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Tesla Range extender battery pack

One piece of the Tesla Cybertruck launch we didn’t see coming (nor did Tesla event planners or CEO apparently) was the Range Extender, which we are still learning more about now. But what we already know answers some questions like how Cybertruck owners expect to tow or travel long distances, especially in the cold, without charging as often.

But the 130-mile add-on battery also presents some opportunities that harken back to when Tesla demonstrated battery swap stations. And its interface to the Cybertruck even presents opportunities for other energy sources from solar to hydrogen to even petroleum generators.

Range Extender omitted during the presentation

It is hard to tell if Tesla and CEO Elon Musk were supposed to have mentioned the range extender during the admittedly haphazard and cringey presentation but it would seem like a really big deal. For one, it would get the Cybertruck acceptably close to Tesla’s originally promised 500-mile range.

Tesla’s website says the Range Extender brings the mid-level Cybertruck to “470+” miles of range. That’s an additional 130+ miles and, if the 123kWh battery pack takes the Cybertruck 340 miles (2.7 miles/kWh), the range extender would need to be an additional ~47kWh.

Range Extender or Federal Tax Credit Extender?

By making 1/3 of the 500-mile battery an external accessory, Tesla was able to keep the price just under $80,000. That allows it to qualify most owners for the $7500 tax credit which is a significant savings and could be put towards the rest of the 500-mile battery on Uncle Sam’s dime.

Also, being frank here, most owners will not need a 500-mile battery even if it makes them feel a lot safer. But the prospect of being able to add more range at a later time might allow some potential buyers to make the purchase and “see how it goes” with just 300 miles of range.

How much does the Cybertruck Range Extender weigh?

47kWh is a huge and heavy battery, one bigger than some medium-range BEV‘s batteries. We’re talking on the order of 1000 lbs. As an estimate, we can take the 454kg ~75kWh 4680 battery pack weight of the Model Y battery and figure that at about 2/3rds the size, the Range Extender will come in at 300kg or 660lbs. Or more likely around 700lbs, if you consider the interface, packing challenges, safety, ruggedness, and efficiencies of a smaller pack.

Remember, Tesla will have to build this 700lb high-density/inertia object to not come flying through the cabin in a front-facing collision. It will also affect the performance of the vehicle in the same way that putting 4 more people in the cab.

How much does the Tesla Cybertruck Range Extender Cost?

Since Tesla didn’t talk about it at the event and it doesn’t have a sticker price on the customer-facing website, we can’t be certain. However, in the website source code, the following was found:

$16,000 seems like a bit of a premium on what an external 47kWh battery would cost. Assuming Tesla has hit the $100/kWh on the 4680 cell level, that’s a cost of $4700 and another $11K for packaging, production, and a fat margin.

That price could change and hopefully come down as the scale increases and would probably be a lot more popular with towing Cybertruck owners at under $10K.

Bigger questions

So now that we can guess the size specs and price of the Cybertruck Range Extender, we can think about what it means for the vehicle.

At close to 700lbs, this isn’t something that 1 or 2 people can just install themselves. It is going to take either a hydraulic jack/forklift type of installation or a more permanent fixture that would be installed at the factory. It will also either need to have its own BMS and cooling system or tap into the Cybertruck’s heating/cooling liquids. So what I’m saying is that the interface might not just be a big DC plug.

Range Extender as a Powerwall?

In a perfect world, you could leave your Tesla Range Extender in your garage and it would act like a 3-pack of 14kWh Tesla Powerwalls, saving you from power outages and maybe earning some grid-shaving money from day to day.

Then when it was time to tow the boat up to the mountains or go on a cross-country vacation in the cold, you could “throw” it in your Cybertruck bed and use it as extra range and then as a Powerwall for the lake house.

Range Extender battery swap?

Tesla had a Model S battery swap station in California in 2015 that would allow a new battery to be installed quicker than a gas fill-up. It never went live because, in Tesla’s words, they saw that charging was getting so quick that it wouldn’t need the complexities of a battery swap soon. Additionally, not all batteries are the same, and older batteries aren’t worth nearly as much as new ones so people could be losing money on the value of their car on a swap.

