5 Star Rating

Home Repairs & Services EV & Hybrid Battery Systems

repairs & services

EV & Hybrid Battery Systems

EV & Hybrid Battery Systems in Colchester - Shaikly EV Specialists

Diagnosis, testing and maintenance for both EV battery systems — the high-voltage drive battery and the 12V battery that keeps everything running.

EV and Hybrid Battery Systems

Electric vehicles use two different battery systems, each serving a distinct purpose: the main high-voltage drive battery, which powers the electric motor, and the 12V vehicle battery, which supports the car’s control systems, safety features and electronics. Although they work together, they are diagnosed, tested and maintained in very different ways.

Understanding Your Battery Systems

Two Different Battery Systems

EVs use both a high-voltage drive battery and a conventional 12V battery. They work together but are diagnosed, tested and maintained in very different ways.

The High-Voltage Drive Battery

The main drive battery powers the electric motor and operates at far higher voltages than a conventional battery, managed by complex systems that regulate temperature, charging and performance.

Not Every Fault Means Replacement

Many faults relate to sensors, cooling systems or control modules rather than the battery cells themselves — so we establish what is actually wrong before any decisions are made.

The 12V Battery Still Matters

A failing 12V battery is one of the most common causes of EV breakdowns and warning messages, often showing varied or intermittent symptoms that seem unrelated.

Battery Services We Offer

High-Voltage Battery Assessment

Manufacturer-level diagnostic equipment and structured testing to identify reduced capacity, module imbalance, charging faults or software-related problems.

Fault Diagnosis Beyond the Cells

Checking sensors, cooling systems, contactors and control modules to establish the real cause before any replacement is considered.

12V Battery Load Testing

Testing the 12V battery under load and checking the charging and DC-DC conversion system that keeps it maintained.

12V Replacement & Reinitialisation

Fitting the correct battery type where needed and ensuring the vehicle systems are reset and reinitialised correctly.

Book an appointment today.

Book an appointment online in under two minutes, or call us!

get in touch

Questions, or ready to book?

Call or email us about any service, MOT, tyre, diagnostic or repair work for your electric or hybrid vehicle.

phone

01206 796657

email

info@shaiklyevspecialists.co.uk

Two branches

CO2 8JY | CO4 9TB

Name(Required)

Phone(Required)

Email(Required)

Vehicle Registration(Required)

Preferred Location(Required)

Message(Required)

FAQ

Frequently Asked Questions

What’s the difference between the main drive battery and the 12V battery?

The main drive battery powers the electric motor and moves the vehicle. The 12V battery powers the vehicle’s electronics and control systems. Both are essential, but they perform very different roles.

Can a failing 12V battery cause EV warning lights?

Yes. A weak 12V battery can trigger multiple warning messages, system faults, or prevent the vehicle from starting or charging altogether.

Does a battery fault always mean the main battery needs replacing?

No. Many battery-related faults are caused by sensors, cooling systems, software issues, or individual components rather than battery cell failure.

How do you assess the condition of a high-voltage battery?

We use manufacturer-level diagnostics, fault-code analysis, live data monitoring, and structured testing to determine battery health and identify related system issues.

Why do you use an assessment form before booking diagnostics?

It allows us to review the fault properly, confirm we’re the right specialists for the issue, and plan the most effective diagnostic approach before the vehicle arrives.

find us

Two Colchester Locations

Hawkins Road

Unit 3c Altbarn Estate, Hawkins Road,

Colchester, CO2 8JY

Mon – Fri: 8am – 5pm | Sat – Sun Closed

Severalls

38 Heckworth Close, Severalls Ind. Park

Colchester, CO4 9TB