4 kW 1-Phase System

4 kW solar kit for 2–3 person homes

The 4 kW solar kit is a very balanced option for typical apartments and small houses with 2–3 people. It delivers clearly more production than a 3 kW system while keeping the investment under control.

With this size you can comfortably cover day‑to‑day uses such as lighting, efficient appliances, home office and moderate air conditioning during sunny hours. It is meant for households that want strong savings without yet stepping up to 5 kW.

Why this system?

For monthly consumption in the range of roughly 140 to 373 kWh, the 4 kW kit is often an excellent match and makes better use of the available roof space than a smaller system. It suits young families or couples who spend a good portion of the day at home.

Compared with the 3 kW kit, this configuration provides more headroom to run washing machines, dishwashers or AC during the day without importing as much power from the grid. Compared with 5 kW, it keeps the upfront price lower while still delivering solid coverage.

As an on‑grid single‑phase system, installation is straightforward in most Spanish homes. Surplus energy can be compensated in your bill, further improving the economics of the project.

Estimated production and savings

The estimated annual production of the 4 kW solar kit is about 6,600 kWh, which can cover a very significant share of the electricity use of a 2–3 person household. Aligning major loads with solar hours helps maximise direct self‑consumption.

Using a reference electricity price of around €0.19/kWh including VAT, indicative yearly savings are about €749–1,278, with an expected payback period close to 2.8–4.7 years according to our internal figures.

Components included

The kit includes 8 Tensite 500W TOPCon N‑Type panels, adding up to 4 kW of peak power. These high‑efficiency modules are designed for residential installations in sunny climates.

The inverter is a Growatt MIN 4200TL-XH with 4.2 kW of power, configured for single‑phase on‑grid self‑consumption. It is optimised for this panel count and power range and offers monitoring of production.

Together with the generator and inverter, the kit comes with the mounting structure, wiring and basic protections with Enera Solar building, legalising and commissioning the system according to Spanish regulations.