In message , Stephen
writes
Tenant is happy with that as he does not need a garage.

The garage has a Sub consumer unit that has three MCBs, a 6A mcb for
the internal garage lights comprising of 7 off 8 watt CFLs, (3 in loft
space and four on ground floor)

another 6A MCB for outside floodlights and a 32A mcb for the garage
ring main.

The sub consumer unit is fed from the main house. The tenant has turned
off the power to the garage from within the house. Clearly the tenant
doe snot want to pay for the electricity that the landlord may consume
for4 lighting up the garage.

Both landlord and tenant are happy with the current arrangements.

However, the landlord would like to make provision for lighting only in
the garage with a independent power supply.



Surely if the landlord and tenant are as happy with everything as you
say then would it not be a lot simpler to arrange for cash compensation
for the use of the lights? Remove the 32A mcb if you are worried that
more serious power maybe used. From the landlords perspective it will
be the cheapest and easiest route.

Buy a meter and have that fitted, still cheaper than a generator and
transfer switch, if the happiness doesn't extend as far as total trust.

Batteries and generators will not be as cost effective as mains power.


--
Bill