Addmotor M-380 Tandem Dual battery vs Addmotor Soletri II M-366XM-380 Tandem Dual battery vs Soletri II M-366X
Both checked Sep 2026 against manufacturer pages
Key differences
What actually differs
Same 750W motor.
Weight
Addmotor is 17 lb lighter
Addmotor
147 lb
Addmotor
130 lb
Total load
Addmotor carries 100 lb more
Addmotor
550 lb
Addmotor
450 lb
Rider plus cargo.
Rider limit
Addmotor allows 150 lb more
Addmotor
500 lb
Addmotor
350 lb
The most the rider alone can weigh.
Battery
Addmotor has 140% more
Addmotor
~2,304 Wh
Addmotor
~960 Wh
Addmotor figure calculated from 48V × 48Ah. Addmotor figure calculated from 48V × 20Ah.
Verdict
Which one for you
- Easiest to lift or carryAddmotor Soletri II M-366X17 lb lighter overall.
- Heavier ridersAddmotor M-380 Tandem Dual batteryHighest published rider limit (500 lb).
- Longest ridesAddmotor M-380 Tandem Dual batteryLarger battery. Both range claims are the brand's, not tested.
- Easiest to get onAbout even17″ vs 17.3″ step-over.
Full specs
Side by side
SpecAddmotor M-380 Tandem Dual batteryAddmotor Soletri II M-366X
Fit
Step-over height
17.3″
17″Better
Rider height
5′2″–6′4″
5′2″–6′2″
Seat height
31.55"-45" (min/max saddle height)
32.5"
Rider limit
500 lbBetter
350 lb
Total load
550 lbBetter
450 lb
Seats
2 (tandem, independent front and rear pedals; rear backrest)
Banana seat (23.5" x 8.5") for two riders
Motor
Rated power
750W
750W
Battery
Capacity
~2,304 WhBetter
~960 Wh
Voltage and amp-hours
48V · 48Ah
48V · 20Ah
Range and speed
Claimed range
130 Miles (2 batteries, PAS1)Better
85 miles (PAS1)
Top speed
20 mph
20 mph
E-bike class
Not published by brand
Class 2 (not stated by brand)
Size and folding
Folds
No
No
Folded size
Doesn't fold
Doesn't fold
Weight
147 lb
130 lbBetter
Wheels
24" front / 20" rear
20"
Brakes and drivetrain
Brakes
Tektro mechanical disc brakes on each wheel
Tektro Aries mechanical disc, 180mm rotors, motor inhibitors
Parking brake
Yes
Yes
Gears
Shimano 7-speed
Shimano Altus 7-speed (1x7, 14-28T cassette)
Rear differential
Yes
Yes
Comfort and safety
Suspension
Oil spring fork, 80mm travel
Full suspension: ADDSHOX 20" dual-crown oil spring fork, 80mm travel + rear suspension…
Certifications
UL 2271 (battery)
UL 2271 (battery)
List price
Price
$4,699
$2,799Better
"Better" marks the stronger figure where one clearly exists. Range and battery claims are the brand's own. "~" means we calculated it. "—" means we haven't checked it yet. Sources and any conflicting figures are on each model page.