The quiet revolution on commercial vehicle roofs – vehicle solar panels are reducing lead-acid battery replacements and extending their lifespan according to Genie Insights’ MD Matt Reeve  

For decades, lead-acid batteries have been the workhorses of the automotive industry, however battery failure remains one of the most common causes of vehicle breakdowns, with many batteries being replaced long before they reach their maximum potential lifespan. Vehicle solar panels are increasingly helping fleets address this problem.

Today, vehicle-mounted solar panels are helping to change that narrative by maintaining battery charge levels, reducing deep discharge events and significantly extending battery life while reducing the number of batteries that need replacing.

Fleet downtime caused by dead batteries can result in lost productivity, delayed deliveries, and expensive roadside assistance calls.

Solar charging solutions provide a low-cost preventative measure. Many fleet operators are now exploring roof-mounted solar systems not only to support auxiliary equipment but also to maintain battery health and reduce avoidable battery failures.

Lead-acid batteries naturally degrade over time, but several factors can dramatically accelerate this process:

• Prolonged periods of low charge.
• Deep discharges.
• Sulfation of battery plates.
• Parasitic electrical loads while parked.
• Infrequent vehicle use.
• Extreme temperatures.

Along these, sulfation is particularly damaging which occurs when lead sulfate crystals build up on the battery plates during periods of undercharging. As sulfation increases, the battery loses capacity, struggles to hold charge, and eventually fails.

Many modern vehicles continue drawing power even when switched off. Alarm systems, tracking devices, control modules, and onboard electronics can gradually drain the battery over days or weeks. For vehicles that spend extended periods parked, this often leads to chronic undercharging and premature battery replacement.

Vehicle solar panels convert sunlight into electrical energy that continuously tops up the 12 or 24V battery throughout daylight hours. Even relatively small solar panels can offset the vehicle’s standby power consumption and maintain healthy charge levels.

This continuous trickle charging provides several important benefits:

1. Preventing Deep Discharge

A fully charged battery experiences significantly less stress than one that repeatedly falls below recommended charge levels. Solar panels help maintain an optimal state of charge, reducing the likelihood of deep discharge events that shorten battery life.

2. Reducing Sulfation

Because solar systems keep batteries closer to full charge, the formation of harmful sulfate crystals is minimised which means improved battery performance and a longer service life.

3. Supporting Seasonal and Infrequently Used Vehicles

Urban delivery vehicles including those responsible for final mile deliveries and school and college minibuses and welfare vehicles are just some of those vehicles where solar charging helps maintain battery health without requiring connection to mains power.

4. Compensating for Parasitic Loads

Modern vehicles can draw a surprising amount of standby current. Solar panels offset these small but continuous loads, preventing gradual discharge while the vehicle is parked.

5. Extending a Battery’s Average Lifespan

The average automotive lead-acid battery typically lasts between three and five years under normal conditions, but batteries frequently left partially discharged often fail much sooner. By helping to maintain a healthier battery state of charge, solar maintenance charging can extend battery lifespan, with batteries often remaining serviceable beyond five years, particularly in applications where vehicles spend long periods unused. While solar charging cannot eliminate natural battery ageing, it can significantly slow the degradation caused by poor charging habits and inactivity.

For fleet operators, this can translate into measurable savings as reducing battery replacements by just a small percentage across thousands of vehicles can deliver substantial cost reductions in both parts and maintenance labour. 12V and 24V batteries typically cost on average £125 and £300 to replace but it’s the vehicle downtime which is the costly impact for fleets of a battery failure. Recently Mercedes-Benz Vans UK calculated that it costs fleets £1,172.20 per day for every van out of action and more for trucks.

Every lead-acid battery that avoids premature replacement contributes to sustainability goals. Although lead-acid batteries are highly recyclable, extending battery life remains more environmentally beneficial than replacing batteries more frequently. By helping batteries last longer, vehicle solar panels reduce the overall demand for battery production and recycling activities.

Genie Insights has supplied more than 15,000 vehicle solar solutions on LCVs, trucks and reefer trailers in the last few years, incorporating UK-manufactured solar panels from MIPV.  Demand from operators looking to reduce vehicle downtime continues to rise. As vehicles become increasingly connected and dependent on electronic systems, battery maintenance is becoming more critical than ever.

