Interesting report from Sheffield University

[SolarCity]

Second anniversary of green energy research reveals solar panels ?do what they say on the tin? - News releases - News - The University of Sheffield

 

[SpitfireW'sale]

This kind of report brings some welcome credibility and positive news to the industry. Shame they don't state what is wrong with the 2% of under performing systems - I would make a guess that they are due to error on installation, such as incorrect string wiring etc. rather than any fatal flaw with the equipment.

It's a good article to link to from installer web sites (assuming that would be agreeable with the University)

 

[FB.]

Shame they don't state what is wrong with the 2% of under performing systems

Perhaps they haven't asked.
Maybe they'll give the systems the benefit of the doubt for a little longer and then investigate those which are especially under-performing or out-performing.

In any case, 2% of systems below expectations is a very good outcome; it means that 98% are meeting or exceeding expectations.

I'll link to their solar data pages:
Welcome to the UK wide network of PV generators - Microgen Database.

My system is on there - user reference number 774, between Cambridge and Ely.

Their data, being from generation meter readings, is much more believable than the add-on devices supplying data to PVOutput.