Or! You can use a DC to DC battery charger. Many of these "smart" battery isolators have other features, such as charge profiles to charge the battery all the way, diode protection, delayed operation for engine start and so much more. This will allow charging from the vehicle only when the voltage is high enough. The most important feature that your battery isolator needs to have is voltage sensitivity. If you use the right equipment such as an alternator that is designed for charging deeply discharged batteries, you may be able to safely pull it off. In these instances, a battery isolator maybe appropriate. Motorhomes have a battery isolator that controls power flow from the engine’s alternator to the coach starting battery and the RV’s house battery bank. With that said, some people who live far from the equator or have significant cloud cover, cannot depend on their solar panels producing the power they need.
Yes the voltage may go up on your battery bank, but the total amount of energy delivered to the batteries is very small unless you drive all day. You need to drive your vehicle for hours at a time to create any noticeable amount of electricity.Some marine grade and large alternators are designed to charge large battery banks, but not the standard ones that come with modern day vehicles. You may overheat and damage your alternator, or the voltage regulator. Battery isolators have the potential to hurt your vehicles charging system (the charging system of a vehicle is not designed to charge deeply discharged solar batteries).
R V BATTERY ISOLATOR DRIVER
The resultant flickering of lights would alert the driver of the system overload.I am not a fan of most battery isolators, because: When the chassis voltage goes above 13.3 volts again, the relay will again close in about two seconds to retry and charge the coach battery. This might happen when the alternator is not able to supply sufficient current to all of the loads. If the voltage should fall below 12 volts for more than two seconds while the ignition is on, the relay will drop out to feed all the alternators available output to the chassis battery to keep the engine running. When the ignition switch is turned off, the relay will open immediately. When this voltage goes above 13.3 volts for approximately 12 seconds, as happens when the engine is running normally (normal alternator output voltage is approximately 14.4 volts), it will close the isolator relay providing charging current to the coach battery.
The unit operates as an isolator by sensing the level of voltage on the chassis 12 volt system. VKS XR-GLQ2 12V 140 Amp Dual Battery Smart Isolator Installation Kit Fit ATV, UTV, Boats, RV s, Campers 5th Wheels. It also allows the use of self-exciting alternators. VKS XR-GLQ2 12V 140 Amp Dual Battery Smart Isolator Installation Kit Fit ATV, UTV, Boats, RV s, Campers 5th Wheels Off Road Vehicles Rhino Polaris Artic Cat ETC Voltage Sensitive Relay VSR. It provides a delay to allow the engine to briefly "warm up" and to recharge the main battery before placing the heavy load of a discharged auxiliary battery on the alternator.
The Battery Isolator Relay Delay/E is a reliable approach to charging multiple batteries on a vehicle. Dual Battery Smart Isolator Features: EASY TO INSTALL: Designed for dual battery systems or second battery bank in your van, truck, RV, UTV, off-road vehicles. Intellitec Battery Isolator Relay Delay 00-00629-120
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