Forum Discussion
theoldwizard1
Oct 26, 2020Explorer II
time2roll wrote:
Charging is fairly slow. If you are really relying on getting a full charge while you drive 4 to 6+ hours consider a DC-DC charger to get the right voltage on the trailer battery.
https://www.renogy.com/12v-dc-to-dc-on-board-battery-charger/
Almost all vehicles manufactured after 2000 use some kind of "samrt charging" system. This LOWERS the output of the alternator to about 13.2V (after a few minutes of starting) which is not high enough to recharge your house batteries. It is usually adequate to prevent them from discharging further.
If you really want your house batteries recharged, you MUST use a DC-DC charger. There are a few manufacturers who make such devices.
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