How much does a 4kw solar PV unit cost including installation in the UK?

John Swindells answered

There are lots of factors which will affect the cost of a solar PV installation, because of variations in roof construction and accessibility (if you're looking at a roof installation) and quality of the panels/inverter.

As a general guide, however, a 4kW system would cost in the region of £18K - £20K and should provide decent generation capability for 25 years or more.

Amit Bajpayee , Solar Sales and Service Manager, answered

An average household in the UK will usually need a 3kW or 4kW solar system installed to produce enough electricity to cover their total energy usage. So let's see what are equipment are required to set up 4 kWh Off Grid Rooftop solar PV System:

No. Of Panels - 16 Nos

Solar Inverter - 4 KW

Batteries - 8 Nos(150 Ah X 12 V)

Space Required - 28 Square Meter

Mounting Structure - GI channels

Capacity of the module - 250 kwp

Wires and Other Miscellaneous equipment.

Buying a solar panel in 2018 means you can save up to 70% on the cost of a solar panel purchased back in 2010. For example, a 4kW solar system in 2010 would have set you back a huge £15,000, but now only costs around £6,000.

How much does a 4kw solar PV unit cost including installation in the UK?

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