Typically, boats have an engine start battery and an auxiliary battery, whilst some have a third battery for a Windlass or Bow Thruster.
The question is, 'how can they be charged from a single alternator?'
Parallels two batteries when the alternator is charging and seperates them when the engine has stopped.
1,2 BOTH OFF SWITCH
A battery is selected for charging, although generally the Both position is opted for and after charging, select the battery to supply your DC Loads.
VOLTAGE SENSITIVE RELAY
Essentially the same as a Relay with additional features - Prioritising, Charging, Bi-Directional, Protection.
LOW LOSS BATTERY ISOLATORS
Allow for two or three batteries to be charged at the same time from a single alternator.
The voltage drop across the isolator is less than 0.1v.
SPLIT CHARGE DIODE
Can charge up to three batteries.
However, the voltage drop across the diode is proportional to the current and can be up to 0.7v.
To compensate for the voltage drop, a battery management system must be used as this will raise the alternator voltage to ensure the optimum charging voltage to the batteries.
The most important point to note, whichever option you choose, unless the correct charging voltage is applied to the batteries, generally 14.0v, then the batteries will not adequately charge.
|BD02P||B/diode 70A 1 in3 out c/w protective terminal boot|
|BD03P||B/diode 95A 1 in2 out c/w protective terminal boot|
|BD05P||B/diode 120A 1in2 out c/w protective terminal boot|
|BD06P||B/diode 120A 1in3 out c/w protective terminal boot|
|BD07P||B/diode 160A 1in2 out c/w protective terminal boot|
|BD08P||B/diode 160A 1in3 out c/w protective terminal boot|
|BD09P||B/diode 200A 1in2 out c/w protective terminal boot|
|BD11P||B/diode 240A 1in2 out c/w protective terminal boot|
|BD12P||B/diode 240A 1in3 out c/w protective termical boot|
|ABM12100P||ABM Intelligent Solenoid System 12v-100A Twin Bank|
|ABM12200P||ABM Intelligent Solenoid System 12v-200A Twin Bank|
|ABM24100P||ABM Intelligent Solenoid System 24v-100A Twin Bank|
|ABM24200P||ABM Intelligent Solenoid System 24v-200A Twin Bank|
|BS02P||1, 2, Both Switch|
Please call for further information.
Tel +44 (0)1902 380494
Address ADVERC BM Ltd, 245 Trysull Road, Merry Hill,
Wolverhampton, West Midlands. WV3 7LG