Recent content by jahman

Eeeexcellent! That's excatly what I was looking for. Thanks so much, Bob! :) So charge current and power are both shown as a positive numbers (and by extension discharge current and power are negative). Glad that's confirmed and settled! I'm going to have my BattMan rebuild the battery...

Hi, Bob, many thanks for your post! Indeed, the Overkill Support/Downloads page hosts a "Overkill Solar BMS Instruction Manual" bit, as the title says, it's a user manual for the BMS, not the BMS App. It does show a stylized version the screen of the Overkill App on p. 61 of the PDF, alas the...

Hi, Chris! Indeed, I suspect the BMS is on the fritz. But just to be sure I need a screen cap of the Overkill App during charging so I can go to the seller of the battery and request to have the BMS replaced. Alternatively a user manual for the Overkill App would do as well, but I have not...

I'm trying out the Overkill Solar Android App. Alas there seems to be no documentation available and I find the interface confusing because there seems to be no standard regarding (+ve vs. -ve) the sign for battery charge vs. discharge. Since my BMSs seem to be screwed-up and a picture is...

That's an estimate based on voltage vs. SOC tables on the web. These atables are only accurate 100% if they apply specifically to the cell make and model, but in any case what the BMSs are showing is way off. No, they were assembled by a professional manufacturer. Yes! I am in the process of...

Actually yes, charge and discharge currentss are reversed and I'm sure that's part of the problem. Any idea what could have caused that? For to BMSs at the same time?

Ah, yes, indeed, it's requesting Bluetooth access (of course) and not GPS. My brain gears must have skipped a few teeth. Access granted, App loaded! Shows the Bluetooth signal strength for my two BMSs in dB and makes an instant fan out of me. Then Android asks me to allow access to photos...

Howdy, OTRwSolar! Couldn't get the Overkill App to run because I refused to give it access to my GPS location, something it really doesn't need to do. Also the App looks quite complicated with a lot of parameters I better not learn about because I knpw if I do I'll start messing with them and...

Many thanks for your input, OTRwSolar! I didn't recalibrate anything. When I purchased the batteries the Xiaoxiang App worked as advertisied, until now. Also, I don't have write privileges set for the BMS: They are locked by the manufacturer for both batteries. How would I go about...

The Xiaoxiang App used to work fine on both BATTs. Now I went to recharge my BATTs (I keep them at 50%-60% for long term storage) and as I recharged them I noticed on boththe SOC was going down instead of up! I tried the Overkill Solar App but it's way too complicated for my needs. And as I...

Many thanks PreppenWolf for your reply! My batteries are both 4-Cell LiFePO4's and have BMSs. All individual cells are balanced and show the same voltages in the BMS App. The batteries have been hardly used and have been well taken care of.

Hello! On two BATTs, the Xiaoxiang BMS App at: https://play.google.com/store/apps/details?id=com.jiabaida.little_elephant The App mis-calulates the BATT SOC: When I charge the BATT the SOC decreases! When I use the BATT, the SOC increases. This happens on two different batteries! I have...

Hello all! Noob here. Got myself two LiFePO4 batts special-ordered (12V@29Ah and 12V@11Ah) with a Bluetooth-enabled BMS in each. I have no problem connecting to each batt via the App (User v. 3.2, the latest from Google Play) and seeing a limited set of params. My vendor tells me the BMSs...