The Chinese manufacturer Nio is the only current company offering a significant battery swap option for EVs.

However, if the Cybertruck becomes as popular as it initially seems, maybe it makes sense for Tesla to run some range extender battery swap stations. A quick stop with a forklift could add 130 miles of range in a few minutes. Maybe multiple batteries could be added at the same time? Put these at the base of ski mountains and the outskirts of deserts?

Or more realistically, instead of buying a Tesla Range Extender, rent one for that week’s vacation to the mountains for a fraction of the cost. These could be picked up and dropped off at Tesla stores or 3rd party outlets. Maybe a super high-power automated battery swap station like Gogoro. Maybe it is manned by super strong Tesla Optimus robots (lol).

More Range Extender options

If it is a bi-directional interface (and how else would you charge it?) it could also be used to DC fast charge other things…like the Cyberquad! Seriously though Cybertruck owners could DC fast charge electric ATVs, boats, and motorcycles a lot faster than the 9kW Level 2 power that the Nema 14-50 outlet would provide.

With Tesla’s range extender interface, one could also see the company offering different battery sizes. Maybe a 50-mile option that could be carried by a tow truck driver. Or a longer range 250-mile option? 500 miles?

Or solar? We know Tesla plans to put a solar tonneau cover into production so this could be the interface there. While this will be a microscopic amount of power at any given time, it will add thousands of miles of range over the life of the vehicle. Just don’t expect to drive on solar like a Solar Race car.

Even better, why limit it to battery packs? What if Tesla offered a 1000-mile hydrogen or *gasp* gasoline generator alternative for those way out in the sticks? Yes, I know very unlikely that it would get Elon Musk’s approval but maybe if Tesla opens the connector to 3rd parties, it wouldn’t be rocket science to deliver bespoke power options.

I can already imagine someone doing a cross-country Cannonball run with the Cybertruck where it doesn’t ever need to stop. On FSD? Elon hook us up.

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Fast charging just got sleeker: Delta’s 50kW Wallbox launches in US

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20 mins ago

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April 23, 2025

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Fast charging just got sleeker: Delta's 50kW Wallbox launches in US

Delta 50kW Wallbox
Photo: Delta Electronics

Fremont, California-based Delta Electronics just rolled out a sleek new 50kW DC Wallbox charger that’s designed for tight spaces at ACT Expo 2025.

This charger packs a punch in a surprisingly slim, 10-inch-thick, and lightweight (just 225 pounds!) casing that can be wall-mounted or set up on a pedestal. It’s specifically designed for tight spaces like urban parking lots, busy corporate campuses, or crowded fleet operation hubs.

Delta plans to manufacture these 50kW DC Wallbox chargers in Plano, Texas, keeping it local and supporting the rapid EV infrastructure growth across North America.

A 50 kW charger is at the low end of Level 3 fast charging speed, because you don’t always need to charge your car in 25 minutes. It’s the ideal charging speed for shopping, lunch, or seeing a film. Eng Taing, Delta’s senior VP and GM of energy & telecom Infrastructure, says, “Our focus is on seamlessly integrating high efficiency charging into the diverse scenarios of everyday life, including commercial operations, not just maximizing power output.”

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With a 97% efficiency rate, the Wallbox can juice up two EVs simultaneously using either CCS1 or NACS connectors. Plus, the 23-foot cable makes it easy to accommodate nearly any parking layout, eliminating headaches during installation.

Delta’s vertical integration approach means it handles everything from design to manufacturing. But it doesn’t stop at hardware; the charger also connects to Delta’s IoT platform, offering remote diagnostics, predictive maintenance, and over-the-air updates. That hopefully means fewer disruptions and smoother operations for fleet managers and EV users.

