3 Battery Brands. 3 Different Apps. None of Them Talk to Each Other.
Every BMS manufacturer ships its own Bluetooth app. JBD has Xiaoxiang BMS. Daly has SmartBMS. JKBMS has JK Assistant. If you built a system with mixed brands — and most DIY builders do — you're juggling 3 or 4 apps just to check your batteries.
MultiBMS speaks all 9 protocols. Connect every pack in your system to a single dashboard. See combined voltage, total current, and per-cell health across all your packs — regardless of who made the BMS.
One App for Every BMS in Your System
- JiKong (JK-BMS) — Also Heltec, LiTime, Redodo, Power Queen, Gobel Power. The most popular BMS in the DIY solar community.
- JBD / Xiaoxiang — Also Overkill Solar, Liontron, Aolithium, Ultimatron. Widely used in RV and marine builds.
- Daly (New) — H/K/M/S series using Modbus RTU over BLE. The current generation of Daly BMS boards.
- Daly (Legacy) — J/T/A/U/W/ND series using fixed 13-byte frames. Still common in older installations.
- ANT BMS — ANT-BLE and ANT-BMS devices. Popular in Chinese DIY battery packs and electric vehicle builds.
- Seplos — V2 and V3 series using Modbus RTU. Common in server rack and industrial battery systems.
- PACE / EG4 — ASCII protocol v20/v25. Used in EG4 server rack batteries and PACE-branded systems.
- Victron SmartShunt — GATT-based protocol with unique 128-bit UUID. Battery monitor integration for Victron systems.
- SOK / ABC-BMS — CRC-8/MAXIM-DOW checksums, 20-byte frames. Found in SOK batteries and ABC-BMS-equipped packs.
Auto-detection via Bluetooth advertising — zero configuration. MultiBMS identifies the protocol automatically when you tap Connect.
Every Data Point Your BMS Reports, Visualized
Pack Overview
Pack voltage (0.01V precision), current (charge/discharge with direction), SOC percentage, power in watts, and temperature — all updating live over Bluetooth.
Cell Voltage Bars
Individual cell voltages for up to 32 cells with color-coded health indicators. High/low cells highlighted instantly. Delta voltage display shows imbalance at a glance.
Temperature Monitoring
Up to 4 temperature probe readings displayed in real time. See ambient, cell, MOSFET, and environment temps depending on your BMS configuration.
Balancing Status
Per-cell balancing indicators show which cells are actively balancing. Know exactly when your BMS is working to equalize your pack.
Sparkline History
Mini voltage and current charts show recent trends inline. Spot charging patterns, load spikes, and balancing activity without leaving the dashboard.
Auto-Reconnect
Walk away, come back, and your BMS is already reconnected. No manual re-pairing. MultiBMS remembers your devices and picks up right where you left off.
Monitor Your Entire Battery Bank at Once
Connect multiple battery packs simultaneously and see them all on one screen. Color-coded cards show voltage, current, SOC, and status for every pack. Parallel bank aggregation calculates combined voltage, total current, and total capacity across all connected packs — even if they're different brands running different protocols.
Combined Metrics
See total system voltage, aggregate current draw, combined Ah capacity, and overall SOC across your entire bank. One number for your whole system.
BLE Scanner
Scan for nearby BMS devices with signal strength indicators and protocol auto-detection. Tap to connect — add packs to your dashboard in seconds.
What MultiBMS Monitors
- Pack Voltage — Total pack voltage with 0.01V precision
- Current — Charge and discharge current with direction indicator (amps)
- State of Charge — SOC percentage as reported by the BMS
- Power — Real-time wattage (voltage x current)
- Cell Voltages — Up to 32 individual cell readings with min/max/delta
- Temperatures — Up to 4 temperature probes (ambient, cell, MOSFET, environment)
- Balancing State — Per-cell active/inactive balancing indicators
- Cycle Count — Total charge/discharge cycles recorded by the BMS
- Protection Status — OVP (over-voltage), UVP (under-voltage), OCP (over-current), OTP (over-temp)
- MOSFET Status — Charge and discharge MOSFET on/off state
Know Before It Becomes a Problem
Configurable Thresholds
Set custom low-voltage, high-voltage, high-temperature, and low-SOC warning thresholds per pack. Get alerted the moment a value crosses your limit.
Haptic Feedback
Vibration alerts when thresholds are breached so you notice even when the screen is off. Critical warnings you can feel, not just see.
Protection Flag Alerts
Instant notification when your BMS triggers a protection event — over-voltage, under-voltage, over-current, or over-temperature. Know immediately.
14 Visual Themes — Make It Yours
4 free themes included. 10 premium themes available for $0.99 each. Choose from Cyberpunk (neon-on-dark), Minimal (clean white), Retro (amber terminal), Military (OD green), Carbon Fiber, Blueprint, Sunset, Ocean, Forest, and Stealth.
4 Free Themes
Default, Dark, Light, and Classic ship with the app. Clean, functional designs that work in any lighting condition.
10 Premium Themes
Cyberpunk, Minimal, Retro, Military, Carbon Fiber, Blueprint, Sunset, Ocean, Forest, Stealth. $0.99 each — no subscriptions, yours forever.
Built for Builders
- DIY Solar — Monitor your LiFePO4 bank from the couch. Track charge cycles, cell balance, and SOC without walking to the battery closet.
- RV / Camper — Keep tabs on your house batteries while boondocking. See real-time power draw and remaining capacity at a glance.
- Marine — Monitor engine start and house batteries from the helm. Track multiple banks with different BMS brands simultaneously.
- Electric Vehicles — E-bikes, e-scooters, golf carts, NEVs. Per-cell monitoring helps catch failing cells before they strand you.
- Off-Grid — Cabin, tiny house, or remote site. MultiBMS works without internet — just Bluetooth between your phone and BMS.
- Forklift / Industrial — Monitor fleet batteries across shifts. Spot packs that need attention before they fail on the warehouse floor.
Connected in Seconds
- Open & Scan Launch MultiBMS and tap scan. Every compatible BMS in Bluetooth range appears with signal strength and auto-detected protocol.
- Tap to Connect Select your BMS. MultiBMS identifies the protocol and begins streaming live data immediately. No configuration, no pairing codes.
- Monitor Everything Watch cell voltages, pack current, temperatures, and balancing status update in real time. Add more packs to build your full multi-pack dashboard.
One Price. No Subscriptions. Ever.
MultiBMS App
- All 9 BMS protocols
- Multi-pack monitoring
- Real-time cell voltages
- Configurable alerts
- Auto-reconnect
- 4 free visual themes
- All future protocol updates
Coming soon
Premium Skins
- Cyberpunk, Minimal, Retro
- Military, Carbon Fiber
- Blueprint, Sunset, Ocean
- Forest, Stealth
- Buy only the ones you want
- Yours forever — no expiry
Coming soon
Bluetooth Only. No Data Leaves Your Device.
MultiBMS communicates directly with your BMS over Bluetooth. No data is collected, transmitted, or stored on any server. There are no accounts, no analytics, no tracking. Everything — cell voltages, pack data, alert history — stays on your phone.