I installed a new 100Ah AGM battery, reset the smart shunt stats and fully charged so all sync’d at 100%. Then disconnected the EHU and turned on the fridge to do a duration test. Below are the graphs for the last 2 days as well as the settings from the shunt. I then read up on Peukert and adjust…

So doing a bit more fiddling with the settings. At 50% discharge floor the display is showing 1d4h to go. Seems about right, actually impressively correct as the current load is 9w, that constant, the fridge kicks in about 3 times per hour at 40w (ish). It’s been running about a day, I’d expect i…

I hadn’t but it doesn’t seem to address the fundamental problem. The prominent display of battery percentage does not take into account the discharge floor. So IMHO is kinda useless for lead acid batteries. I should also mention I’m running the beta firmware v3.50~30 in case the behavior I see is…

The shunt does not take account of the discharge floor. SOC is how much you have taken out from the total capacity. It has always been like this, it is a industry definition of SOC. The 50% discharge floor is also not a hard limit, you can go beyond this, you just have fewer cycles. This is nothing…

Agreed I need to set the Peukert correctly, that was just part of my experimenting. While I appreciate what you are saying about SoC I don’t see why there can’t be a setting so we can display the available charge from 0-100% like every other battery display. How much I keep back (to prevent damage…

Battery SoC is wrong

DIY

nesswill (Dave) 11 October 2024 12:19 3

Hi
Have you read This might help

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Battery SoC is wrong

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