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VESC Harmony 32
From: €299.99 ex VAT
The Harmony 32 BMS can manage up to 32S cells in series for batteries discharging up to 600A
The Harmony 32 is a high-power BMS which can manage up to 32 cells in series for batteries discharging up to 600A. An on-board ESP32 micro-controller running open-source VESC Software enables precise real-time monitoring and balancing of individual cell groups. VESC Tool enables complete flexibly to configurable all the parameters of the BMS so that the battery can be operated safely. With a maximum charge current of up 30A and real-time monitoring of cells, the battery can be wirelessly monitored while waiting for the battery to charge. This BMS also features short circuit protection up to 600A with a 10µs response time.
Isolated CAN-bus connectivity allows for seamless integration with other VESC devices for effective communication between all devices in the system. Other communication methods include USB-C, Wi-Fi and Bluetooth for convenient and flexible options to connect, configure and monitor the device using VESC Tool.
Suggested applications include small electric vehicles such as E-bikes, electric motorbikes, go-karts, trikes and buggies.
The following items are included:
1x VESC Harmony 32 BMS
4x JST-GH 2 pin 500mm cables
2x JST-GH 6 pin 500mm cables
1x JST-GH 8 pin 500mm cable
1x JST-GH 9 pin 500mm cable
1x JST-GH 10 pin 500mm cable
Made in Sweden
24 month limited warranty
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Maximum input voltage of 135V (32s Li-Ion battery cells)
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Short circuit protection up to 600A with 10µs response time
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Charge current configurable up to 30A
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Built-in power switch with precharge circuit
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Open-source firmware/scripting supports coding of custom applications that can run on the onboard ESP32-C3
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Four configurable temperature sensor inputs compatible with NTC 10k Ohm 3380 B
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Broad range of communication interfaces including USB, Bluetooth, Isolated CAN-bus, and Wi-Fi
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Included cross-platform configuration tool enabling easy setup of custom batteries and monitoring of cells
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Fully configurable integrated sleep mode with ultra-low sleep current to support under-voltage-lockout, and auto power-up and shutdown
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Integrated temperature sensors automatically protect the system during high power draw
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Extreme depth of customization with VESC Tool Desktop (Linux, Windows, Mac) and both Android and iPhone applications
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Integrated ESP32-C3 supports both station and access-point Wi-Fi connections alongside BLE 5
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Monitor the state of charge either by voltage or coulomb counting
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Balancing after charging allows using lower balancing currents over longer time to handle large unbalance without generating excess heat
| Specification | Values |
|---|---|
| Rated Battery Series (Li-Ion) | 4 – 32S |
| Charge Current (max) | 30A |
| Battery Current (max) | 600A |
| Length | 123mm |
| Width | 71mm |
| Height | 28mm |
| Weight | 180g |
| Refer to the datasheet for full details. | |
What is the maximum regeneration current?
It mainly depends on what the battery cells can handle rather than the BMS. The BMS itself can take the same regen current as output current as it goes through the main power path.
Through the charging port it can only go up to the specified charge current.
Charge current, battery current, and battery regeneration current can all be individually configured using VESC Tool to suit your specific application, hardware or performance requirements.
The BMS does not respond and it is impossible to connect over USB/WiFi/Bluetooth
Most likely the BMS has entered sleep-mode. Sleep mode is entered when
- Power is off
- Nothing is connected over USB, Bluetooth or Wifi
- Not balancing
- Not charging
- Block sleep is disabled in the settings
Notice that block sleep is enabled by default, but it will disable itself after a few hours to avoid draining the battery.
In sleep-mode it is not possible to connect to the BMS over USB, Bluetooth or Wifi. To leave sleep mode you can
- Enable the power output by bridging EN and ENs on the comm-port
- Connect a charger
Do you offer discounts for bulk or B2B orders?
Yes, we offer a discount when ordering 3+ and 10+ units which can be seen on the website. For order quantities over 50 units please send your business details and order requirements to info@vesclabs.com, and our team will provide a customized quote and lead time.
Do you offer OEM or customized solutions?
Yes, we do. Please contact us at info@vesclabs.com with your project requirements and specifications, and our team will assist you with tailored OEM or custom solutions.
Do you offer discounts or sponsorships for students, projects, or educational institutions?
Yes, we do. Please send the details of your project and institution to info@vesclabs.com, and our team will review your request.
Do you offer paid integration, setup and tuning support?
Our partner Oliver, also known as Electricfox, offers paid consulting services for BMS and motor controller integration, setup, tuning and load testing. His website is
At the bottom of the page you can find different options to contact Oliver
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xgunax (verified owner) –
Finally the real VESC discharge BMS! Amazing build, well protected shippment.