Renogy 500A Battery Monitor with Shunt, High and Low Voltage Programmable Alarm, Range 10V-120V up to 500A, 20ft Shielded Cable, Compatible 12V Lithium Sealed, Gel, Flooded Batteries,Black

Work fine in the application I need it for

Bem acabado, gostei

Works great for me applications, boat and rv with this you control your battery power accurate, what is going out, and what is coming in

The Renogy 500A Battery Monitor with Shunt was received in good condition. It was professionally packaged and is of good quality. My application is the off-grid power source for my well. The input is 860-Watt peak solar array, output through the batteries to a 3000-Watt, 230 Volt AC inverter to power my well pump. The on-time duty cycle of the pump is low. Follow the instructions and connect both the C- charge source and the P- Output (load) to the Shunt sampler P- terminal. Also "Teach" your battery bank capacity to the monitor per the instructions. Keep in mind that the Amp reading and Watt reading is the Net current and Net power. Example; you may have 10 Amps coming from the charge source, but a 4 Amp load so the Battery monitor will read +6 Amps going to the battery. With no charge source current (solar panels in the dark) the meter will read -4 Amps for the same load. Think of it as the old center 0 analog Amp meter, but with much more useful tracking of the Net Amp-hours going in and out and percent of remaining capacity of the battery bank. It should be used with a quality charge controller that has an Amp meter so you can distinguish the total solar power output. My charge controller cable going to the sampler P- terminal is AWG 4 because my solar array is capable of 52 Amps peak output. My load cable going between the sampler P- terminal and the 3000-Watt inverter is AWG 2/0 because it can draw over 250 Amps. My only complaint is the mounting of the meter itself. It is designed to be snapped into a panel rectangular cutout dashboard rather than surface mounted on a wall. I Macgyvered a mounting bracket for it from what I had available. Overall, it is good value, good quality, accurate and reliable.

My $150k RV has a dumb battery meter that tries to guess capacity from voltage. Adding this meter gave me actually useful info. It’s awesome how it seamlessly switches between time remaining (when on discharge) to time until full (when charging). It’s been flawless. I 3D printed a small housing for it and it looks right home in my RV. The shunt was easy to install and can handle big current without adding resistance. I looked at cheaper options and they came with bad shunts, small screws/lugs, and got poor reviews for reliability. Don’t do it- just get the Renogy.