[kachurovskiy]

Did estimates for my roof months ago, 30k euro for a 10kW array with no storage, "pay-back" time 15 years. Why make a hundred holes in my roof if investing same amount in stock market will 4x in the same time period? Add leak and lightning risks, repairs and maintenance. I would do it for 10k but not for 30k. And of course you're not allowed to DIY it.

[detourdog]

Different scene in the USA he government incentives in USA and Massachusetts made it a great investment.

I have the same size array and I think it was $48K USD 8 years ago before tax credits. I have now sold more SRECs than the initial cost of the array. I also rarely receive an electric bill. Finally it was installed on a standing seam roof so no roof penatrations.

I haven't noticed any decrease in production and will expect that most of the cost of the original install to be on physical installation and when it comes to replace the equipment I can tell it will be cheaper and more performant then my existing system.

Planetary concerns exist but I feel that we are world full of manufacturing crimes and there is no reason to hold solar to higher standard. I also think that the decentralization that solar provide an efficiency that isn't obvious on it's face.

[pjc50]

Odd. I paid £5.5k for a 4kW array several years ago, I'd have assumed it was cheaper now. Possibly you hit a "breakpoint" where the non-unit cost got a lot bigger. Maybe permitting? I chose 4kW because that was the largest size that didn't require extra paperwork.

[simonjgreen]

I have just done a 10kW array for £9k. And I'm estimating payback in < 3 years. It has got cheaper :)