Are E-bike Batteries Dangerous in Summer. Sun ebike battery

Are E-bike Batteries Dangerous in Summer?

Do you worry about keeping your electric bike maintained in the summer? Are you concerned about the temperature as it increases? All of your questions are answered by us!

Rising temperatures typically lead to the need to consider ways to preserve the health of your EV’s battery for a more comfortable ride. Here are some tips for managing your electric cars as the temperature rises.

Summer Battery Advice for Your Electric Bike

Here are some suggestions for maintaining your battery this summer so you can keep riding.

Protection from direct sunlight

Although you might enjoy basking in the sun, your battery is less enthusiastic. Don’t expose it to the sun for more than an hour. Even though we always advise storing your bike indoors, if it is not possible, remove the battery and keep it out of the sun, away from dirt, debris, extreme heat, and corrosive household items.

Always keep your battery out of the sun’s rays and extreme heat when it’s time to charge it. Find a place inside that is shaded and between 50 and 77 degrees. The lifespan of your battery can be extended with these easy steps. Extreme temperatures can prematurely reduce the capacity of the parts that generate the power for your ebike.

Avoid riding in extreme heat

Avoid riding your e-bike when the temperature is above 113 °F to maintain the health of your battery and its range per charge. Like many electronic devices, including the majority of cell phones, your battery will shut off when excessive heat is detected. If this occurs to you, don’t become alarmed. When the internal temperature exceeds 140 °, this takes place as part of its typical protection controls. It must cool down before being used normally again. Bring the battery inside and leave it there for about an hour. The recommended temperature range is between 50 and 77 °F.

Avoid salt and saltwater

Salt is highly electrically conductible and has corrosive qualities. As a result, we advise against using your ebike in places like the middle of the beach where you might come into contact with salt and salt water.

However, there are precautions you can take to help minimize any harm to your bike or battery if you do come across salt or saltwater. Make sure the connections are dry and clean, remove the battery, and clean the battery case and battery tray with a fresh, dry rag. After cleaning the bike frame and mechanical parts with a clean cloth dampened with fresh water, let them completely dry before reinstalling the battery. Regular maintenance, such as lubricating your chain, is always crucial, but it should be carried out more frequently when exposed to salt or saltwater is a possibility.

Regular battery inspection

Make sure the battery is only warm to the touch during charging and not hot, which is likely a sign of damage. Before you ride, you should inspect the battery terminals for rust and make sure it is securely fastened to the frame.

Always buy the appropriate replacement battery for your model if your battery does need to be replaced. Utilizing different batteries or chargers from the manufacturer could cause the battery to charge too quickly or lose capacity. Your battery may experience problems as a result of excessive heat, including severe, permanent damage.


For your summer rides, dressing appropriately will add comfort and protection. Cotton is a good material choice for hot days because it is light and airy. But the market is flooded with breathable synthetic materials that keep sweat from building up.

Purchase a quality set of cycling gloves. They absorb the sweat, keeping your hands dry. By enabling you to keep a firm grip on the handlebars throughout your ride, gloves increase your safety. Additionally, some gloves have padded palms that provide additional comfort by isolating your hands from vibration.

Cycling Plan

Even though unplanned cycling trips are frequent in the summer, preparation is always necessary. Check the forecast for the weather first. Summertime weather can be quite erratic in some parts of the world. You can take the appropriate clothing and equipment, for instance, by being aware of whether rain is forecast.

Pro-tip for trips: Remove the battery before mounting yours to a bike rack or putting it in a truck bed to provide additional protection from the elements. Doing so also saves about 7 pounds of bike weight. Store your battery in our brand-new Battery Travel Case for added security; it has space for your battery, charger, and a spare set of keys.

Don’t charge an electric vehicle in the sun.

Avoid letting your electric car charge for an extended period of time in the sun. Charging your cars in the shade is preferable because charging them in direct sunlight for extended times can damage the batteries.

These parking spaces will shield your car from the intense heat as well as during the rainy season. So it might be a long-term investment for you. The lower the maintenance costs will be over the course of using your E-Bike, the longer the battery life.

How Does A Fire Rise ?

The most popular type of batteries, lithium-ion batteries, power electric bikes. Additionally, there are two variations of these lithium-ion batteries: LFP and NMC. Since LFP (lithium ferrophosphate) has a thermal runaway threshold of 270 degrees Fahrenheit versus 150 degrees Fahrenheit, respectively, it is more stable than NMC (nickel manganese cobalt).

