Re: Charging two batteries
Have a look at this.<br /><br />schematic <br />Admiral <br />Member # 4724 <br /> posted May 21, 2002 10:06 PM <br /><br /><br />--------------------------------------------------------------------------------<br /><br />Batteries batteries batteries, what a neat subject...<br /><br />The reason there is so many questions and opinions on the subject is cause there are so many variables in how they are used...<br /><br />In general......<br /><br />>Don't leave unmatched batteries connected together when not running.(one may drain the other over time)<br /><br />>Don't rely on the O/B charging system to replenish "troller" or "house" batteries if they have been deeply discharged (takes way too long)<br /><br />>Don't waste money on a combiner if you don't use a shore powered charger, or regulated charging system. Their "claim to fame" is less voltage loss than a isolator. With a non-regulated charging system, we have ample voltage to contend with.<br /><br />In my opinion.....<br /><br />>for an O/B system with 2 batteries (one for backup)<br />*use a 1,2,all,off switch and alternate each time out from 1 to 2 (this will give maximum battery life) <br /><br />>for an O/B system with a "start" and a "troller" battery/batteries<br />*use a 1,2,all,off switch. Use the all position for emergency starts.<br />*charge the trollers with shore charger<br /><br />>for an O/B system with a "start" and "house" battery/batteries<br />*use a 1,2,all,off switch. Use the all position for emergency starts.<br />*charge the house batteries with shore charger<br /><br />**Isolators (diodes) can be used effectively on dual battery systems when a non-regulated charging system is present. <br /><br />**leave the battery switch in off position when boat is unattended (less fire hazard)<br /><br /><br /> <br /><br />c/6<br />Hooty
