The most important thing to do before purchasing a generator, get a qualified electrician to perform a load test. A load test will get the required kVA rating, allowing for correct sizing first time round.
What do you need to operate during a power blackout?
- Air Conditioners and Fridges for example require twice as much power to start up than when they run, and therefore a larger generator is required.
- To prolong the life of the generator and decrease maintenance costs a generator should not run at more than 80% load for prolonged periods.
Generally running the whole business / home is not cost effective, make a list of what you consider essential during a power outage.