![]() This company’s battery chargers and inverters are top-notch. Victron Energy is a Danish brand many people trust for their mobile power requirements. Victron Energy SmartShunt 500 Amp Battery Monitor What to Look for When Buying an RV Battery Monitorġ2 Best Battery Monitor for RV Reviews 2023 1.ANCEL Battery Monitor Bluetooth Voltmeter SIMARINE PICO SC303 Smart Marine and RV Battery Monitor 12 Best Battery Monitor for RV Reviews 2023.To help you make the most of your camping trips, here are some factors to consider when looking for the best RV battery monitor. This RV essential is something you don’t want to miss. In a nutshell, you need to have a reliable battery monitor system to check your battery’s current state. The good news is, these undertakings are avoidable by making sure that your batteries are functioning properly, if you know the charge status and how much energy is running in and out of the battery bank. If you have a generator, then luck is on your side, however it would still probably take three or more hours to get a full recharge. Such an incident would not only spoil your vacation, but it may also lead to battery damage in short order. Without any gauges to check if the batteries are charging, you’re likely to be in for a surprise! Think about the food in the fridge, the cold night without the heater on, and the lights, for goodness’ sake. The larger unit, with a 500A shunt, is under $80 and may be found on Amazon, eBay and other online retailers.Who wants to have a dead battery bank in the middle of camping nights? Oh, I bet you don’t. ![]() I prefer the larger display, but it is a bit more expensive. The 500A version has a larger display panel, and it displays SoC, amps, volts, watts and time all together on one screen with no buttons to push. The smaller unit is under $50 and may be found on Amazon, eBay and other online retailers. Available with either a 100A or 350A shunt. The 100/350-amp version has a small round display that shows SoC, and there are buttons to allow you to access amperage, wattage and voltage displays. After making sure that amperage and voltage are being measured and displayed, a simple calibration step synchronizes the device with your battery bank, and no other recurring calibration is needed. long!) connects the shunt to the meter head, which can then be mounted in a convenient location. ![]() The shunt may be placed in the battery compartment, as it has no active components on it, and it isn’t a potential spark source. This provides the power to run the meter head. An additional lightgauge wire is added between a terminal on the shunt and a +12V source. Then, a second cable (supplied by the installer) is connected between the shunt and the battery bank. They are easy to install and set up: the main negative cable from the battery bank is removed from the batteries and connected to the shunt. They work with lead-acid and lithium battery systems, and these things are surprisingly accurate! I’ve been testing them for a couple of months and I am amazed at how well they work. As you draw power from the battery bank, or recharge it, the monitor keeps track of how much current is flowing in or out over time and computes the SoC in percent. Simply stated, these devices use a calibrated shunt to measure current flowing to or from the battery bank and keep track of the current state of charge. I was thrilled to discover these little AiLi monitors from HENGSHAN, on Amazon, and the low price prompted me to buy a couple. There have been battery monitoring devices available for years, but the high cost, usually several hundred dollars, has kept me from buying one. While you can estimate SoC by reading the battery voltage, it’s not accurate. I’ve always wanted to be able to monitor my RV’s house batteries and know their state of charge (SoC).
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