NMC batteries have a longer range than LFP batteries because they are denser. These batteries are more susceptible to failure, though, because of their lower thermal runaway threshold. When that occurs, the battery’s temperature increases, energy is released, and the temperature rises once more, leading to an endless cycle of temperature increases and, eventually, a fire.

Summing Up

The best time of year to ride an electric bike is in the summer. You’ll have memorable experiences from this season and avoid mishaps from happening if you pay attention to the advice in this article.

E-Bikes, Batteries and Blazes Spark Concern in NYC — Why Do They Start Fires?

A weekend fire that injured over three dozen people — and forced firefighters to use ropes to pluck people from a 20th-story window — is drawing attention to a rising concern in New York City: battery fires that can arise in the electric bikes and scooters that have proliferated here.

City officials are considering new laws after the fire department counted nearly 200 blazes and six fire deaths this year tied to problems with lithium-ion batteries in such “micromobility” devices.


Lithium-ion batteries are a Nobel Prize-winning innovation that entered the market in the early 1990s. Hailed as rechargeable, lightweight, powerful, durable and safe, the batteries have been envisioned as a key to greening the world’s energy supply by storing energy, including from the sun, wind and other renewable sources.

The technology has woven its way into many people’s everyday lives, powering phones, laptop computers, vehicles and more.

The patient count jumped again on Monday, with city officials announcing a total of 46 civilians, firefighters and police officers were injured. NBC New York’s Jessica Cunnington reports.


The batteries’ electrolyte — a solution that lets electrical current flow — is flammable, explains Massachusetts Institute of Technology materials chemistry professor Dr. Donald Sadoway. The substance was chosen for its ability to handle the voltage involved, but fires can happen if the batteries are overcharged, overheated, defective or damaged, for instance.

Over the years, problems have periodically triggered fires involving laptops, cellphones, hoverboards, electric vehicles, airplanes and battery power storage installations. A U.N. aviation agency said in 2016 that lithium-ion batteries shouldn’t be shipped on passenger planes.

Battery industry group leader James Greenberger notes that other energy sources aren’t trouble-free, and he says there’s nothing inherently unsafe about the batteries. But he said the industry is concerned about the fires lately in New York and worries that they could scare off consumers.

“This shouldn’t be happening and we need to figure out what’s going on,” said Greenberger, the executive director of NAATBatt — the North American trade association for advanced battery technology developers, manufacturers and users.

Company Recalls 400,000 LED Umbrellas Due to Fire, Burn Hazards


The city has seen “an exponential increase” in fires related to faulty lithium-ion batteries in recent years, Chief Fire Marshal Daniel Flynn said. He said there have been more deaths and injuries already this year than in the past three years combined.

“It’s a big issue,” he said at a news conference Monday, describing fires that occur without warning, grow rapidly and are tough to extinguish.

The batteries “fail almost in an explosive way — it’s like a blowtorch,” he said.

Recent e-bike fires are sparking calls for New York City to do more to keep delivery drivers safe. NBC New York’s Rana Novini reports.

Saturday’s fire in a Manhattan apartment was sparked by a malfunctioning e-bike battery that residents were attempting to charge and left unattended while they fell asleep, he said. They were trapped when the battery, plugged in by the front door, caught fire, Flynn said.

Electric bikes and scooters have become popular, non-gasoline-burning ways to make deliveries, commute and zip around a city that has promoted cycling in recent decades. For the “deliveristas” who carry restaurant takeout orders, the bikes are crucial tools of the trade.

“What these workers have learned over the years, and they know it well, is that, like any equipment, it requires the maintenance required,” said Hildalyn Colón Hernández, a spokesperson for worker advocacy group Los Deliveristas Unidos. She said many workers have used their batteries for years without a hitch.


There are different opinions. Greenberger, the industry group director, suggests there’s too little quality control on some of the largely imported batteries. Sadoway, the scientist, believes “we don’t have the appropriate protective measures” on e-bikes and scooters themselves to monitor the batteries for problems.

Colón Hernández, the delivery worker advocate, thinks there need to be tougher standards around the batteries, such as regulations for businesses that sell or service them.

than three dozen people were injured, two critically, in a fire at a high-rise apartment building in Manhattan caused by a faulty battery, fire officials said.


The Fire Department has repeatedly issued warnings and safety tips over the past year. Fire Commissioner Laura Kavanagh asked the federal Consumer Product Safety Commission in August to consider new regulations. Mayor Eric Adams pointed again to the CPSC on Monday.

“The responsibility of navigating safe and unsafe batteries on the market should not fall to hard-working New Yorkers,” the mayor, a Democrat, said in a statement.

