![]() ![]() For the diameter of the eyebolts, refer to the data sheet of the isolators. The input and output cables must be sized at 20mm² (80A / 4 = 20mm²). The sizing of the input and output cables must be made according to the source current (rule to apply: between 3 and 4 Amps per mm² depending on the distance).Įxample: for an 80A alternator and 2 batteries, RCE/100-1E-2IG model is recommended. ![]() (Reminder: all the batteries connected to the isolator must have a common negative). The negative of the isolator must be connected to the common negative of the batteries (on FASTON terminal – use a 0.5mm² cable – note: if this terminal is not connected, there is a major risk of destruction of the distributor). The output terminals must be connected to the positive of the battery banks. The input terminal must be connected to the output of the alternator or the DC source concerned (solar panels, wind turbines, chargers). Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. The power supply must be switched off during installation. VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. A few models - such as the Ja圜orp Dual and KeyLine Smart - are designed with advanced technology that enables them to monitor the voltage of each battery individually to prioritize which requires focus for charging.We recommend installing the battery isolator vertically as close as possible to the batteries. While the Zoostliss Power isn’t constructed to handle a ton of current, reports indicate that it’s an ideal choice for light duty that provides remarkable value. As we included it on our list, we obviously think it’s a model well worth considering, but it should be noted that it offers no water resistance or accommodation for inrush current from motor loads, and its design also looks like it might not lend itself to as many installation options as some others.įor users looking for ways to help make sure their single-battery systems stay in ship shape, our rankings for solar battery maintainers may be of interest to you. When your vehicle is running, current throws the switch closed to allow current to flow from your vehicle charge system back to your RV. Somewhat comparable to a vehicle starter relay, the solenoid is a big electrically operated switch. We added the NewishTool Switch Charge to our list, and it first caught our eye with its sleek, metallic housing, but what really held our attention was its integrated voltmeter, which takes simultaneous readings from both your batteries and displays them side by side on its simple LCD. The simplest battery isolator is nothing more than an electromechanical relay. This supports simultaneously charging more than one battery from a single alternator or other power sources without connecting the batteries in parallel. That being said, the utility they offer is nothing close to some of the smart options higher up on our list, so please don’t think that we’re suggesting a disconnect as an apples-to-apples alternative to an isolator. A battery isolator is used to separate the DC bus into multiple (isolated) branches and only allow current flow in one direction in each branch. However, we decided that these picks were still worth including at the bottom of our list, for the benefit of users on a budget who don’t mind using devices like these to manually disconnect their secondary batteries when they’re not in use. We also put some serious thought into axing the Zoostliss Cut Off and Audew Disconnect Switch, as neither of these options are actually isolators, with both essentially being simple kill switches. We spent a while digging through our existing choices, and eventually determined that most of them were still good picks for the category, but we did end up doing away with the Install Bay 5841730504, noting that it closely resembled some of our other relay-based choices, and noticing that it’s no longer listed on the company’s website - which led us to wonder whether this model might be facing discontinuation. ![]()
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