Renogy battery monitor6/23/2023 ![]() ![]() I think I’m right in concluding that the monitor isn’t trying to do anything clever like detecting an AGM battery and halving the available charge. 2.07A have been drawn for one hour, so I’d expect the charge level to have dropped by a 2Ah, which it has. The load and voltage haven’t changed, but the power is reported now at 25w, which I assume is a minor drop in voltage, not enough to trigger a decimal drop on the display. The second photo, exactly one hour later, shows 21 hours and 22 minutes remaining, which is almost exactly one hour less, which is terrific. Wait an hour which, incidentally, is just long enough for DubDog Lotta to fall asleep with her gob open: 46.33Ah is 97.53% of 47.5Ah, shown rounded up to 98% in the display. The charge is showing as 46Ah and time remaining (at static load) as 22 hrs 23 mins, which is 22.38 hours. 12.5V x 2.07A = 25.875W, which rounded up to 26W on the display. ![]() The first photo at the start of the test shows the load of 2.07A, battery voltage (under load, obviously) of 12.5V, a reported power of 26W being output. The battery was discharged slightly before the test to remove any unusual behaviour around the higher limits. The sticker on the Exide EP800 says not to discharge below 12.1v, so everything is aligning nicely. AGM battery tables show (as does yours) that 50% DOD is typically associated with 12.1v. The monitor is set with the ‘Capacity’ at 47.5Ah - 50% of the AGM battery’s sales pitch capacity of 95Ah c20. Switching all the circuits on, the shunt monitor reports 2.07A, which can be seen in the photos. Manufacturer‘s info for all lights combined is almost exactly 2A. The constant load is four light circuits with 20 fittings overall. Turning the isolator back to on, I see 0.04 draw, which is another 30mA being drawn from the Control Panel. Either way, 10mA is not going to cloud the readings. This is either the DCC50S or the monitor itself. Isolating all other loads, including the control panel, I usually see 0.01A reported on the monitor. My shunt is the only connection to the LB negative terminal and all return earths run through the chassis, into a 150A busbar, then into the P- of the shunt. Run a constant and known load for exactly one hour without interfering with it.Please see photo of my temp install and wiring diagram showing how it is currently connected.Hi - the fairest test I could think of (with the equipment and time I have) was this: I have done all of the calibration etc, and I set up the max AH as 100 instead of 200 to protect from the 50% discharge rate. With how it is wired, it only shows discharge rate. Last weekend I added the renogy battery monitor screen/shunt in hopes of better accurate readings.Ĭurrently the negative battery post is connected to the -B on the shunt bolt, on the outgoing side of the shunt the -P is connected to the inverter negative in lug, and then the little red B+ wire is connected to the 2nd battery positive post. Setup: 4x100 watt renogy eclipse panels on the roof, feeding into a renogy rover 40a charge controller, that feeds 2x100AH renogy agm's in parallel, connected to a renogy 2000w pure sine wave inverter. I did my best to understand renogy's instruction booklet, I found their cartoon drawing diagram the easiest but doesn't make sense to their verbiage in the booklet, I feel like something is not connected correctly? ![]() My problem: The renogy battery meter lcd screen will only show a discharge rate with down arrows on the screen, even in full sunlight with no load it never gets the up arrow indicating a charge. Hello, first off thanks in advance for the help I have spent weeks researching and waiting for renogy's response (they did respond but did not answer my actual question, I left more confused then when I first started, a friend pointed me to this website, greetings! I hope someone here can point me in the right direction)
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