VOTOL EM50 SP (LIN)
VOTOL EM50 SP is a compact 72V sinewave controller with 50A rated battery current, 55A boost, and 190A peak phase current. Suited for 1-2kW PMSM/BLDC motors — commonly paired with QS90 mid-drive or small QS hub motors in entry-level e-moto / e-scooter builds. Features flux weakening, IP67 waterproofing, and LIN communication. Uses VOTOL's "Old Version" EM/SV-series connector architecture: 3 flush Mini-Fit Jr headers (function 2×8, alarm 2×4, hall 2×3) + screw terminals for power/phase. Programmable via PC with the Old Version USB cable (shared with EM100SP, EM150SP, EM200P).
In brief: 48–72V controller. 50A continuous. 55A peak. Sinewave, dual mode, regen, field weakening support. From $76 across 5 sellers.
Where to Find
Prices tracked across 4 sellersAliExpress - SIAECOSYS Official Store
$78.14 + $21.25 shipping
AliExpress - SiAECOSYS Electric Powertrain Store Store
$76.31 + $23.68 shipping
AliExpress - SIA Tech Store
$85.31 + $24.82 shipping
AliExpress - Zhejiang Siaecosys Technology Co., Ltd. Store
$85.81 + $24.94 shipping
AliExpress - Zhejiang Siaecosys Technology Co., Ltd. Store
$85.81 + $24.94 shipping
AliExpress - SIAECOSYS Official Store
Out of stockAliExpress - SiAECOSYS Electric Powertrain Store Store
Out of stock* Shipping estimates are for the contiguous US and may vary by location.
* This page contains affiliate links. WattWorks may earn a commission at no extra cost to you. Learn more
Specifications
Type
- VESC Based
- No
- Cooling
- Air
Electrical
- Voltage Range
- 48–72V
- Continuous Amps
- 50A
- Peak Amps
- 55A
- Max Phase Amps
- 190A
Motor Features
- Regen Support
- Yes
- Drive Mode
- Sinewave
- Sensor Mode
- Dual Mode
- Field Weakening
- Yes
- Self-Learning
- No
- Dual Motor Support
- No
- Controller Pairing
- No
Inputs
- Throttle Support
- Yes
- PAS Support
- No
Display
- Supports Display
- Yes
- Requires Display
- No
- Protocols
- SiAECOSYS ONE-LIN
Power Switch
- Supports Power Switch
- Yes
- Requires Power Switch
- No
- Requires Pre-charge
- No
Programming
- Via Display
- No
- Via Phone
- No
- Via PC
- Yes
Physical
- Weight
- 955 g
- Dimensions (L×W×H)
- 200mm × 108mm × 65mm
- IP Rating
- IP67
Ports & Connectors
No port details available
No port details available
