![]() ![]() This compact device has 3 connection points, main battery, secondary battery, and pre-wired ground. So there will be a small parasitic draw for balancing both batteries during that minute. The device stays on for less than a minute between shutting off your vehicle and running parallel with your main battery. When installed correctly, you can run power into your secondary battery without affecting the main starting battery. This is a smart battery isolator, charger, and jump starter all rolled into 1 palm-sized device. If you’re running a second battery, I’d highly recommend getting this. Apparently solenoids do not from my research so far. The isolator it’s self induces a bit of a voltage drop. I am not just talking about the drop because of the length of the cable run to the rear of the vehicle. Of course that may not have been enough to turn over my engine considering the starter battery was for the most part, completely depleted.Īlso, I was not aware that an isolator create a voltage drop going to the second battery. ![]() If they made one that could draw say 400 to 500 A I would’ve been much happier. It would be nice if I could pull more than 150 A though. Again, this device is working as it was designed. After doing more research, maybe what I really need, is a continuous duty solenoid. However I did not ruin the isolator itself because of its built in circuit breaker. Well the starting battery needed more than 150 A to turn it over. I thought great I have this new gizmo, so I press the button so that I could drop current from my secondary battery. After leaving town for a few days, and returning, my starting battery was down to 3 V. That parasitic battery draw that I mentioned earlier. This way I can just reach over and manually hit the switch to connect both batteries, for easy starting if the first battery is low. However I installed this on the interior of my car. It would at least be nice to have some kind of manual override. However, the fact that I only have to hook up the positives from each battery to this unit and then a simple grounding of this unit, makes this something I can easily live with. It’s somehow supposed to detect the true voltage of the first battery and not start charging the second battery until a certain voltage level on the first battery is present. It detects the 14 and immediately starts charging the second battery. I’m getting exactly 14 volts off of my alternator. The second thing is that it starts charging the second battery faster than I would like. The first reason is that it doesn’t come with something to cover the positive terminal’s. There are only two small reasons why I wouldn’t give this a five out of five. This works very much as stated in the description. I just cut it in half where it ran through the cab of my vehicle and installed the device in between. The largest of course, is the four gauge wire to my stereo amplifiers. So now I can use those extra leads, to move one circuit at a time to the rear battery. I am fortunate enough to have several leads, originally for the accessories, that run all the way to the rear. The nice thing is that I’ll be able to easily figure out if it’s just my accessories, or if it’s something running off of the ECU that won’t shut down. I bought an AGM deep cycle battery for the accessory battery. ![]() The second reason why I bought this, is because I run a lot of accessories and I’m installing a second battery for towing purposes and the accessories. The first reason is because I have a parasitic draw on my starting battery. California Prop 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. For over 30 years, WirthCo has been a prime manufacturer of practical products for making life easier and safer. It includes a mounting bracket and over-current and surge protected for vehicles with electronic systems. This is water resistant making it suitable for marine use (IP62). Also, with a single push of the override/reset button, you can change the batteries to parallel mode for jump-starting. High-performance electronic isolator allows you to charge two batteries from a single alternator, and keeps the starting battery isolated from the second battery. Smaller and lighter than other standard battery isolators, the battery isolator employs electronic switching control technology. WirthCo Battery Doctor Battery Isolator - 125/150 peak amperes is a state-of-the-art, fully automatic, dual battery controller that is suitable for any vehicle with an auxiliary battery. ![]()
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