Some city lawmakers want to take their own steps.

A City Council committee has set a Nov. 14 hearing on various proposals. Some would require public education campaigns or safety reports. Another would prohibit the sale of some secondhand lithium-ion batteries, or e-bike or scooter batteries without certain seals of approval.

A young girl has died following another fire caused by a lithium-ion battery, according to New York City officials. NBC New York’s Melissa Colorado reports.

Meanwhile, fire officials continue to urge everyone not to leave batteries to charge unattended, to check that they’re not damaged or near a heat source, and to make sure the batteries, chargers, cords and devices are all from the same manufacturer and used as instructed.

“We understand the benefits that these batteries pose to our communities, and we want to encourage use of them, but safe use,” Flynn said. “So understand that it does pose a danger, and just use them safely.”

How To Solar Charge Your eBike With Lightweight and Portable Solar Panels

Fuel costs have been climbing the past several years, with peaks reaching 7 per gallon in some areas of the US.

For many commuters, this added fuel expense is economically unsustainable. Many are turning to more cost-effective eBike transportation for their daily commute.

e-bike, batteries, dangerous, summer, ebike

But how do you efficiently charge the battery when you are in a remote area or simply want to charge in a renewable way?

Take this blog post with you!

Today’s post will cover eBike components and features, specific use cases where an eBike makes sense instead of a traditional bicycle, and how beneficial solar panels can be for charging your eBike wherever you like to ride. Additionally, I’ll walk through how to wire up a solar charge controller that I use to charge my eBike.

In the image below is my electric fat bike. It’s similar to a mountain bike but has larger, wider wheels and a more robust frame. It also has an electric mid-drive motor and a feature called pedal-assist.

Pedal-assist augments the rider’s peddling by taking up the slack using the bike’s electric motor and battery to move you along.

Using a pedal-assist electric bike for commuting means not expending your energy solely to move the bike forward and helps you get to work without looking (or smelling) like you just rode the Tour de France mountain stage.

Commuting isn’t the only activity an electric bike can help with.

My dog Snapper and I often head off on multi-day adventures using my eFat bike. I bring food, water, sleeping gear, shelter, and my ham radio gear if we get into trouble.

The load can become substantial when carrying food and equipment for myself and Snapper. Usually, that load would be pushed along 100% using my leg muscles and caloric expenditure.

This is okay until it’s not.

Hitting the performance “brick wall” is when the electric mid-drive eBike motor can help.

e-bike, batteries, dangerous, summer, ebike

While commuting or on one of our adventures when the hills are too steep or the road is too long, I can turn on the electric bicycle motor, making it easier to reach my destination, or keep it off and use it as a traditional bike.

With pedal-assist enabled, my own 100% effort becomes 90%, 80% or even a 50% reduction of my effort.

At roughly 100 kilometers or 62 miles range in pedal assist mode 1, my eBike can span most distances to my destinations and then back home, all without a recharge. Pedal-assist mode 1 is the lowest out of 5 assist settings. It provides a leisurely pace while the rider does much of the work and is also an excellent way to combine a daily workout without a morning or evening commute.

Some eBikes even have a throttle mode, allowing the motor to provide 100% of your forward motion, making carrying a heavier load more realistic on the path less traveled.

It also makes it possible to extend the range if, for some reason, you need to race against an incoming storm or unexpectedly need to find a better-protected shelter.

Unfortunately, without access to grid-tied electric outlets during a camping bicycle trip, the assistance only lasts until the battery dies!

As a content creator, my Subaru Outback provides the mobility needed for my adventure photo and video shoots. Along the way, I decided an electric fat bike could take me further (albeit not quite as fast) if I could figure out how to charge and recharge the battery at home and in the field.

Fortunately, I can use solar power to recharge the eBike battery off-grid with lightweight, portable solar panels.

In the following image, you can see my Subaru Outback and my electric fat bike side by side. While fuel were still reasonable, the Subaru was my daily driver. Naturally, I still use it for longer trips, heavier loads or when the weather is poor.

and more, instead of jumping in the Subaru for a short trip, I use my eBike without any impact on my wallet or the environment because I charge it with solar power. In fact, my eBike has not charged via the grid since early 2022.

e-bike, batteries, dangerous, summer, ebike

Today I use my eBike as transportation to and from my off-grid adventures and for getting around town for shopping, errands, and visiting friends. I even take my dog along for eBike camping trips.

My eBike Solar Charging Setup

My portable off-grid eBike battery charger combines a charge controller from Genasun and solar panels from PowerFilm Solar.

