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Outdoor & Recreation
Campers, Vans & 4WD's
Aux battery charging from 12V cig socket
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<blockquote data-quote="condor22" data-source="post: 300696" data-attributes="member: 1932"><p>Can't go wrong.</p><p></p><p>As I've told others many times, knowing the voltage is a "very" rough guide to battery "State of Charge" (SOC). The SOC of a deep cycle battery is measured in AH, so having a simple Ammeter in a circuit will give the immediate load, but won't record the overall v time.</p><p>The next step is to put an Ammeter on the input side of a circuit and another on the output, that will give the net effect of charge or discharge, but again not over time. </p><p></p><p>The final step is to have ammeters on input and output that calculates over time what goes in and what goes out and the net effect on SOC. That is the only accurate way of knowing what you have. i.e. The BMPRO or similar.</p><p></p><p>Again keep in mind that if you are using an AGM all day every day, keep the Depth of Discharge (DOD) to about 25% of battery capacity and if only used on the occasional trip, no more than 50% DOD. Or somewhere in between dependent on frequency of use. Using this as a guide, if you are using more than this you have 1 of 2 choices - 1. reduce the load. 2. get a bigger battery <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="condor22, post: 300696, member: 1932"] Can't go wrong. As I've told others many times, knowing the voltage is a "very" rough guide to battery "State of Charge" (SOC). The SOC of a deep cycle battery is measured in AH, so having a simple Ammeter in a circuit will give the immediate load, but won't record the overall v time. The next step is to put an Ammeter on the input side of a circuit and another on the output, that will give the net effect of charge or discharge, but again not over time. The final step is to have ammeters on input and output that calculates over time what goes in and what goes out and the net effect on SOC. That is the only accurate way of knowing what you have. i.e. The BMPRO or similar. Again keep in mind that if you are using an AGM all day every day, keep the Depth of Discharge (DOD) to about 25% of battery capacity and if only used on the occasional trip, no more than 50% DOD. Or somewhere in between dependent on frequency of use. Using this as a guide, if you are using more than this you have 1 of 2 choices - 1. reduce the load. 2. get a bigger battery :) [/QUOTE]
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Outdoor & Recreation
Campers, Vans & 4WD's
Aux battery charging from 12V cig socket
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