Direct Drive. Technical motion, published in full.

Modtek Direct Drive is a two-model line of rechargeable tubular motors — they are a connected-control high torque motor powered with long life Lithium Ion batteries.

Read the specifications Compare the two motors

Cutaway of the Modtek Direct Drive tubular motor: control head with Type-C port at the head end, then the drive coupling, the lithium-ion cell, the DC motor and the helical gear train driving the crown — Both models share this architecture

Modtek Direct Drive — line data MTK-SD Rev A Sheet 01 of 02

Assembly of the Direct Drive tube, shared by the MOD28 and the MOD25.
No.	Property	Value	Remark
01	Rated torque, line	0.5 – 1.8 N·m	MOD25 and MOD28 as published
02	Stored limit positions	Up to 6	Upper, lower and four intermediate
03	Charging interface	USB Type-C	Solar charging listed on both models

02 · Assembly

Five parts, one tube

Both Direct Drive motors carry the same architecture: a control head carrying the Type-C port, a drive coupling, a rechargeable lithium-ion cell, a DC motor, and a helical gear train driving the crown.

01 Control head · Type-C 02 Drive coupling 03 Li-ion cell 04 DC motor 05 Gear train · crown

03 · Two motors, one decision

Connected control

Direct Drive MOD28

The higher-torque cordless motor. Rechargeable 3000 mA/h cell, reversible direction for either mounting side, travel memory and up to six stored positions — with RF, Bluetooth, ZigBee and Matter listed on the chip.

1.8 N·m

Torque

3000

mA/h cell

IP44

Enclosure

Manual + powered

Direct Drive MOD25

The round-head cordless motor, sized to most existing roller assemblies. Rechargeable 2600 mA/h cell, a wider charging window and up to six stored positions — with RF and Bluetooth control alongside hand-pull operation.

0.5 N·m

Torque

rpm

IP64

Enclosure

04 · Specifications, side by side

Direct Drive — published specifications

Sheet 02 of 02

Published specifications for the Direct Drive MOD28 and the Direct Drive MOD25.
Specification	MOD28	MOD25
Rated torque	1.8 N·m	0.5 N·m
Rated speed	25 rpm	30 rpm
Rated power	18.5 W	2.9 W
Rated current	2.5 A	< 0.4 A
Battery capacity	3000 mA/h	2600 mA/h
Charging input	Type-C DC 5 V	Type-C DC 5–9 V · solar DC 4–18 V
Control method	RF / Bluetooth / ZigBee / Matter chip listed	Manual pull · RF remote, ASK 433.92 MHz · Bluetooth
Stored limit positions	Up to 6	Up to 6
IP class	IP44	IP64
Operating temperature	−10 → +45 °C	−10 → +55 °C
Solar accessory listed	AC601-03	AC605