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


2 Answers

John Swindells Profile
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.
thanked the writer.
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John Swindells
John Swindells commented
Solar PV attracts a better FiT (feed-in tariff) rate than wind, but wind is much cheaper (£ per installed kW) than solar. Both types of system have a realistic payback period, so your choice should really be determined by which one is more suitable for your property.
Ray Dart
Ray Dart commented
I'm by no means an expert on this but I have done a little research and the numbers I saw for wind turbines recently were very disappointing - I think you have to live in a fairly windy area, and at a reasonable altitude, with few other buildings nearby and have the appropriate size of wind turbine for it to make any sense at all.
John Swindells
John Swindells commented
How much wind you have is definitely a key factor in evaluating wind power! Micro wind turbines can be economical, but only with plenty of non-turbulent wind. Evaluating that effectively is easier said than done.
Amit Bajpayee Profile
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.

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