"Ian Stirling" wrote in message
...
Batterys are an issue.
They last at best 5 years.

If you insist on maintaining everything, you're probably looking at
around 400W for 4h, that's 800Wh, or some 300Ah at 12V.

Maybe 40-80 quid a year for battery replacement.

Not sure I want to maintain everything. But certainly the 'essentials'. I
could live with £40 a year in batteries though.

Any thoughts on the best products to use ?