Even conventional internal combustion vehicles now contain dozens of modules that continue drawing power after the engine is switched off. Therefore vehicle-mounted solar charging will become an increasingly common feature across commercial fleets.

In Summary

Vehicle solar panels are proving to be much more than a renewable energy accessory. By maintaining healthy battery charge levels, they are helping to significantly extend the lifespan of lead-acid batteries.

The result is fewer battery failures and unnecessary battery replacements, lower maintenance costs, and a reduced impact on the environment. Battery performance is also maximised as fleets get more value from every lead-acid battery installed.

As the commercial vehicle and fleet industries continue their shift towards smarter, more energy-efficient technologies, vehicle solar panels are emerging as an important tool in the ongoing effort to improve reliability, reduce waste, and extend battery life.

Solar could reduce overall European electricity demand equivalent to powering more than four million homes

Genie Insights is seeing increased demand from UK fleets to fit solar to vans, trucks, and trailers

Solar addresses the growing challenge of increasing demand on vehicle battery power from ancillary systems and equipment

Recent European research commissioned by the European Commission’s Directorate-General for Mobility and Transport (DG MOVE) has highlighted the significant potential of vehicle-integrated solar technology.

And with over 15,000 solar panels fitted across vans, trucks and refrigerated trailers throughout the UK and Europe, Genie Insights has welcomed the research findings.

The findings reinforce a principle that Genie is already seeing embraced by UK commercial vehicle and trailer fleets that the future of fleet electrification is not simply about larger batteries and more charging points, it is also about generating and managing energy more intelligently on the vehicle itself.

The findings come from the SolarMoves project, which was commissioned to better understand how vehicle-integrated photovoltaic (VIPV) technology could help reduce charging demand and ease pressure on Europe’s electricity grids as transport continues to electrify. It suggests widespread vehicle solar adoption could reduce demand on Europe’s electricity grid by 15.6TWh (Terawatt-hours) annually – enough electricity to power more than four million homes for a year.

Delivered by a consortium led by TNO, an independent Dutch applied research organisation, the project examined the potential contribution of vehicle-integrated solar across a range of vehicle types and operating environments.

As onboard electrical demands continue to increase, fleet operators are facing a growing challenge with vehicle systems such as telematics, cameras, safety equipment, refrigeration units and connected technologies increasing demands on vehicle batteries. At the same time, operators are under pressure to maximise vehicle uptime, improve operational efficiency and reduce energy consumption.

Vehicle-integrated solar offers a practical way to address these challenges by capturing available energy directly from the vehicle’s surface and using it to support onboard electrical systems.

A specialist provider of vehicle-integrated solar and onboard energy solutions for commercial vehicle fleets, Genie Insights has seen first-hand how onboard solar can support battery health and help fleets such as Network Rail and BT manage growing onboard energy demands. They appreciate that reducing energy demand at source and making better use of available renewable energy have an important role to play to support their ambition to reduce vehicle emissions.

Matt Reeve, Managing Director of Genie Insights said: “Electrification is often framed as a challenge that can only be solved through larger batteries and expanded charging infrastructure. While those elements are important, we believe there is an equally important opportunity to generate energy where it is needed.

“Commercial vehicles spend every day exposed to daylight and equipped with vehicle-integrated solar allows operators to capture some of that energy and put it to work supporting onboard systems, improving reliability and reducing unnecessary demand on vehicle batteries.

“Having deployed more than 15,000 systems across commercial fleets it’s encouraging to see independent European research highlighting the potential of an approach that many UK fleets are already successfully adopting today.”

The significance of the SolarMoves findings is not simply the scale of the potential energy generation. It represents a fundamental shift in how vehicles are viewed within the energy ecosystem.

As vehicle technology continues to evolve, Genie Insights believes that integrated energy solutions combining solar generation, battery technology and intelligent energy management will play an increasingly important role in supporting reliable, efficient and resilient fleet operations.

