MultiVolt vs BMS Pal

MultiVolt shows what your camper batteries are doing — all of them at once. The app connects over Bluetooth directly to the battery management system and reads what it measures anyway: state of charge, voltage, current, power, every single cell voltage, temperature and the BMS protection flags. No account, no cloud, no internet. THE WHOLE BANK AT A GLANCE Several batteries add up to one balance — weighted by capacity, not simply averaged. A 200 Ah battery at 90 % and a 50 Ah one at 10 % make 74 % together, not 50 %. Runtime is calculated from the smoothed current: a cycling compressor fridge no longer makes the estimate jump between 40 hours and 2 hours. EVERY CELL ON ITS OWN Cell voltages as bars, the spread in millivolts, the active balancer. When a cell drifts away, you see it before the BMS shuts down. LIMITS YOU SET YOURSELF State of charge, cell voltage high and low, cell drift, temperature, charging in the cold, current. Per-battery limits where batteries differ — a 280 Ah battery takes currents a 100 Ah one does not. HONEST READINGS A value the BMS does not report shows as "--", never as zero. Zero is a statement; a missing value is not. When a protocol reports no protection status, it says so — instead of a reassuring green check mark. TRY IT WITHOUT A BATTERY Demo mode simulates three batteries with real LiFePO4 physics and stays free forever. You see the whole app before pairing anything. SUPPORTED SYSTEMS • Ective and identical Topband modules (also StartCraft, KiloVault, Wattstunde) • JBD / Xiaoxiang and equivalents • Daly Smart BMS (D2 series and relatives) FREE AND PRO One battery is free — with every reading, all limits, the history and all warnings. MultiVolt Pro monitors up to six batteries at once. IMPORTANT MultiVolt is a display and a log, not a safety device. No commands are sent over Bluetooth — the app only reads. Deep discharge protection, cut-off and overcurrent protection belong in the BMS and must work without a phone. SUBSCRIPTION AND TERMS MultiVolt Pro is a subscription with a monthly or yearly term. It renews automatically until it is cancelled; cancellation is done in the App Store account at least 24 hours before the current period ends. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://multivolt.dkcloud.at/privacy

All your batteries. One app. A JBD pack in the garage, a Victron in the van, a power station on the table - and a different vendor app for each one. BMS Pal ends the app-hopping: every pack you own in one live list, with state of charge, voltage, current, watts, and time remaining. Device detail pages have tools for a deep dive into your devices. Up to eight connected at once. EIGHT FAMILIES AT LAUNCH BMS boards get the deep treatment - per-cell voltages with live balancing indicators, protection alerts, chemistry detection, configuration reads, and confirmation-gated FET control: - JBD (including XiaoXiang and legacy variants) - JK - Daly Battery monitors and power stations get their essentials, with the same charts and history: - Victron (including encrypted advertising) - Junctek KL-F shunt monitors - Bluetti, Jackery, and EcoFlow power stations Coverage varies by family - the full who-reports-what table is at bmspal.app. WHAT IT DOES - Live telemetry: voltage, current, power, temperature, and state of charge stream in as your BMS reports them. Charts hold the last week, so you can see what happened while you slept. - Per-cell detail: every cell gets its own bar, down to the millivolt. Cells the BMS is balancing light up, so you can watch the spread tighten in real time. - Alerts, plainly stated: protection events appear in plain language. No sirens, no red flashing. Just the facts. - Groups: packs that work as one bank read as one battery. Group them series, parallel, or series-parallel and get combined voltage, current, and state of charge. - Capacity tests: run a real discharge test on any pack that reports current. BMS Pal integrates it over time against your cutoff and files the result in the pack's history, so "how many amp-hours, really?" gets a measured answer. - Chemistry detection: BMS Pal reads your protection thresholds and works out whether the pack is LiFePO4 or Li-ion. You can override it - you know your pack best. - Sanity Checks: not sure those numbers are fine? Send a snapshot of your pack for an AI review across six dimensions and get a written verdict back - findings graded by severity, with the reasoning and trade-offs spelled out. You see exactly what is sent before anything leaves your phone, and nothing is sent until you tap. BMS boards only, where the setup can actually be changed. - Write mode, off by default: toggling charge or discharge FETs is serious business on a high-energy pack. Writes sit behind a master switch plus a per-command confirmation, and every attempt is logged. LOCAL-FIRST. ACTUALLY LOCAL. No account, ever. No analytics, no trackers, no background traffic. Your telemetry history lives on your device; delete the app and it is gone. The only network calls are the ones you explicitly ask for (a Sanity Check or a problem report), and you see the exact payload first. THE DEAL Free download, and everything works for 7 days - every protocol, every feature, no card up front. Then $5 unlocks it for good: one purchase, no subscription, no "premium tier" holding features hostage. Sanity Checks run in the cloud and cost real server money, so the app includes 25 and $2 adds 25 more. Everything else runs entirely on your device. ONE DEVELOPER, ONE BENCH Every supported family sits on my bench: 92 wire-protocol variants documented, 1,100+ automated tests in the suite. Got a pack that will not identify, a value that reads wrong, or a feature idea? Report a Problem, Confirm Device Support, and Send Feedback are built in, replies land in your Support inbox, and none of it is ever paywalled. Your reports steer the roadmap. Runs on iPhone, iPad, and Apple Silicon Macs. JBD, XiaoXiang, JK, Daly, Victron, Junctek, Bluetti, Jackery, and EcoFlow are trademarks of their respective owners. BMS Pal is an independent project, not affiliated with or endorsed by any battery vendor. BMS Pal shows you what your BMS reports; it is not a substitute for proper fusing, wiring, and common sense.