Letter: Clinton ducks climate issue
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Sir: I think Ani Harris could already "give back" surplus electricity from roof solar panels (letter, 23 June). Ensure the local and grid supplies are synchronised in frequency and phase, then provided your generation voltage is a bit higher than theirs, after connecting together the energy flow will be reversed, and the meter will run backwards.
However, I'm sure the suppliers would be very unhappy about any kind of amateur installation, given the obvious need to meet stringent safety requirements that would protect both your correspondent's system and the National Grid!
A much better, cheaper and simpler use of solar power is to supplement the domestic hot water supply, more especially if this uses an electric immersion heater as the main source.
Dr TIM DENNIS
Birch, Essex
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