"Peter Parry" wrote in message
...
snip stuff

If you are heating your water by mains gas a single panel will save
you about £40 per year.

Ours has saved us far more than that. Far more.

And it;'s not just the little woman who enthuses about our system, I didn't
even make the initial decision.

Your assumptive dismissals discredit everything else you say - although some
of it might be true it's hard to pick out the good bits.