if lighting is your main power use then led lighting would be more cost effective than solar.

if the heaters are old and inefficient and/or building not insulated highly enough you may not pass the EPC needed to qualify for full rate solar tariff .

nothing is straight forward


there are plenty of energy efficiency measures out there but which ones to implement and in which order.

If you get LED lights you may reduce your consumption to a level were solar will not be cost effective etc etc.

fit sky lights = reduce your lighting bill but loose the roof insulation required to qualify for solar epc also this reduces the roof space available for panels



just install biomass and if your not burning enough to earn a decent tarrif, crank up the thermostat. employ female staff in bikinis .  At work
At home

"I can't always believe facts I read on the web" - Charles Dickens

winner by default of the tractor vs caravan race