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Electric Systems

Low Voltage Cabin Electrics

12V

Advantages

  • Full range of equipment readily available.

Disadvantages

  • Voltage drop problems in long cable runs

24V

Advantages

  • Voltage drop is not normally a problem
  • Smaller cables and so less cost to install

Disadvantages

  • Not all equipment available in 24V


Generating 230V

There are 3 main ways of producing mains 230V electricity whilst out cruising:

  • Separate generator
  • Engine driven 230V generator
  • From the batteries via an inverter

The important factor to be taken into account is the size, in watts, of the appliances that you are likely to run on board and the total number of watts being run simultaneously.

Remember that it contravenes CRT's licence conditions to run a generator or an engine between 8pm and 8am whilst moored up.


Portable suitcase style separate generator

Advantages

  • Cheaper option
  • Easy retro 'fit'
  • Sine wave supply

Disadvantages

  • Tend to be small output - sometimes less than 1000W
  • Petrol driven: petrol not safe on board - needs dedicated gas-tight locker for petrol storage if to pass BSS
  • Gas driven : acceptable to BSS - just - but awkward to set up
  • Can only recharge batteries through a mains charger

Built-in separate generator - diesel combustion engine

Advantages

  • Plenty of power - usually 3000W or more
  • Just switch on and run
  • Fuelled from the main or separate tank
  • If main engine broken can still have 230V power and, if a mains charger is fitted in your boat, charge the batteries.
  • Sine wave supply

Disadvantages

  • Expensive to fit
  • Often raw water cooled so need to check the filter regularly
  • Air cooled motors are noisy
  • Often not possible to retro fit
  • Can be noisy - motor runs at constant speed either 1500 or 3000rpm
  • 2 engines to service etc
  • Uses almost the same amount of fuel regardless of the load

Built-in separate generator - diesel Stirling engine

Advantages

  • Almost silent
  • 'Free' hot water & central heating
  • Plenty of power - usually 3000w or more
  • Just switch on and run
  • Fuelled from the main or separate tank
  • If main engine broken can still have 230V power
  • Sine wave supply

Disadvantages

  • Very expensive to fit
  • Often not possible to retro fit
  • The generator is a DC unit charging the batteries for an inverter
  • 2 engines to service etc
  • Uses almost the same amount of fuel regardless of the load

Engine-driven 230V generator

Advantages

  • Cheaper than separate, built-in generator
  • Running and servicing costs for 1 engine only
  • Usually 3500W supply when engine running at 1700 rpm - 1000W at about 1100rpm
  • 'Free' mains power when travelling

Disadvantages

  • If main engine breaks down, no means of charging batteries & no 230V
  • Not always compatible with modern 3-stage mains battery chargers
  • Older units not pure sine wave

Inverters

Advantages

  • Silent mains power any time
  • Cheaper than built in diesel generators
  • 'Free' mains power when travelling
  • When using high power equipment with a large inverter, running the engine at the same time, especially if there are two alternators, means the unit acts like a 230V alternator

Disadvantages

  • 230V not available when the batteries become flat
  • Outputs vary - 300W to 3000W
  • May need a second alternator to reduce recharge time
  • Cheaper units are not pure sine wave

We are open and busy: by working remotely, within the current restrictions

For all enquires, whether to sell your boat or buy a boat
we can be contacted by phone on 01788 822 115
or email admin@abnb.co.uk

We offer virtual viewings of boats, by pre-arrangement: please ask for details

Remember our office is closed and we cannot accept visitors

Business Hours

7 days a week:

9.30am to 4.30pm

EMAIL ABNB

Our Offices

  • ABNB Ltd

    Crick Wharf Marina, West Haddon Road, Crick, Northampton, NN6 7XT
  • 01788 822 115

  • admin@abnb.co.uk

Information