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Open Motors (formerly OSVehicle) is a project to create an OpenSource car platform that it can be a perfect to run a GNU/Linux system on it


TABBY EVO is a hardware open source platform for electric vehicles. Free to use, available to everyone. It’s the 2nd version of our platform: now it’s harder, better, faster and stronger. It is an open source framework for the creation of vehicles: it can be used to bootstrap businesses (electric vehicle startups), to create your own vehicle, for education purposes, and much more. By using it you can save a lot of millions of dollars and years of R&D. All the plans and blueprints can be downloaded in the website’s download section. You are welcome and encouraged to improve the designs, work on them, and upload them to share your ideas with the community through the OSV forum. Inspiration: Tabby cats are cute, sharp and very intelligent. Although other cats are also intelligent, these cats learn well to live with humans and enjoy their lives.

  • Speed 80 (mph)
  • Range: 75 (miles)
  • Power: 19 (kW)
  • Weight: 838 (lb)


  • Performance numbers are for research and testing purposes only and may vary.

Top Speed

  • Depends on the bodywork
  • 100 Km/h (62 mph), platform only
  • 129 Km/h (80 mph), but depends on the bodywork and low Cx coefficient

Max Range on standard batteries

  • Depends on the bodywork
  • 80 Km (50 mi), platform only
  • 120 Km (75 mi), but depends on the bodywork and low Cx coefficient

Max Climb*

  • Stable at 25%
  • * Depends on final vehicle weight

Approach and departure angles

  • Approach angle: 35 degrees
  • Departure angle: N/A (wheels are behind the chassis)
  • * Note: Platform only, numbers will change with weight and exterior body designs

Dimensions & Weights

2 seats

  • Dimension: (mm) 2330 x 1488 x 1380 | (in): 91.73 x 58.58 x 54.33
  • Weight (batteries included): (kg) 520 | (lb): 1.146,4
  • Weight without batteries: (kg) 380 | (lb): 837,75
  • Wheel base: (mm) 1650 | (in): 64.96
  • Dimension & weight assembled including batteries and wooden crates:
  • Dimension: (mm) 2540 (L) x 1670 (W) x 1500 (H) | (in) 100.00 x 65.75 x 59.06 (H)
  • Platform weight: (kg) 570 | (lb) 1,256.6
  • Batteries: (mm) 880 (L) x 830 (W) x 590 (H) | (in) 34.65 (L) x 32.68 (W) x 23.23 (H)
  • Batteries weight: (kg) 215 | (lb) 474

4 seats

  • Dimension (mm): 3033 x 1488 x 1380 | (in): 119.4 x 58.58 x 54.33
  • Weight (batteries included): (kg) 570 | (lb): 1.256.6
  • Weight without batteries: (kg) 430 | (lb): 948
  • Wheel base (mm): 2350 | (in): 92.52
  • Dimension & weight assembled including wooden crates:
  • Dimension: (mm) 3240 (L) x 1670 (W) x 1500 (H) | (in) 127.6 (L) x 65.75 (W) x 59.06 (H)
  • Platform weight: (kg) 670 | (lb) 1,477.1
  • Batteries: (mm) 880 (L) x 830 (W) x 590 (H) | (in) 34.65 (L) x 32.68 (W) x 23.23 (H)
  • Batteries weight: (kg) 215 | (lb) 474



  • Technology: welded and screwed tubes
  • Material: steel S235JR – Painted frame
  • Assembled chassis weight: 105 kg (2 seats) – 130 kg (4 seats)

Steering system

  • Rack and pinion
  • Turn radius: 4m (2-seat), 5m (4-seat)
  • Power steering: optional (surcharge)

Braking system

  • Front and rear disc brakes
  • Regenerative braking configured at 10% to prevent abrupt slowdowns
  • ABS system: optional (surcharge)

Suspension systems

  • Front and rear McPherson


  • Rims: steel
  • Tires: 175/55R15 Pirelli P1 “green” tires (low rolling friction)

Safety Equipment

  • Emergency switch
  • Roll-bar not included (due to impact on final vehicle design)
  • Other mandatory safety systems depends on the final design of customer


Electric motor

  • AC asynchronous high performance electric motor
  • Rated voltage: 80Vac
  • Rated power: 19kW
  • Rated current: 235A
  • Max current: 400A (electronically limited)
  • Max power: 29,5kW @ 2500 rpm
  • Max torque: 128Nm @ 500 rpm
  • Max efficiency: 91,97% @ 5000 rpm
  • Max power factor: 0,97

DC/DC converter

  • 80/12 100W

Motor controller

  • Vector control

Reduction gearbox ratio

  • 5,8:1

Drive shaft

  • Front wheel drive

Motor controller

 Model: AC-L1 72/80 V 600A SWS
 Type Code : ACL1R60000000
 Rating Data : 72/80V 600A

According to manual found online it works with "SME Eyeplus" software, using an interconnection cable (SME Code IV049A)

To connect the Engine Controller to a PC, use a RS232 12V Serial cable (3.3v will not work). This is an example of an adapter which was successfully tested.

Link should be setup at 38400



Battery pack

  • 24 elements LIFePO4 160Ah, 82V (12,8 kWh of stored energy)
  • Single element: 3.4V, 160Ah
  • Battery life: 5,000 charges at 80% Depth of Discharge

Battery charger

  • Input: 220V 10A – Output: 80V 25A
  • Charge time: up to 7 hours at input voltage and current

Older version's datasheet.

Battery Management System

  • Max voltage: 93V
  • Phase 1: required current 100%
  • Phase 2: required current 50%
  • Balance cells phase: required current 14%
  • Passive control
Connecting to the BMS

It is possible to connect to the BMS using a USB cable (male / male, type A on both sides). The BMS uses a serial over USB protocol. Serial link speed must be set at 9600. The protocol used over this link is a custom ASCII protocol.

Specifications of the protocol, and a simple software to display the main variables available from the BMS can be found here.


Categories supported

HEAVY QUADRICYCLES (EU L7e category, middle speed) A vehicle with four wheels, other than that classified for the category L6, whose unladen mass is not more than 400 kg (550 kg for vehicles intended for carrying goods), not including the mass of batteries in the case of electric vehicles and whose maximum continuous rated power does not exceed 15 kW.

e.g. Renault Twizy 80, Nissan NMC, Tazzari Zero, Grecav, Town Life Ginevra GTB

LIGHT QUADRICYCLES (EU L6e category, US LSV NEV low speed) A vehicle with four wheels whose unladen mass is not more than 350 kg, not including the mass of the batteries in case of electric vehicles, whose maximum design speed is not more than 45 km/h, and whose engine cylinder capacity does not exceed 50 cm³ for spark (positive) ignition engines, or whose maximum net power output does not exceed 4 kW in the case of other internal combustion engines, or whose maximum continuous rated power does not exceed 4 kW in the case of electric engines.

e.g. Renault Twizy 45, Nissan NMC, Aixam, Chatenet, Ligier, Freeduck

TRADITIONAL PASSENGER CARS (M1 category) (coming soon) Power-driven vehicles having at least four wheels, used for the carriage of passengers and comprising not more than eight seats in addition to the driver’s seat.

e.g. BMW i3, Tesla Model S X 3, Smart Electric, Nissan Leaf, Renault ZOE


  • Charger : Zivan NG3 F7 LL
  • Motor AC SME (19kW, 55.7V, 247A max).
  • Batteries : LYP160AHA 12.5kWh.
  • Motor controller : AC-L1