The subsidies tend to come back as payments for the electricity generated so the installed costs will be the same as in the article. I installed a 16 panel, 4 k

The subsidies tend to come back as payments for the electricity generated so the installed costs will be the same as in the article. I installed a 16 panel, 4 kW system on my roof in 2012 for around £10,000 - and receive a subsidy of around £0.45 per kWh generated.