid. The system is simply oversized in order to ensure better self sufficiency during winter here in the northern climate.
Actually I would like to make a really simple installation using maximum 16 micro inverters and therefore never exceed 3,6 kWp delivered to the grid/house. One might argue that it is a waste of PV capacity but I don't see it this way. PV panels are decreasing in price and when also utilised as roofing material the price/m2 becomes realistic. A more traditional 5-6 kW system would be plenty during summer, but not nearly enough during winter. My main goal is to achieve near self sufficiency without relying on the ever changing feed-in tarifs and subsidies.
My question is therefore if someone is familiar with a setup of this sort? The main problem is to limit the production of the PV panels during summer in order to not overload the micro inverters.
One idea would be to use a form of PWM based controller right before the micro inverter in order to limit the current delivered to the micro inverter? Naturally it should last 25+ years like the panels and micro inverters.
The goal is to build a complete solution including the roofing solution, inverters and grid connected battery storage.