Why Variable Speed? — Benefits
The variable speed system is
considered to be environmentally friendly due to its lower fuel consumption.
Reductions
of between 35 and 50% can be achieved when compared with fixed speed
generators on typical domestic variable loads.
Reduction of exhaust pollution to atmosphere.
Lower fuel consumption also reduces exhaust pollution at the same
levels.
Smaller battery storage system required.
We recommend a battery storage capacity that meets your requirements
during quiet times. This is generally an 8-hour period when the
load demand is less than 1 KW/e.
The variable speed system operates best at low loads — as low as
1 KW/e. The more power stored in batteries, the lower the efficiency
of the system. It's also worth noting that smaller storage battery
systems can also help reduce capital cost.
An Optional Spa Heater can further reduce fuel
costs.
The optional home hot water heater for the land based system is only
available with a 9.5 KW/e Yanmar engine. This system recovers engine
waste heat that can be circulated to the jacuzzi providing free heating
capability. This eliminates the need for a gas or electric heater,
thus no additional fuel is consumed and there is subsequently less
pollution.
The system overall performance.
There is a general misconception that using a smaller generator (KW/e
rating) with a load sharing inverter to meet peak load demands
and storing energy into a battery bank for later withdrawal is
efficient.
Consider however, there is an initial loss whilst charging the batteries
via the generator, even when the generator is charging at peak efficiency.
This power is then stored in the battery and withdrawn via the inverter.