What system size fits my usage?
A good solar system is not the largest possible one — it matches real household use and the roof. Undersizing saves little; oversizing, especially under gross metering, is wasted capex if surplus is bought cheaply.
The figures below are planning ranges, not an offer. Final size comes from a site survey and meter data.
Start with annual consumption
Read yearly kWh from your bill. If a heat pump or EV is coming, add that load: a heat pump often +3000–6000 kWh/year, home charging +2000–4000 kWh/year.
- 3500 kWh/year — typically 3–3.5 kWp
- 5000 kWh/year — 4.5–5 kWp
- 8000 kWh/year — 7–8 kWp, often with a hybrid inverter and storage
What does one kilowatt produce in Hungary?
On an unshaded south roof at 30–35° tilt, 1 kWp yields about 1050–1200 kWh a year. East–west is slightly lower but flatter through the day.
Shade on a string can pull the whole chain down. Optimisers, microinverters or a better module layout beat “just add more panels”.
Gross metering: do not overbuild
New household connections typically export under gross metering: a kWh sent to the grid is worth less than one bought from the utility. Size for self-consumption, not maximum export.
If the house is empty by day and loads peak at night, size storage together with the array. The estimator on the contact page is a first pass; bills and roof photos make the real design.
- Collect the last 12 months of kWh
- Note planned heat pump / EV use
- Photograph the roof and the meter
- Ask for a survey — we lock kWp to that