Click on this link to download the full report

Solar panels on the roof of refrigerated trailers (reefers) are now a common sight on UK roads. Operators are fitting them to provide a trickle charge to keep the transport refrigeration unit battery topped up and to extend the life of the battery as it copes with increased parasitic draw from telematics, temperature monitoring systems, and fridge controllers.

Solar power and reefer trailers work hand in hand with each other, as the more power they need to keep goods cool in the summer, the more power panels can generate from longer daylight hours.

Genie Insights has supplied and installed over 7,000 solar panels on reefer trailers, including some of the UK’s leading refrigerated transport operators and supermarkets. Operators go for the high-voltage 50W panels, and this approach is working as Genie reported a zero percent fridge battery fail rate in vehicles fitted with its panels in 2025.

For the cost of a service callout, solar panels can be supplied and installed on a reefer trailer roof, and once in place, they look after themselves. In line with the trailer’s three or six-month servicing schedules, a technician simply hooks up to the solar panel controller via Bluetooth to check performance and health.

Solar charge controllers and inverters use a technique called Maximum Power Point Tracking (MPPT) to extract maximum power from solar panels by dynamically adjusting the electrical operating point as sunlight conditions vary. MPPT optimises voltage and current, particularly in cloudy or shaded conditions, and by doubling the cells on panels by increasing surface area, Genie has further boosted panel productivity to cope with low light conditions.

Two big solar growth areas currently are on electric trucks and rigid trucks working in the catering and food service industries.

Genie is fitting larger solar arrays of up to 300W to 18-tonne rigid trucks in the food service sector for companies such as Reynolds Catering and Sysco, as their 24V batteries come under increased stress from ancillary equipment such as tail lifts and air curtains drawing power from the vehicle battery. These vans and trucks operate on short stop start journeys which puts increased stress on the fridge motor, the vehicle battery, and alternator, which is where solar energy comes into its own by keeping vehicle downtime to a minimum.

To find out how Genie Insights can help protect your fleet from unnecessary callouts and battery-related breakdowns, contact us to discuss the right solar solution for your operation.

info@genieinsights.com 

As the UK’s commercial vehicle sector continues its shift towards electrification, fleet operators are discovering that the road to net zero isn’t just about the size of the battery pack or the range on a single charge. A far smaller component — the humble 12V battery — is fast emerging as one of the most significant factors in keeping electric light commercial vehicles (eLCVs) on the road.

When the 12V battery fails, so does the van. Locks won’t release, safety systems don’t initialise, and the vehicle becomes completely inoperable — a phenomenon commonly known as “bricking.” For fleet operators managing hundreds or even thousands of eLCVs, this is more than an inconvenience. It means lost working hours, frustrated drivers, customer disruption, and mounting costs.

In the last 18 months, several of the UK’s largest and most forward-thinking fleets — Centrica, Network Rail, BT/Openreach, among them — have turned to a simple but effective solution: solar power.

Solar on the Move

Solar technology has long been associated with static infrastructure and domestic energy, but its use on vehicles has evolved rapidly. One of Genie Insights’ most popular products is a discreet 50W solar system specifically designed for eLCVs. A small solar panel mounted on the roof can continuously feed the 12V battery, preventing parasitic drain and extending the vehicle’s operational uptime — particularly in low-mileage, stop-start, or idle-heavy duty cycles.

“Solar isn’t just a sustainability measure; it’s now a reliability measure,” explains Matt Reeve, Managing Director at Genie Insights, a company that has been quietly supplying solar systems to many of the fleets leading the charge in eLCV deployment. “Electric vans are incredibly capable, but their reliance on a small auxiliary battery can create real-world issues. Solar solves that problem in a way that’s simple, autonomous, and proven.”

Quietly Credible

While some companies in the space have built their profile through marketing, Genie Insights has taken a more understated approach. Over six consecutive winters, their systems have been tested in live fleet conditions — producing data that consistently demonstrates reliability and performance. More than 10,000 solar kits supplied by Genie Insights are now in operation across the UK and Europe, a milestone that reflects both the technology’s maturity and the growing trust among fleet decision-makers.

“We’ve never been interested in over-claiming,” says Reeve. “The fleets we work with make decisions based on evidence, not hype. So our focus has always been on proving performance through data, compliance, and long-term delivery.”

