01
Find Weak Modules
Locate faulty or underperforming modules inside a degraded pack before reassembly or repair.
Electric Avenue EV Diagnostic Tool
TBMM
Tesla Battery Module Monitor
Check classic Tesla Model S/X battery modules for voltage levels, balance state, and overall health — with active balancing and Wi-Fi monitoring built in.
Module-level diagnostics & balancing
Just testing terminal voltage is not enough.
The TBMM quickly finds faulty cell groups with large imbalances, bad BMB boards, loose sense wires, and other issues. Use it to monitor and actively balance modules over time outside the pack via its integrated display, Wi-Fi web server, and audible alarms.
01ConnectPlug into the module's BMB connector using the included cable.
02Power UpProvide power via USB-C from a wall adapter, power bank, or phone.
03DiagnoseInspect cell group voltages, detect faults, and check board health.
04BalanceAutomatically active-balance modules for optimal capacity and matching.
Capabilities
What the TBMM does for you
02
Salvage Yard Scouting
Quickly test piles of S/X modules at a salvage yard or auction to cherry-pick the healthiest units.
03
Automatic Active Balancing
Now with balancing features included! Automatically balance your Tesla Model S or Model X modules outside the pack for best range and perfect matching to your existing battery system.
04
BMB Board Health
Check Battery Monitoring Boards (BMB) for issues due to corrosion, moisture, or electrical faults.
05
Sense Wire Testing
Pinpoint loose or broken sense wires that might otherwise cause mysterious pack faults.
06
Wi-Fi Web Server
Connect over Wi-Fi to view live data, cell voltages, and module stats directly in your web browser.
07
Multi-Module Expansion
Base kit connects to 1 module; optional custom harness cables support 2, 4, and up to 16 modules.
08
Audible Alarms
On-board buzzer provides immediate sound alerts when voltage thresholds or faults are detected.
Package & Power
Ready to work out of the box
Complete TesterIncludes TBMM display hardware, integrated stand, and single-module connection cable.
USB-C PoweredPowered via standard USB-C from a portable battery bank, wall charger, or compatible phone.
Multi-Module ReadyCables available supporting 2, 4, and up to 16 modules concurrently.
OTA UpgradesSupports Wi-Fi OTA firmware updates for new features and enhancements.
Pricing & Ordering
Get your TBMM
Complete Kit$140 USD
TBMM tester complete with display hardware, stand, and single-module connection cable.
Add-on CablesCustom
Harness cables supporting 2, 4, and up to 16 modules. Contact us for options and quotes.
Firmware Upgrade$20
One-time fee to upgrade older hardware versions to active balancing, live web server, and OTA updates.
Shipping: $10 USA · $25 Canada & Mexico · $35 Europe · Worldwide shipping available
Video Demonstration
See the TBMM in action
Watch a comprehensive demonstration of the TBMM testing, diagnosing, and balancing classic Tesla battery modules.