Marine Generators For Sale

Marine Power

Generators are used anywhere that power is needed and where access to the National Grid is not possible or available, and this is clearly the case with boats. The vast majority of leisure boats of more than 28 feet in length (8.53 metres) use a marine generator to operate the boat’s electrical systems. They can be used as a backup for the boat’s main engine if it is to be switched off, or to save power if away from shore, as generators use considerably less fuel than the boat’s engine and will also save battery power.

Unlike generators designed for land based use, marine generators are specially adapted for use on water and therefore have in built resistance to water and corrosion. Space is always in short supply on a boat and fortunately marine generators do not need as much space as those used on land; they often use sea water circulated by hydraulic pumps to cool them, rather than needing a large built-in cooling system, although some models use a fresh water cooling system.

There are two main types of marine generator used; diesel or gas powered, and the choice of generator will generally be dictated by the type of fuel the boat uses, so a gas powered boat will need a gas generator and a diesel powered boat will need a diesel generator.

Various sizes of generator are available for boats and they are rated by kilowatts of power they can produce. They range from 3KW for a small leisure boat to 25KW+ for larger vessels, such as fishing trawlers, luxury yachts or ferries

Which is the right marine generator for your boat?

A good way to calculate the generator needed for your boat is to add up the wattage of all the equipment and gadgets used on your boat, such as kettles, lights, cooker, air conditioning, or battery chargers, that will need to be powered and then to look for the appropriate marine generator to handle this power requirement.

The new breed of marine generators are small, fuel-efficient and quiet. It is important to consider the noise level from the generator; for example, what would it sound like when you are moored in a tranquil spot without the engine running! Generators that use water to cool the rotor blades are generally quieter than models that use air as a coolant.

There are different speeds of marine generators available; lower speed generators are often quietest, while high speed models are often cheaper, lighter and more efficient.

Whichever type of marine generator you decide to go for, it is sensible to choose a reputable, well known brand of generator, where you can be sure that there is a good service available for spare parts or repairs. It is also essential to make sure a generator is correctly installed, as many marine generator problems occurring in the first six months of operation are caused by poor installation, so always seek advice from a marine mechanic if you are unsure.
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