Smart battery monitoring for vans, RVs and off-grid
AegisNomad PowerView
Turn a 20 EUR touchscreen into a professional battery monitor for your JBD BMS - 24h charts, alarms, multi-battery manager, Home Assistant integration and 6 languages.
See it in action
From box to dashboard in five simple steps.
From bare screen to smart battery
PowerView turns a low-cost touchscreen into a permanent window into your lithium battery - and, in Home Assistant mode, into a fully automatable smart battery.
- Always-on BLE link keeps your BMS safe from strangers' phones
- Standalone offline mode or full Home Assistant integration
- Buy once, yours forever - official builds, 2 years of updates
How it works
- Buy the firmware here and the 3.5" Guition screen on AliExpress (~20 EUR).
- Flash it from your browser in about 3 minutes - no tools, no soldering.
- Pick Standalone or Home Assistant on first boot and start monitoring.
Compatible with: JBD / Xiaoxiang Bluetooth Smart BMS (common in LiTime, Redodo, Power Queen and similar LiFePO4 batteries).
Not sure your battery is compatible?
Before buying the full firmware, flash the demo/test build and try it with your own battery. If it shows live values over Bluetooth, the licensed firmware should work with the same BMS.
Test before buyingProduct updates
Receive release notes, new product options and update announcements.
About
From the server room to the open road
Hi, I'm Pablo - a systems engineer, a traveler, and the person who answers your support emails.
I've spent more than 15 years keeping critical IT infrastructure alive across Europe: data center operations at Amazon AWS in Frankfurt, Windows and Linux administration at the European Union Aviation Safety Agency, backup engineering at Veeam, and enterprise systems in the automotive industry. Monitoring, automation and reliability are not a hobby I picked up for this project - they are what I do for a living. You can read the full story on my portfolio.
Why PowerView exists
I'm also a passionate RV traveler. When I upgraded my own rig to lithium, I hit the same wall every vanlifer hits: my battery had a Bluetooth BMS full of valuable data - and the only way to see any of it was digging out my phone, opening a clunky app, and waiting for it to connect. No permanent display. No history. No alarms while I slept. For a battery that cost four figures, that felt absurd. I'm an engineer, so I fixed it - first for my own van, then, when I realized how many people had the exact same gap, for everyone.
The security problem nobody talks about
Here's something most lithium battery owners don't know: a Bluetooth BMS will talk to any smartphone in range. Anyone parked next to you at a campsite can download the free app, connect to your battery, and change its protection settings - charge limits, cutoff voltages, cell parameters. Done maliciously or even accidentally, that can permanently damage a very expensive battery.
PowerView turns this weakness into a strength. The BMS accepts only one Bluetooth connection at a time - and PowerView holds it, always on, 24/7. While your screen is connected, nobody else can pair with your battery. The same link that gives you live data acts as a permanent guard on the only door into your BMS.
From dumb battery to smart battery
In Home Assistant mode, PowerView works as a bridge: every BMS reading - state of charge, power, current, voltage, per-cell voltages, temperatures, alarms - is advertised automatically as an entity, no configuration needed. Build dashboards with charts and switches, keep long-term history, and create real automations: start the inverter generator below 20%, send a phone alert when a protection triggers, cut heavy loads when cells run cold. Your battery stops being a sealed box and becomes a first-class citizen of your smart home on wheels.
Try it, then own it
PowerView has no cloud dependency, no subscription and never phones home. Try the complete firmware free for 10 minutes, flashed straight from your browser. Your purchase is then a lifetime license for your device: the official tested build, a 3-minute browser installer, two years of updates - and support from the person who wrote the code. That's me. And your hardware is never locked: if you ever repurpose the screen, erase it and flash anything you like.
Safe travels - and may your state of charge always be high.
Blog
Stories, updates, and new releases.
AegisNomad is live: PowerView turns your Bluetooth battery into a real monitor
AegisNomad is live: PowerView turns your Bluetooth battery into a real monitor
Today aegisnomad.com opens its doors. PowerView is firmware that turns a 20 EUR Guition JC3248W535 touchscreen into a professional battery monitor for JBD/Xiaoxiang Bluetooth BMS batteries - the smart BMS found in many LiFePO4 packs from LiTime, Power Queen, Redodo, WattCycle and similar brands. No wiring, no soldering, no cloud: the screen talks to your battery directly over Bluetooth and shows state of charge, power, current, per-cell voltages, protection alarms and 24-hour charts, in six languages.
Try it before you pay anything. Not sure your battery is compatible? Flash the free 10-minute demo straight from your browser - if the demo finds your BMS and shows live values, the full firmware uses the exact same connection. You can also check the battery compatibility guide first.
What a license gets you: a lifetime per-device license with official tested builds, a one-click browser installer, automatic over-the-air updates you install right on the screen, two years of firmware updates and email support. For home and van automation fans, the Home Assistant mode turns every BMS reading into an entity - automations, phone alerts and full history, with no extra hardware.
This is day one. The firmware already ships with guarded expert controls like full-SOC synchronization and charge limiting, and more is on the way. If you want release notes and product news in your inbox, subscribe to product updates in the box at the top of this section - and if you try PowerView with a battery brand we have not listed yet, tell us and we will add it to the compatibility guide.