That focus on quality and compliance is central to Genie Insights’ approach. Each of its solar kits comes with a range of international quality standards, including IEC and ISO 9001 accreditation and meets with Whole Vehicle Type Approval requirements — credentials that are becoming increasingly critical as leasing companies and vehicle converters look for products that meet OEM-level integration and legislative standards. Every kit is also designed to withstand the demanding conditions of commercial transport – from vibration and shock resistance to full water and dust protection.

Fleet Electrification’s Next Frontier

As fleets scale up their electrification programmes, solar is now being recognised as a small but crucial enabler of efficiency and uptime. The technology helps bridge the operational gap between theory and reality — between ambitious sustainability targets and the daily demands of vehicle availability.

“There’s lots of talk about charging networks and vehicle range in the EV adoption narrative,” says Reeve, “but the conversation also needs to include how vehicles behave in the real world. A van parked up for a week at a depot still consumes power. A solar system ensures it’s ready to go when the driver turns the key. That reliability is what keeps the transition to electric moving forward.”

Beyond eLCVs, the technology is gaining ground in refrigerated transport, municipal fleets, and specialist vehicles, where auxiliary power demand is high and downtime is costly. For many operators, solar is no longer experimental — it’s a practical, low-maintenance way to protect assets and strengthen sustainability performance simultaneously.

A Turning Point for Solar in Transport

As more leasing providers and fleet management companies — such as Novuna and Holman — integrate solar into their conversion specifications, the technology is moving from optional add-on to operational standard. In an environment where reliability, compliance, and sustainability now sit side by side, solar represents a rare win-win for all three.

“We’re reaching a point where solar will be viewed in the same way as racking or telematics,” Reeve predicts. “It’s just part of the fit-out. And that’s exactly how it should be — invisible, reliable, and always working in the background.”

For a technology that’s been quietly powering the UK’s most advanced fleets for years, that visibility may finally be about to catch up.

Find out more about our 12-volt EV battery maintenance solution.

When our customers set us a challenge to develop a compact solar solution for 24V batteries, we got to work!

What Our Customers Asked For

A solar solution to prevent battery failures caused by power-hungry in-cab accessories like microwaves, kettles, and fridges taking a draw from the 24v battery system.

The Key Ingredients

• Compact size that could be fitted to an air deflector.
• Undermount connectors to maintain aerodynamics.
• High voltage output to allow continuous trickle charge through winter months.
• Rapid ROI – Avoid costly flat battery callouts to pay for itself within one year.

What We’ve Delivered

In collaboration with MIPV, we’ve designed a 75W high-voltage solar panel measuring just 942 x 674 mm!

With almost 10,000 of our 50W high-voltage panels for 12V batteries already installed, this latest innovation builds on our proven success in helping fleets improve reliability, reduce maintenance costs, and stay on the road.

 

Today marks a proud milestone for Genie Insights as we officially launch a new under-mounted high-voltage CIGS solar solution, specifically designed for the electric light commercial vehicle (eLCV) market. This innovative solar panel system addresses a critical need, offering dependable auxiliary power to an electric van’s 12-volt battery, through cutting-edge technology engineered for optimal performance in winter and challenging conditions.

The latest evolution of the established Genie Insights system, powered by MIPV technology, is its new under-mounted design, which offers both aesthetic and functional advantages. Its placement above the van’s windscreen not only maintains a clean vehicle profile but also enhances durability under daily wear.

The Genie Insights solar solution comes with extensive certification, including IP67, ECE R10, and rigorous fire, vibration, and shock tests, giving peace of mind over its safety and capability. It has also earned whole vehicle type approval, and the solar product supply chain has been rigorously ethically certified.

Delivering over 30 volts (VOC) in a compact design, the solution discreetly harnesses sunlight to deliver exceptional battery support. With more than 7,000 units already installed, and many having successfully completed three winters, the Genie Insights panel has proven ability to out-perform anything else on the market in the toughest UK climate conditions. 

Maximise the efficiency and resilience of your electric fleet with Genie Insights solar solutions. For new installations or retrofit options, please contact your leasing company, van converter or body builder, or contact us directly.