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I spliced into the stereo’s accessory wire for the 12v inputs to the switch, and did the same for the reverse trigger wire. I think the installation of reverse cameras has been covered over and over, so I’m just going to share a few photos from my van and the diagram you’ll want to follow for the switch wiring. Everything I used is recommended in my article: “ My Basic Automotive / Van Build electrical tool kit“ You’re going to need crimpers and crimp terminals, as well as solder gear. You may or may not need this depending on your vehicle and cable routing. Be on the lookout for Copper-Clad Aluminum. The actual power (100mA?) doesn’t call for wire this thick, but since I was running it under my van - I like this choice because the insulation is just durable enough. 16-Ga Copper Primary Wire (for running 12v power).Resolution is so-so, but can be “unmirrored” for use in the front. ![]() Or if you’re doing this in a Ford Transit, this switch and housing is what I used. This way, only one camera is powered on at a time and either switch position will activate the reverse camera feature of my Pioneer head unit. #Aili battery monitor wiring diagram installMy solution was to install two aftermarket cameras, feed them both into the reverse camera RCA input, and power the reverse trigger wire and one of the two cameras at a time via a simple switch. Unfortunately, accessing the forward camera input involves 3 or more button presses. The reverse camera has a trigger wire that automatically pulls it up on the screen when it is sent 12v power (the intention being that this is wired into a circuit powered up when the vehicle is in reverse). Take the Red wire from the solar panel and connect it to the anode of 1N4007 Diode. At the input side, it has two connections named IN+ and IN. Now, take the TP4056 Li-Ion Battery Charger Module with battery protection. My Pioneer head unit, installation details here, has both front and rear camera inputs. One is Red, which is the positive wire and the other is black (or brown in my case), which is the negative wire. ![]() But due to cloudy weather recently and short days in winter (I'm in northern Italy) I cannot know when the batteries are at 100%.The Ford Transit factory 4″ reverse camera in my otherwise-pointless rear view mirror leaves a lot to be desired for me. The instructions for the AiLi monitor suggest calibrating it by telling it when the batteries are at 100%. temperature, water level inside the batteries, initial chemical composition of the liquid? And would I need to measure each of the 24 batteries and then average them out? How do I convert the measurement into an SOC or capacity estimate? What are all the factors I'd need to account for? E.g. ![]() Measure the SOC using a hydrometer (?) and calibrate accordingly? I believe something of this nature is possible, though I don't know exactly how. What reduced capacity would be appropriate in this case? FWIW the batteries have rarely discharged down below 60% (as shown by the BMV-700, whatever that's worth) and only twice below 50%. 330Ah, to account for the batteries' reduced capacity over 5 years of use. (B) pre-program it for a reduced capacity, e.g. I think it worked well, because the batteries still seem to function well, although I don't have any empirical measurement of this beyond "we generally have had power when we needed it". This is what I originally did with the BMV-700. (A) I could pre-program it for a capacity of 360Ah. How would you suggest going about it? A few options / questions: So I need to calibrate the battery monitor. While I try to get the warranty activated I want to use this cheap AiLi monitor to tell me the State of Charge (SOC) (and eventually replace the broken BMV-700 with a repaired one). I had a Victron BMV-700 battery monitor that has worked well for the past 4 years and 11 months but recently broke. #Aili battery monitor wiring diagram seriesThe setup is a 17280w battery bank (24 lead-acid units of 2V each, rated at 360Ah at C5, in series for a total of 48V) that is charged by solar panels via a Victron SmartSolar MPPT 150/70, and supplies AC current via a Victron Multiplus 48 / 3000 / 35-16 Inverter. #Aili battery monitor wiring diagram how toI'm not sure how to go about it given the age of the batteries and the fact that I am not currently able to charge them to 100%. I am looking to calibrate a new battery monitor for an off-grid battery bank that's ~5 years old, since the previous battery monitor stopped working recently. In support of my suggestion, the connecting lug for the brown wire at the battery looks too large for the single 6 sq mm brown wire. ![]()
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