Extreme Team Lithium 48V 100AH (58.4V) Pack

[mnealuf]

I think I had the SOC calibrated properly when I installed the pack. Fully charged it, let settle an hour and set meter to 100%. But when the meter read 17% once pack shut off. The Daly app was actually higher like 26% so we headed home but was still like 3 blocks away. The battery case meter was at 0% but was driving it until I was pushing it. Now I don’t trust it.

Originally Posted by Tom47

As a very smart man (Pat911) told me early on, LiFePo4 voltage is not linear with the SOC meter and shouldn't be considered when deciding charge status.

In fact, you should charge your LiFePo4 pack, let the charger shut off, then zero your SOC meter at 100%. This will automatically put your Amp/hour meter at full pack Ah.

You can pretty much ignore the voltage readings for all practical purposes. Start your ride at 100%, and ride until you have a 20% SOC minimum. This will give you an emergency get home charge without damaging your pack.

Remember you can charge liFePo4 every day if you want. Ten 10% charges equal ONE life cycle, just as one 100% charge equals ONE life cycle. This way I always have my pack topped off in case I get the urge to take a 30 mile ride.

That doesn't happen too much this time of year!