Free to use. Modular EV platform.

What is 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 (mph)


Range (miles)


Power (kW)


Speed Weight (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

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

Drive shaft
Front wheel drive

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

Battery Management System
Max voltage: 93V
Phase 1: required current 100%
Phase 2: required current 50%
Balance cells phase: required current 14%
Passive control

Categories Supported

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

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

(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


We heard your feedbacks! Because some of our major customers and partners asked us for high road keeping capabilities at higher speed (up to 130 km/h – 80 miles/h ) and higher frame stiffness and robustness (for emerging countries) which were difficult to satisfy with the first TABBY design so we decided to push forward the TABBY EVO platform which can meet those requirements.

Now it’s harder, better, faster and stronger.

Who developed it?
Roberto Chiavini: born in Assisi, studied in Perugia and learnt how to develop vehicles in the special area of Modena, cradle of some of the most famous brands in automotive and motorcycle industry like Ferrari, Maserati, Lamborghini, Pagani, De Tomaso and Ducati.

He got experience in Tazzari with the Zero, one of the best electric vehicles created in Europe on an L7e platform (heavy quadricycle) and M1 (highway legal) and Townlife L6/L7, he has also a racing background with Formula Modena, a 190km/h race legal vehicle, in design, development, structural analysis and homologation.

He joined the OSV team in 2015 and developed the evolution of OSVehicle platform.

The Project



3D CAD Design








Scale manufacturing


Get involved:

Because we believe in collaboration, feel free to participate in order to improve TABBY EVO. These are some things you could provide:



  • Modular
  • Assembly in less than 1 hour
  • Categories:
    • L6e
    • L7e
    • M1 (coming soon)
  • In production, it will be adapted to the category (weight, cost, materials)
  • Quick time to market
  • 4WD (coming soon for off-road and emerging markets)

See the evolution

2 seats version

4 seats version

1 hour assembly

3D files

Yep, 3D files are available to download for free.

version: TABBY EVO v.0.1

Released: April 2015

Licence (free for commercial use)

Creative Commons License TABBY by OSVehicle is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Based on a work at Permissions beyond the scope of this license may be available at

We are shipping

The wait is over. Now you can buy TABBY EVO online

Do you have a great idea?

Do you want to develop your car?

You can start developing on TABBY EVO today: right now we are selecting the best startup projects and partners to work and test together our platform in order to speed up the time to market.

Apply now, few slots left.

What is included
  • Frame (Chassis)
  • Suspension system (Front & Rear)
  • Steering system
  • Braking system
  • Basic controls
  • Cabling (CAN bus)
  • Two seats
  • Wheels, rims, and tires (15′)
  • Batteries (must be ordered directly from the manufacturer*)
  • BMS (Battery Management System)
  • Motor
  • Motor controller
  • DC-DC Converter
  • Battery Charger

*we recommend you buy the batteries directly from the battery manufacturer or its local representative in order to reduce costs. If you have problems in doing so we can provide you the batteries.