I assume this is accomplished via the use of a diode on the control circuit of the relay, but I have never really looked into it. With a uni-directional ACR, the alternator will charge the auxiliary battery when the van is running, but the solar will not charge the starting battery when the van is not running. Of course, I don't need the inverter for the iPhones, but the laptop is probably an issue.īy the way, my auxiliary battery is 60Ah (main battery is 70Ah).Īs for the SurePower 1314, does that mean that even when the car is running, the flow is uni-directional, or does it mean that power from the solar panel will only go to the auxiliary batter? The way I understand the relay on Eurovan Weekenders is that it will flow in either direction when the car is running, but is separated when not running. I will be charging things like iPhones, iPods, DSLR camera battery, and a laptop. I'll take pictures in the morning when it's light outside. If you want to be happy, practice compassion. If you want others to be happy, practice compassion. This means the auxiliary battery gets all the juice from the solar, but your starting battery is isolated, so it won't run down as long as the loads you are running are attached to the auxiliary circuit. #Rv battery isolator relay solenoid top post install#If you want to be able to easily add solar in the future, a good way to do so would be to install the SurePower 1314 uni-directional battery separator: This type of automatic charging relay will allow the alternator to charge your auxiliary battery while the van is running, but won't allow any power from a solar panel (connected directly to the auxiliary battery) to flow back into the starting battery. Let us know what you are planning to power from the inverter and we might be able to make some suggestions. Most of the stuff that people tend to bring with them on the road (phones, laptops, tablets, rechargeable batteries etc) can be charged directly with DC chargers instead of using an inverter (that converts from 12VDC to 120VAC) with a home type charger (that converts from 120VAC back to 6-24VDC for many applications). Most affordable inverter's are only about 80-85% efficient, which means you are losing 15-20% of the already limited potential auxiliary battery power to waste. Unless your auxiliary battery is more than 125Ah, I would strongly suggest skipping the inverter if at all possible. The terms "solenoid" "relay" and "isolator" often mean different things to different people and can sometimes be used interchangeably. Post a picture of what you have for a relay on your auxiliary battery. Will that work with the stock system, or will I need to introduce an isolator solenoid? I would like to add an inverter directly to the auxiliary battery, and eventually a battery charger so I can charge both batteries if I'm ever at an RV park (and also possibly a solar panel). There's clearly no solenoid in my stock weekender setup (just a relay). How is this setup different from the setup described here? So, while stationary, the auxiliary battery can be exhausted while the main battery is unaffected. The cooler and two outlets are protected by a separate fuses, located next to the aforementioned relay. The second battery is there to power only the small cooler under the rear facing seat behind the driver, and the two 12V outlets on either of the rear bent seat (no on 1993 models). When the engine is shut down, the relay separates the two batteries. #Rv battery isolator relay solenoid top post drivers#Whenever you start the engine, the two batteries are bridged by a relay located next to the 2nd battery, also under the drivers seat. It is isolated from the primary battery (located under the hood above the transmission) by a relay. The second battery in your Eurovan MV is located under the drivers seat. I'm planning on using the aux battery while camping and don't want to drain the main battery.
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