BMS Monitor: LiFePO4 Battery

BMS Monitor is a Bluetooth lithium battery monitor: it connects to the BMS in your LiFePO4 battery and shows what it measures, live, with no account or sign-up. Charge, voltage, current, power, temperature and alarms at a glance.

Made for batteries in RVs, camper vans, boats and solar setups that have a JBD (Jiabaida) "Smart BMS", the Xiaoxiang family.

COMPATIBLE WITH
JBD / Xiaoxiang Bluetooth BMS, the hardware inside many batteries from Overkill Solar, ECO-WORTHY, Vatrer Power, LIONTRON, Epoch or Datou, and many DIY packs. BMS Monitor is not an official app of any of those brands. Other BMS families use different protocols, and this app can't read them.

FREE
• State of charge at a glance, with pack voltage, charge or discharge current and power in watts
• Today's maximum charge and discharge current
• Capacity: amp-hours remaining out of the nominal capacity
• Average temperature and each sensor's reading, colored by normal, high or dangerous
• Protection: charge and discharge MOSFETs, how many cells the BMS is balancing, and any active alarm (overvoltage, undervoltage, temperature, overcurrent, short circuit…)

Everything comes from what the BMS measures at its own terminals: no estimates.

WITH BMS MONITOR PRO
• Pack details: every cell's voltage, with the highest and lowest marked, red if any drops below 2.9 V, a bolt on the cells being balanced, and the high-low spread in mV
• Cycles and real health: the amp-hours your battery can actually hold, measured automatically when it reaches 100% and stops taking charge
• Charts of voltage, charge and discharge, and remaining capacity, by day, week, month or year
• BMS information: cells in series, sensors, configured nominal capacity, cycles and MOSFET status
• Station and remote modes: leave one phone next to the battery and watch the pack live from another, with a 6-character code (both phones with Pro)
• No ads

While the app is open, the screen stays on, so the phone acting as a station doesn't go to sleep.

LANGUAGES
English, Spanish (Spain) and Spanish (Latin America). The first time it follows your phone's language; change it in Settings → Language.

PERMISSIONS
Bluetooth, to talk to the BMS. On Android the system also requires the location permission to scan for nearby Bluetooth devices; the app doesn't read or store your location.

YOUR DATA
No account, email or password needed. Readings are processed on your phone, and chart history is stored only there. They only leave it if you turn on station mode: then they're published to Google Firebase under a random code, without your name or email, so the phone with that code can see them.

ADS
The free version shows a banner ad at the bottom. Pro has no ads at all. In the European Economic Area, the UK and Switzerland you're asked for consent first, and you can change your choice in Settings → Ad privacy options.

SUBSCRIPTION
BMS Monitor Pro is a monthly or yearly subscription; the app shows the price in your currency before you pay. It renews automatically unless you cancel, and you can manage or cancel it in Google Play → Payments & subscriptions.

Privacy Policy: https://cdpoma.github.io/bms-monitor/support.html