The default backup.
WHAT A GENERATOR DOES
Burns fuel to produce electricity.
WHAT TYPES EXIST
Petrol, for smaller units Diesel, for larger and continuous use Gas, where supply exists
WHAT PETROL SUITS
Light loads, intermittent use, low purchase cost.
WHAT IT COSTS
Higher fuel cost per unit, shorter life, more noise.
WHAT DIESEL SUITS
Larger loads and longer running.
WHAT IT COSTS
Higher purchase price.
WHAT RATINGS MEAN
Two figures are usually given: a maximum output and a continuous output.
WHICH TO SIZE AGAINST
The continuous figure.
WHY
Running at maximum continuously shortens life considerably.
WHAT LOADING MATTERS
Generators are most efficient at a substantial proportion of their rating.
WHAT RUNNING LIGHTLY LOADED CAUSES
Poor efficiency, and in diesel engines, deposits that damage the engine.
WHAT THAT MEANS
An oversized generator is not a safe choice.
WHAT TO SIZE FOR
Your essential load, with headroom for starting currents.
WHAT ELSE TO CONSIDER
Noise Where it will sit How fuel will be stored Who will service it
WHAT TO NEVER DO
Place a generator indoors or in an enclosed space.
WHY
Exhaust fumes kill, and it happens regularly.
