Reviewed 13 October 2026. By MotoEbikes. Manufacturer specifications are identified below; this is buying and ownership guidance, not an independent road test.
Start with the charger supplied for your exact VARG and the electrical supply where you will use it. Stark lists a 3.3kW, 16A, 120/240V charger for the current MX 1.2, EX and SM. Its published charging times are approximately two hours on 240V and 3.5 hours on 120V. These are manufacturer figures for the specified setup, not a promise for every socket or charge session.
What to confirm before delivery
| Check | Why it matters |
|---|---|
| Exact model and charger revision | Original MX equipment and current model documentation must not be mixed. |
| UK plug, cable and approved connection | A voltage label alone does not establish compatibility. |
| Required supply and permitted current settings | The available circuit may limit charging or require suitable installation. |
| Where charging will take place | Cable routing, ventilation, weather exposure and access need assessment. |
| Current owner’s manual | Connection order, temperature limits and storage settings must match your model. |
Can you use an ordinary UK socket?
Do not assume so from the two-hour headline. A charger described as 16A is not automatically suitable for a domestic 13A connection. Ask the dealer to identify the approved UK arrangement, including any permitted reduced-current operation. Where the existing supply needs assessment or alteration, use a qualified electrician.
Do not improvise adaptors or use a cable simply because its connectors fit. The charger, protective devices, circuit and accessories must be suitable together. At a workshop or riding venue, obtain permission and the supply specification before planning a charging stop.
How long does charging actually take?
A session depends on starting charge, the amount you want to add, available power, battery conditions and the charging system’s behaviour. A partial top-up and a full recharge are different tasks. Do not convert a headline full-charge time into an exact ten-minute mileage gain.
The basic calculation is energy added divided by average charging power, with additional allowance for losses and any reduction in charging rate. Nameplate maximum power is not necessarily the average power reaching the battery throughout a session. Measure the actual start and finish percentages and elapsed time for the setup you use.
How much does a charge cost?
Cost = electricity drawn from the supply in kWh × your tariff per kWh. Metered wall energy is the useful figure because charging losses mean it differs from energy retained in the battery.
For illustration, a session drawing 6kWh at an assumed 25p/kWh costs £1.50. A session drawing 8kWh at the same assumed rate costs £2.00. These are arithmetic examples, not a measured Stark charge or a claim about your current tariff. Standing charges and any venue fee are separate.
To work out energy cost per mile, divide the measured cost of replacing energy used by the distance ridden. Include tyres, servicing, insurance and depreciation separately when comparing total ownership costs.
Battery care, storage and everyday procedure
Use the owner’s manual for your precise model and charger. Follow its connection sequence, temperature requirements, cleaning precautions and storage charge guidance. Obtain the current document through Stark Support or Technical & Tutorials and keep a copy with the bike’s records.
We do not apply an older VARG MX manual’s temperatures or storage instructions to every later EX, SM or MX 1.2. If a warning appears, a connector is damaged or the charger behaves abnormally, stop the session and have the fault assessed; do not open the battery or bypass protection.
Public chargers, generators and track paddocks
A public car charging point is not automatically compatible with the VARG’s charging equipment. Establish the supported connection and any operator requirements before relying on it. An improvised adaptor is not evidence of compatibility.
For generator use, ask Stark or the supplying dealer about the exact charger’s input and power-quality requirements, then have a suitable supply specified. A generator’s advertised peak output alone is insufficient. For track use, also ask about permitted charging areas, weather protection and circuit sharing.
A charging log worth keeping
- Model, charger identification and supply arrangement.
- Date, ambient temperature and whether the bike had just been ridden.
- Start time and battery percentage; finish time and percentage.
- Current setting and any interruption or warning.
- Wall energy if a suitable meter is installed; never add an unsuitable plug-in meter to a high-current setup.
One accurately recorded normal session will help us add a useful UK ownership example. It should not be presented as a universal charging curve. You do not need to run the battery flat for this purpose.
Sources and related advice
Charger specifications and advertised times are from Stark’s MX 1.2, EX and SM pages. For journey planning, read Stark VARG range explained. For different motorcycle systems, see our general charging guide.
Explore the Stark VARG advice hub or contact MotoEbikes in Guildford with your riding plans, model and charging arrangements.
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