A 4kW solar panel system costs around £9,500 to buy and install. If you want to include a battery in the installation, this will add around £2,000 to the price, for an overall cost of £11,500.
A 4000-watt solar panel kit is a comprehensive package that includes everything you need to harness the power of the sun. Let’s take a closer look at its essential components: Solar panels: The heart of the kit, solar panels convert sunlight into electricity.
Panels from a Korean company come at fairly comfortable prices around $0.7-$0.8 per watt. This means that a 340W panel can cost around $250. As always, Chinese competitors, like LONGi, Trina or JA Solar, offer cheaper products. At the same time there are enough brands with much higher prices: Panasonic, REC, LG.
Buy the lowest cost 500 kW solar kit priced from $1.05 per watt with the latest, most powerful solar panels, i nverters and mounting. For home or business, save 30% with a solar tax credit. Sunwatts has a big selection of affordable 500 kW PV systems for sale.
If you have a 400W panel, it will produce 400 watt-hours in standard test conditions, which includes a cell temperature of 25°C and solar irradiance of 1,000W per m², and is how every company checks a solar panel’s capabilities. If you have 10 of these 400W panels, you'll have a 4kW system, which produces 4,000kWh per year under these conditions.
A 4kW solar panel system has a peak power rating of four kilowatts, meaning it would produce 4,000 kilowatt-hours (kWh) of electricity per year in standard test conditions. You can build a 4kW system by purchasing solar panels with peak output ratings that add up to 4,000 watts (W).