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I think a maximum of 20% degredation after 25 years is acceptable. That's 20% of each panel and not the total power of the system. I don't see the benefit of increasing capacity to 150% allow for degredation when it's each panel and not the system degredation

All the panels I looked at had the output guaranteed for 25 years with a minimum of 80% of original output guaranteed. Degradation was included in the forecast along with the fact payments are index linked If there were two houses in the same street for sale and one of them had solar panels...

Hi, I have recently had solar panels installed and the electrician has run the DC cables, which have 400+VDC running in them, down the external wall in 20mm conduit. They have drilled a hole in the back of the end box and run the cables through my cavity wall unprotected. They haven't used...

I've just had a 4kw system fitted with solar edge technology for £6200 with an iboost system (heats hot water using only free power) It's only been in for a month and my best day so far produced 30kwh. This should increase as we get nearer to summer. That works out at £4.50 generation tarrif...

They are surface mounted and protected coming down the wall. However, They then come out of the back of the end box through a cavity wall and are neither secured or protected Water will ingress into the end box and wall too because both are open to the elements. Surely they shouldn't just go...

Hi, I have recently had solar panels installed and the electrician has run the DC cables, which have 400+VDC running in them, down the external wall in 20mm conduit. They have drilled a hole in the back of the end box and run the cables through my cavity wall unprotected. They haven't used...