If you live in an area that has frequent natural disaster events, and are interested in making your home more resilient to power outages, consider going solar and adding a battery storage system. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. They have hundreds of pre-vetted solar installers competing for your business, ensuring you get high quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use and you won’t get sales calls until you select an installer and share your phone number with them.

Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisers to help you every step of the way. Get started here. –trusted affiliate link*

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Used EV prices fell 40%, and buyers are searching like never before

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2 hours ago

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April 23, 2025

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Used EV prices fell 40%, and buyers are searching like never before

Used EVs

More car buyers are hunting for used EVs – CarMax says searches filtered by “electric vehicle” have nearly doubled since January 2022.

CarMax saw EV searches surge in March 2022 and again in June 2024. The first spike lined up with the gas price shock after Russia invaded Ukraine, and the second came right as the Biden administration rolled out its $4,000 federal tax credit for used EVs.

The online used car marketplace’s Spring 2025 Electric Vehicle Consumer Report shows just how far used EV prices have tumbled, down over 40% between January 2022 and February 2025. By comparison, prices for gas cars, hybrids, and plug-in hybrids only slipped about 12% over the same period.

For the third year running, the Tesla Model 3 and the Model Y were in the No. 1 and No. 2 slots, respectively, from September 1, 2024, to February 28, 2025. The Chevy Bolt jumped into third place from its previous spot at No. 7 in 2024 and 2023. The Ford F-150 Lightning (7) and the Rivian R1T (10) made the top 10 for the first time, while the Tesla Model S and the Audi e-tron dropped out. The Hyundai Ioniq 5 and Nissan Leaf were at Nos. 5 and 6, and the Volkswagen ID.4 (4), Nissan LEAF (6), and the Ford Mustang Mach-E (9) made the list for the third year in a row.

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What people are trading in

For the first time ever, more people are ditching sedans and coupes for EVs than SUVs. CarMax says sedans and coupes made up 44% of all EV trade-ins, up from 36% in 2024 and just 29% the year before. It’s a clear sign that the EV switch is picking up speed across more than just SUV drivers.

When customers traded in sedans for EVs during this report’s measurement period, the most common EVs they purchased were the Tesla Model 3, Tesla Model Y, and Chevy Bolt EUV. 

The top traded-in model for an EV at CarMax was the Tesla Model 3, and those who traded in a Model 3 usually went for a Model Y. The rest of the top five include the Honda Civic and Accord, the Nissan LEAF, and the Toyota Prius. The Ford F-150 truck, the top trade-in alongside the Accord in the 2024 report, dropped off the list.

Since this is CarMax’s report, it’s of course based on data sourced from its 250 stores across the US. In 2025, Oregon beat California to become the state with the highest percentage of EV sales compared to each state’s total sales at CarMax. California has previously held the top ranking since 2023. 

The West Coast continued to dominate when it came to used EV sales. California and Washington were in second and third place, respectively. Nevada and Arizona were fourth and sixth, while Utah and New Mexico (new to the top 10 list this year) held spots five and seven. On the East Coast, New York (10) appeared on the list for a second time, dropping two spots from No. 8 in 2024. 

The newcomers include Minnesota, which jumped 24 spots in a year to No. 8, and New Jersey, which moved up six slots to No. 9.

To limit power outages and make your home more resilient, consider going solar with a battery storage system. In order to find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. They have hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use and you won’t get sales calls until you select an installer and you share your phone number with them.

Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisers to help you every step of the way. Get started here. –trusted affiliate link*

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Heybike Hauler cargo e-bike at new $1,099 low, EcoFlow multi-day power station flash offers from $349, Aiper solar pool skimmer, more

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3 hours ago

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April 23, 2025

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Heybike Hauler cargo e-bike at new ,099 low, EcoFlow multi-day power station flash offers from 9, Aiper solar pool skimmer, more

