"harry" wrote in message
...
Even without that technology, they'll come and top up on a regular
basis once your useage pattern has been established.

I don't know that the OP's tanks are for, but remember that standby generators
have no constant fuel usage pattern, expect whatever gas is used by periodic
exercising. Also, in the middle of a long general power failure, it is
somewhere between difficult and impossible to get a fuel delivery.

Vaughn