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VOTOL EM30SP is an entry-level 48-72V sinewave controller with 32A rated DC / 37A boost current, suited for 500-1000W PMSM/BLDC motors in small e-scooter / e-bike builds. Tier above EM25P — adds the full alarm/anti-theft system with the 3 Molex connector layout. Features flux weakening, IP67 waterproofing, LIN communication, and programmable via PC. Uses the standard VOTOL '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 the Old Version USB cable.</description> <parameter name="adminNotes">Source: AliExpress (SIAECOSYS SIA Tech Store + Zhejiang Siaecosys Technology direct listings) + community data. Specs: 32A rated / 37A boost / 48-72V / 1000W / IP67 / LIN / 40KPH top speed per SIAECOSYS product description. Phase peak estimated at ~130A (VOTOL doesn't publish the full spec sheet). VOTOL product page is currently dead (votol.cn/product/votol-em-30s/ returns 404) — specs captured from multiple SIAECOSYS-direct AliExpress listings. The EM30SP and EM30S names are used interchangeably by sellers; current production appears to use "EM30SP" naming on VOTOL's distribution channel (SIAECOSYS). **Wiring (admin-verified 2026-04-18):** EM30SP housing has the full 3 Molex header architecture (function 2×8, alarm 2×4, hall 2×3) — standard Wiring A. Includes alarm/anti-theft support (unlike EM25P which lacks it).

In brief: 48–72V controller. 32A continuous. 37A peak. Sinewave, sensored, regen, field weakening support. From $54 across 2 sellers.

Type

VESC Based
No

Electrical

Voltage Range
48–72V
Continuous Amps
32A
Peak Amps
37A
Max Phase Amps
130A

Motor Features

Regen Support
Yes
Drive Mode
Sinewave
Sensor Mode
Sensored
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
700g

Ports & Connectors

Power Input2-position Screw Terminal Block
Power
1Battery +
2Battery -
Phase Wires3-position Screw Terminal Block
Motor Phase
1Phase A
2Phase B
3Phase C
Hall Sensor/
Hall Sensor
15V Power
2None
3Ground
4Hall A
5Hall B
6Hall C
Function Harness (2×8)
Alarm / Anti-theft Harness (2×4)
Alarm Power
security
1Ground
2Alarm Power
Anti-theft Motor Lock
security
1Anti-Theft Key
2Anti-Theft Signal
3Wheel Signal
4None

Included Components

Frequently Asked Questions

Other Controllers

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