Headlining today’s Green Deals is Heybike’s Mother’s Day Sale that is taking up to $500 off e-bikes on top of offering some additional free gear, with the brand’s Hauler Cargo e-bike getting brought down to a new $1,099 low, among others. We also have EcoFlow’s final flash offers that will be running for the duration of its Mega Sale through April 15, with notable returning low prices on the RIVER 2 Pro power station, a DELTA Pro 3 solar generator bundle, an EcoCredits purchase opportunity from $1, and more. You can prep for swimming season by grabbing Aiper’s latest Surfer S2 Solar Pool Skimmer while it’s back at its $320 low, as well as gear up for camping and storm cleanup needs with Greenworks’ second-generation 40V 12-inch Cordless Electric Chainsaw at $128. Plus, all the other hangover Green Deals are in the links at the bottom of the page, like yesterday’s exclusive $2,000 in savings on EcoFlow’s DELTA Pro Ultra station at a new low price, and more.

Head below for other New Green Deals we’ve found today and, of course, Electrek’s best EV buying and leasing deals. Also, check out the new Electrek Tesla Shop for the best deals on Tesla accessories.

Heybike’s latest Hauler cargo e-bike with a 440-pound payload for up to 85 miles starts from new $1,099 low

Heybike is launching its Mother’s Day Sale through May 11 with up to $500 taken off initial e-bike prices while also offering free gear along with your purchase. Amongst the bunch, we spotted Heybike bringing its latest Hauler Cargo e-bike down to $1,099 shipped during this sale. Recently, it’s been carrying a full $1,499 price tag since the start of 2025, which we saw drop to $1,199 in February before staying at $1,399 in the sales since. Today’s deal, though, is coming in better than ever as a $400 markdown that takes things to a new all-time low price. You’ll also be getting the bonus of a large rear cargo basket that attaches to the rear rack. Head below for more.

A solid option for folks who are looking for an alternative for errand running over their car, the Heybike Hauler e-bike sports a 750W brushless geared hub motor that reaches a top speed of 28 MPH and can peak at 1,400W for inclines and better pick-up when hauling packages, groceries, and the like. There are two removable battery options here, depending on just how much travelling you plan to do, with a single 18Ah setup for up to 55 miles on a single charge with its PAS levels activated, or you can upgrade with an additional 12.5Ah battery at $300 more to increase its range up to 85 miles.

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Heybike’s Hauler e-bike sports a nice 440-pound payload capacity and even comes with foldable running boards if you end up hauling a passenger along too. And for the price right now, it also offers some solid stock features, like the hydraulic front suspension fork, front and rear hydraulic disc brakes, puncture-protected tires with fenders over each, a 7-speed Shimano derailleur, an LED headlight with an auto-on feature, an integrated taillight with braking functionality, a kickstand, the obvious rear cargo rack, and an LCD for your real-time data and setting controls.

Heybike’s other Mother’s Day Sale offers:

  • Mars 2.0 Folding Fat-Tire e-bike: $999 (Reg. $1,499)
    • 28 MPH for up to 45 miles
    • 1,000W motor (32 MPH speed) costs $100 more
    • comes with free front basket and large basket
  • Ranger S Folding Fat-Tire e-bike: $1,099 (Reg. $1,499)
    • 28 MPH for up to 55 miles
    • 1,000W motor (32 MPH speed) costs $200 more
    • comes with free front basket and large basket
  • Cityrun Urban Commuter e-bike: $1,099 (Reg. $1,599)
    • 21 MPH for up to 55 miles
    • comes with free front basket and large basket
  • Tyson Uni-Body e-bike: $1,399 (Reg. $1,699)
    • 28 MPH for up to 55 miles
    • comes with free large basket
  • Horizon Full-Suspension e-bike: $1,499 (Reg. $1,999)
    • 28 MPH for up to 55 miles
    • comes with free front basket and large basket
  • Brawn Off-Road e-bike: $1,499 (Reg. $1,799)
    • 28 MPH for up to 65 miles
    • comes with free large basket
  • ALPHA All-Terrain e-bike: $1,599 (Reg. $1,699)
    • 28 MPH for up to 60 miles
  • Hero Carbon-Fiber All-Terrain e-bike: $2,499 (Reg. $2,599)
    • 35 MPH for up to 60 miles
    • comes with free large basket
EcoFlow RIVER 2 Pro Portable Power Station