I have two different solar options that I use with my eBike. The first is two 60W Foldable Solar Panels (F16-3600) made with amorphous silicon solar material making them lightweight and flexible.

The second option is PowerFilm’s first-ever foldable crystalline panel. The 160W Crystalline Foldable Solar Panel (F3-48F28.3VKHAS) packs small and outputs a higher voltage than PowerFilm’s amorphous panels (this helps to reduce losses for higher voltage applications where a boost controller is necessary).

Here in Scandinavia, it can take 6-7 hours to fully charge the 14Ah eBike battery from flat to full, using the 160W Crystalline Foldable Solar Panel. Using a single 60W amorphous silicon panel could take up to 16 hours. Using dual 60W amorphous silicon panels take 10 to 12 hours for a full charge. Naturally, charging time can vary depending on the time of year.

When arriving home, I connect the eBike to the solar panels and solar charge controller so it can charge while it sits outside. The eBike can also be stored away with the battery removed so that you can charge the battery independent of the bike.

As I find more ways to utilize my eBike in everyday life, I am now considering a second battery. This way, one depleted battery can be on the solar charger at home while a second fully charged battery powers the eBike. This will help in the winter months when there are fewer daylight hours.

The Solar Charge Controller I Use

The solar charge controller for my eBike battery (48V Lithium-Ion 13S Hailong battery) is the Genasun Boost charge controller ( GVB-8-WP-Boost ) for the 54.2V (48v Lithium-Ion) battery pack.

The controller takes voltage from the solar panels, converting it to a voltage the eBike can use for charging.

It also protects the battery from overcharging and finds the maximum power point (MPPT), making the best use of your panels.

How To Wire The Solar Charge Controller

The Genasun GVB-8 has four wires coming out of it.

Two are for connecting the solar panel, while others link to the eBike battery.

The wires are confusing, so please pay attention (see image above).

  • Yellow wire: Solar input (Positive)
  • Black wire next to yellow: Solar. (Negative)
  • Next black to left of solar. Battery Negative
  • Next black wire on left: Battery Positive

Anderson Powerpole connectors are perfect for connecting the charge controller and eBike battery.

My eBike is a GZR Raw and uses a 48V Hailong battery to power a 250W Bafang M-Series (integrated Mid-drive) motor.

Wiring the Genasun charge controller for the Hailong 13S4P battery was straightforward.

I used the same charging port for off-grid charging as the stock AC charger when charging from home.

I added modular Anderson power pole connectors to the charge controller and the eBike’s battery charging cable.

This makes plugging in and swapping out simple, whether from home or during an off-grid adventure.

Whatever connectors you choose, be sure the individual wires don’t touch each other during connector installation.

Also, remove the battery and charge controller from any power source while connecting.

Solar Charging Your eBike

You will need a similar but unterminated version of your AC charging cable to charge the battery. We will add the Anderson Powerpole cables to the unterminated DC charging cable on the unterminated end.

The DC charging cable for the Hailong 13S4P Lithium-Ion pack looks like this.

To charge the battery, I recommend removing it from the eBike.

Place the battery on a dry surface away from sources of moisture and remove any other connections from the battery.

Assuming you have already sourced an unterminated cable for your DC charging, plug your charging cable into the battery port of the charge controller.

Do not plug the solar panel in just yet. First, connect the male end of your charging cable to the charging port of your eBike battery.

You should see a green light illuminate the charge controller when connected, then blink green every second while the battery remains connected to the charge controller. It is now safe to plug in the solar panel.

If you get a red light illumination on the charge controller, the battery or charge controller is plugged into the incorrect port, or the polarity of the connection is backward.

If you don’t see a green or red light illumination on the charge controller, the fuse is probably blown.

Remove the fuse cover on the battery lead of the charge controller, then inspect the fuse with a multimeter.

If the fuse was blown, replace it with an identical fuse. Recheck your charge controller, battery connections, and polarity before plugging anything into the charge controller or battery again.

Remember to always connect your solar panel to the charge controller as the last step in charging. Remove the solar panel before the battery is disconnected from the charge controller when charging is complete.

Solar Charging Other Types of Batteries

If your battery is not configured the same way as the Hailong battery (for example, the 3-pin Bosch eBike battery), you can still charge your eBike battery off-grid with solar panels.

This video describes the connections required for charging Bosch eBike batteries.

Fuel costs have been climbing for the past several years, and for many commuters, this added fuel expense isn’t sustainable.

eBikes are a great way to get around, get quality exercise, and go further than you could with a conventional bicycle. This, combined with a lightweight, portable solar charging solution, makes this mode of transportation sustainable and efficient!

If you want to learn more about my particular setup or how to create yours, please don’t hesitate to reach out.

About Julian White

Julian White, aka OH8STN, is a YouTuber, blogger and retired broadcast engineer.

His blog and popular YouTube videos share education and adventures with the off-grid ham radio and emergency communications communities.

Take this blog post with you!

Summer Weather Tips for Your Electric Bike Battery

There’s no better way to enjoy summer than with an ebike. Whether you’re visiting with old friends for the first time in ages or swinging by some of your favorite lunch spots, it’s a safe bet that you’ll be spending a lot of time on two-wheels.

With all of the summer adventures ahead of you, here’s a few tips to help keep your battery healthy—and keep you up and riding all summer long.

Protect Your Battery From Direct Sunlight

You might like soaking up the rays, but your battery’s less enthusiastic. Avoid leaving it in direct sunlight for more than an hour.

While we always recommend storing your bike inside, if that is not possible, detach the battery and store it in a cool, dry place away from direct sunlight, dirt, debris, high temperatures, and corrosive household items.

When it comes time to charge your battery, always keep it away from direct sunlight and high temperatures. Find a spot indoors that’s shaded and between 50 °F–77 °F.

These simple steps can help maintain your battery’s lifespan. Extreme temperatures can wear down the components that are used to generate power for your ebike, leading to premature capacity loss.

Don’t Ride in Extreme Heat

To keep your battery healthy and preserve its range per charge, avoid riding your ebike when it’s above 113 °F.

Like a lot of electronics, including most cell phones, your battery will protect itself from overheating by shutting down when it’s too hot. If this happens to you, don’t panic. This is part of its normal protection controls and happens when the internal temperature rises above 140 °.

Before normal use can continue, it will need to cool down. Take the battery to an indoor environment, ideally one that’s between 50 °F–77 °F, for roughly one hour.

Avoid Salt and Saltwater

You may find a bit of ocean spray on a summer day refreshing, but it’s bad for your battery.

Salt has corrosive properties and high electrical conductivity. As such, we advise against riding your ebike in areas where you’re likely to encounter salt and saltwater, like directly on the beach.

However, if you do come across salt or saltwater, there are steps you can take to help minimize any damage to your bike or battery.

Remove your battery, wipe down the battery case and battery tray with a clean dry rag, and ensure the connections are dry and clean. Then use a clean rag dampened with fresh water to clean the bike frame and mechanical components and let them dry completely before putting the battery back on. Make sure to avoid spraying water directly into electrical components, like your display or battery tray.

Regular maintenance, like lubricating your chain, is always important but should be practiced more frequently when there’s the possibility of salt or saltwater exposure.

Pro tip: We know it’s sometimes difficult to detect exposure, but you can generally tell when the bike has encountered salt or saltwater by the white, chalky residue that salt leaves behind.

Inspect Your Battery Regularly

Check the battery terminals for signs of corrosion, which can look like a green dust or film, and make sure that the battery is merely warm to the touch during charging and not hot, which is a likely sign of damage.

Before you ride, inspect the battery to ensure that it is securely locked to the frame.

If your battery does need to be replaced, make sure that you purchase the right replacement battery for your model directly from Rad Power Bikes, as they were built with extra durability in mind, and Rad battery and charger are designed to work together seamlessly.

Switching it up and using third-party batteries or chargers could result in the battery being charged too fast or losing capacity. Too much heat can land your battery in trouble, including major, irreparable damage.

Travel Smart

Have you ordered our all-new RadRover 6 Plus? A Battery Terminal Cover is an easy way to safeguard your bike’s connections on long trips.

Who wouldn’t want to bring their electric bike on a road trip? When you strap yours to a bike rack or place it in the back of a truck bed, remove the battery as an added safeguard against the elements and by removing the battery you remove roughly 7 pounds of bike weight, too.

For extra peace of mind, store your battery in our all-new Battery Travel Case—it fits your battery, charger and spare set of keys.

Got all that? When used as directed, your ebIke battery can provide years of reliable power. Just remember to avoid extreme weather, direct sunlight, and salt or saltwater wherever possible. And, as always, don’t forget to take your battery off when transporting your bike in the open-air and always keep an eye out for the first signs of damage.

For additional information, check out these tips on maximizing your battery life, riding in warm weather, and our comprehensive online help center. And to safeguard your battery when you’re on the go, check out our new Battery Travel Case.

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