GlennWest Posted April 28, 2023 Report Share Posted April 28, 2023 (edited) Mine is showing 0 percent and is at 56.60 volts. Max is 57.6. Why isn't showing a percentage correctly? Now that it is fully charged it went to 100%. Edited April 28, 2023 by GlennWest Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Chad Heiser Posted April 29, 2023 Report Share Posted April 29, 2023 It most likely has to do with the settings for the shunt. If the settings are incorrect, it won’t synchronize properly on a full charge and the state of charge will be wildly off over time. Less likely is the zero point calibration is off. If it accidentally got calibrated while a load (or charge) was present then all the readings will always be off because it’s zero point is off. Quote 2009 Volvo 670 with dinette/workstation sleeper - Walter 2017 DRV Mobile Suite 40KSSB4 with factory mods, dealer mods and personal mods - now in the RV graveyard 2022 DRV Full House MX450 with customized floor plan 2018 Polaris RZR Turbo S (fits in the garage) 2016 Smart Car (fits in the garage or gets flat towed behind the DRV when the RZR is in the garage) My First Solar Install Thread My Second Solar Install Thread & Photos and Documents Related to the build My MX450's solar, battery and inverter system - my biggest system yet! chadheiser.com West Coast HDT Rally Website Link to comment Share on other sites More sharing options...
oldjohnt Posted April 29, 2023 Report Share Posted April 29, 2023 Glenn I have a different brand of shunt than yours, but I remember the initial set up WAS COMPLICATED I even had to read the directions over n over lol. Best I recall to set the shunts FULL Amp Hours indication to match my batteries energy storage capacity, I left the charger on a couple days then made sure there were no loads or chargers online. I must have done something right because its been over a year and the best I can tell my shunt is accurate from its 100% SOC read out at which time my charger and BMS shut down charging (quits drawing charge current or maybe a trickle maintenance) and I observe SOC slowly lower as loads are applied. I have no idea how yours is programed, but Id guess calibration and set up is the problem versus any hardware issues??? Call Victron and/or re read the directions I guess ???? John T Quote Link to comment Share on other sites More sharing options...
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