“Too small risks closure; too big wastes money.” When it comes to solar panels, homeowners, stores, and factories all have to make the same choice. The old “+20%” recruitment used to work, but things have changed since then:
Microclimates: A terrace that faces north on the same street faces south.
Dynamic tariffs: Prices can go down (even below zero) in the middle of the day and in the evening.
Tech and policy: The efficiency of module and solar panel inverters continues to improve, and V2H and storage subsidies come in waves.
The dynamic 20% model is our answer. It’s still easy to remember, but it changes based on the season, load, and policy. You can also find LEGO-like solar array roof, inverter, and solar installation kits, home solar installation kits, solar panel kits, and storage. The result is solar power for homes or businesses that is always the right size, costs less per kWh, and can be scaled up when you want.
