Fleet telematics: how much could your fleet save?

Eco-driving saves 3 to 7% of fuel on a petrol or diesel fleet when drivers get feedback on their driving. The reference meta-analysis (Sanguinetti et al., 2020, 17 studies) measures 6.6% on average, 7% for professional drivers and 8% when feedback comes with rewards. Over a year in real conditions, the effect falls back to 3 to 5% if nobody follows the scores (Energy Saving Trust, European ecoDriver project). The calculator uses 4% as the cautious case and 6% as the realistic case.

Yes, and in town the gain is much larger than in a petrol or diesel car. In a study of more than 500 tests published in 2025, eco-driving cut consumption by 30% in town in an electric vehicle, against 11% in a combustion car (Miqdady et al.). An electric car calls for a new way of driving: anticipate to let regenerative braking recharge the battery, and moderate speed, because driving at 80 mph instead of 70 mph uses around 20% more energy. Over four years of real-world data, driving style changes an EV's consumption by up to 16% (Al-Wreikat et al., 2021). The calculator uses 8% as the cautious case and 12% as the realistic case.

Yes: regular feedback on driving reduces risky behaviour, and therefore claims. A randomised trial published in 2026 with 1,449 drivers measured 11 to 13% less speeding and 16 to 25% fewer harsh braking and acceleration events (Ebert et al., Accident Analysis & Prevention). In fleets fitted with recorders, accidents fell by 15 to 30% (TRL for the DfT, 2015). The result depends on how involved the fleet manager is: the calculator uses 10% as the cautious case and 15% as the realistic case.

Expect roughly 5p to 15p per excess mile depending on the leasing company, more on premium vehicles. In the UK, 12 to 17% of returned cars pay an excess mileage charge, £586 on average (FN50 survey 2024). Spotting the drift during the contract lets you reassign the vehicle or renegotiate the mileage before it goes back.

No. Voltaback gets the data directly from the connected vehicle, with no black box and no installation. Almost all recent vehicles are compatible, petrol and diesel included. Vehicles from before 2020 can be harder to connect depending on their equipment.

Send us your vehicle list (make, model, year): we test the compatibility of each one, free of charge, before any commitment. You receive the list of compatible vehicles and the savings recalculated for those vehicles only. Almost all recent vehicles are compatible, petrol and diesel included; some vehicles from before 2020 may not be, depending on their equipment. Request a compatibility test.

No. The company never receives its drivers' geolocation, in line with the ICO's guidance on monitoring workers. It sees mileage, fuel or energy use, driving scores and alerts. Voltaback is ISO 27001 certified and hosts data in the European Union.