Charge the caravan battery from the car's alternator:
Correctly ladespænding i din bil he 14,2 - 14.4V at + 25 ° C, measured at the battery terminals. Lower temperatures require higher charging excitement while higher temperature requires lower charge excitement.
When you connect your camper on the car 13 pol stik, the battery of the caravan recharged from the car's generator. The distance between the car and caravan lead voltage drop, and thus the voltage caravan battery should have too low. When you measure the charging voltage by the car's poles to measure ca. 14,4 Volt, and to measure the caravan battery when the car's generator lets you will measure approx. 11,5 (depending on the length of your cables and cable thickness). Being caravans battery only charged with 11-12 volt, have the battery in the caravan is not sufficient voltage 14,4 Volt, which cause the battery can not be charged to full capacity, and the battery may eventually destroyed.
The voltage drop occurs on the cables between car and caravan example 14,4 Volt (He was) and about. 11-12 Volt (measured by the poles of the caravan battery), may be offset so the caravan battery is left with about. 14,7 volts by using a fully automatic battery charger Battery Booster.
Battery Booster should be placed as close to the caravan battery as possible, using Battery Booster needed you not to draw new thick cables for proper charging voltage (Due to voltage drop), Battery Booster ensure proper charging to 14.7V with 8A -10 A per hour depending on the brand battery booster you choose.
Several brands battery booster is fitted with a rectifier in a Battery Booster, why you while ensuring that the current can not flow back. That is if your car battery drained because you use electricity in the caravan, can you risk the large flow volumes burning wires of (see more below in the article) – Once built a rectifier in a Battery Booster can not run large flow volumes back. A Battery Booster is usually built with multiple outputs, so you can connect your refrigerator to Battery Booster, and you will get the correct charging current for the fridge, which then cools optimally / properly. Battery life is significantly extended, when using battery Booster.
NB. Remember to always mount a rectifier between car and caravan – Why mount rectifier:
As previously announced, several brands battery booster built-in rectifier.
A rectifier ensure that power can not flow back, that is, if your car battery drained because you use electricity in the caravan, can you risk the large flow volumes burning wires of the car / caravan – The rectifier provides which prevents large amounts of current and, thus, burn wires of. Read more about rectifier and connecting m.v. via link at bottom of page.
AND 1212 and Prime Power LEAB battery booster, for instance, built rectifier. Have your battery booster not built rectifier, you can mount a rectifier separate.
See the following picture of a Battery Booster: