









Orion BMS 02 - Replacement Harnesses
Orion Replacement Harnesses
OEM-grade Orion BMS harnesses for Standard (legacy) and Orion 02 controllers. Choose Main I/O, Current Sensor + Thermistors, or Cell Tap harnesses in 6' and 12' lengths.
- Automotive-grade terminals
- Correct pinouts
- Labeled leads
- Stocked lengths
Quick selector
Main I/O Harness
6 ft Main I/O harness for Orion Standard (legacy) and Orion 02 controllers.
Part | SKU | Length | Compatibility |
---|---|---|---|
Main I/O Harness | CWHMIO3 |
6 ft (1.8 m) | Orion (legacy) & Orion 02 |
Current Sensor + 8 Thermistors Harness
Eight (8) thermistors (2 m each) pre-wired into the current-sensor connector.
Part | SKU | Thermistors | Compatibility |
---|---|---|---|
Current Sensor + 8 Thermistors Harness | CWHCRTH8 |
8 Γ 2 m | Orion 02 only |
Cell Tap Harnesses (Orion 02 only)
Choose series count and length for your pack topology.
6 ft (1.8 m)
Cells | SKU | Length | Compatibility |
---|---|---|---|
12-cell tap | CWH126G |
6 ft | Orion 02 only |
24-cell tap | CWH246G |
6 ft | Orion 02 only |
36-cell tap | CWH366G |
6 ft | Orion 02 only |
12 ft (3.7 m)
Cells | SKU | Length | Compatibility |
---|---|---|---|
12-cell tap | CWH1212G |
12 ft | Orion 02 only |
24-cell tap | CWH2412G |
12 ft | Orion 02 only |
36-cell tap | CWH3612G |
12 ft | Orion 02 only |
Selection & installation tips
- Match your controller: Main I/O fits legacy Orion and Orion 02; Current Sensor + 8 Thermistors and Cell Tap harnesses are Orion 02 only.
- Length matters: Use the shortest length that reaches cleanly; avoid tight bends near connectors.
- EMI hygiene: Separate tap harnesses from HV busbars and traction cabling; maintain shielding/grounds per manual.
- Labeling: Verify tap order before connection; a Cell Wiring Validator can save hours.
Helpful Orion accessories
- SOC Display w/ Data Logging β CAN logging 100 ms to 10 s.
- Cell Wiring Validator β Confirms correct tap order before first power-on.
- Thermistor Expansion Module β Add up to 80 thermistors per module.
- Orion BMS Connect β Remote monitoring and diagnostics.
FAQs
Are these harnesses compatible with the legacy Orion (pre-O2)?
Main I/O (CWHMIO3) is compatible with both legacy Orion and Orion 02. CWHCRTH8 and all Cell Tap harnesses listed are Orion 02 only.
How do I choose 12/24/36-cell tap harnesses?
Match the harness to the tap header count on your Orion 02 and the segment size (12/24/36 cells). Use multiple harnesses to cover the full series count.
Can I mix 6' and 12' harnesses in one pack?
Yes. Keep lengths consistent per segment for neat routing and even slack management; avoid unnecessary excess length.
Do you offer custom lengths or assemblies?
Contact EVolve Engineering for custom harnessing, breakouts, and labeling.
Β
Couldn't load pickup availability
Pickup available at EVolve Electrics Office
Usually ready in 24 hoursPairs well with

Orion BMS 02 - Replacement Harnesses
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