We use APC standby power units they offer smoothing and spike protection to equipment and up to an

hour off mains operation for supplied equipment if you need to run things for longer than the hour we

would advise you to get a generator and use the APC unit to provide smoothing between the generator

An alternative green option is to use Solar panels with a battery backup they offer longer cover if the mains goes off https://www.evergreenpoweruk.com/

and your equipment.  If you would like supply and installation drop us a line at info@phoneitict.com 

standby petrol generator