On Sep 20, 7:23*pm, "Dave Plowman (News)"
wrote:
In article
,
* *harry wrote:

Well, if you bought an underground tank of petrol and forget the
purchase price, that would provide free fuel too. Until it ran out.
Solar panels failing with time, exactly the same.
I don't have to fill a solar panel with increasingly expensive fuel,
it never "runs out." It is a one off cost.

It will runs out when it fails. As everything does.

The petrol tank can fail,they often do.
I can buy a new part cheaper than replacing a petrol tank.
And I don't need to buy dangerous petrol.