EcoFlow launches multi-day flash offers on DELTA and RIVER power stations + EcoCredits purchase from $1

As we approach the end of EcoFlow’s ongoing Mega Sale through April 25, the brand has launched its last and longest flash sale offers, taking up to 48% off three units while also offering a major EcoCredits purchase opportunity. Alongside the return of the DELTA Pro 3 bundle we saw on Friday, you can now grab the RIVER 2 Pro Portable Power Station for $349 shipped. Normally fetching $599 outside of discounts, we first saw it come down to this rate during similar flash offers in the first phase of this sale. It’s returning as a second-chance opportunity for $250 in savings, giving you a solid traveling companion at the best rate we have tracked. It’s also beating out the pricing we’re seeing from Amazon by $10.

A more ample backup solution among the brand’s RIVER series, the RIVER 2 Pro is ideal for short-term needs at campsites, on road trips, and the like, providing you with a 768Wh LiFePO4 capacity to cover your essential devices and appliances. Through its eight output ports it can deliver up to 1,600W of power, with X-boost tech allowing it to “run 80% of home appliances.” It’s a great option for those who often make last-minute plans too, as plugging it into a wall outlet regains the battery in about 70 minutes, with it also having the options for USB-C and car port recharging, as well as a max 220W solar input, which can put it back at full in 3.5 hours to 4.5 hours in sunny conditions.

EcoFlow’s other flash sale offers ending April 25:

EcoFlow’s massive lineup of Mega Sale deals will only be lasting through April 25, complete with larger EcoCredit rewards, extra savings, and plenty of low prices – don’t miss it while it’s still around!

Aiper Surfer S2 Solar Pool Skimmer

Keep floating debris out of your pool with Aiper’s Surfer S2 solar skimmer back at its $320 low

Through its official Amazon storefront, Aiper is offering its latest Surfer S2 Solar Pool Skimmer for $319.98 shipped. Only on the market for a few months now, it usually carries a $540 price tag, which we first saw drop to this same rate at the top of February, which repeated last month in Amazon’s Big Spring Sale, and has otherwise kept between $340 and $400. You can pick one up while the $220 in savings last for your pool at the lowest price we have tracked, with the price also matching direct from Aiper’s website.

Building upon the success of its predecessor, Aiper’s second-generation Surfer S2 pool skimmer has been upgraded with features like the DebrisGuard anti-leak design, an improved brushless motor, an expanded suction inlet, and a 150-micron filtration system – all to provide better performance when collecting small and large debris alike from your pool’s surface. It’s also been given a larger battery that ramps up its runtime to 35 hours, with recharging available through the onboard solar panel for sunny days or its DC adapter as a backup option.

Working alongside the brand’s algorithms, it’s been equipped with dual dToF sensors to improve its obstacle avoidance – plus, there are even four retractable anti-standing columns to keep it from getting stuck on pool steps as it works. Should the columns fail to impede any such situations, the programming here knows to use its automatic self-rescue capabilities to get it back into the water to continue on its routines. There are the usual smart controls through the companion app that you’d expect, allowing you to monitor and adjust settings with the added bonus of being able to manually steer it.

Be sure to also check out the ongoing discounts across Aiper’s robotic pool cleaners that work right alongside the above pool skimmer to keep your pool clear and swim-ready, as well as the first discount we’re seeing on the new HydroComm 24/7 Smart Pool Monitor that provides 5-in-1 testing for your pool’s pH, ORP, EC, TDS, and temperature, as well as coming solar-powered.

Greenworks 40V 12-inch Cordless Electric Chainsaw

Expand your arsenal with this 2nd-gen Greenworks 40V 12-inch cordless chainsaw at $128

Amazon is offering the 2nd generation Greenworks 40V 12-inch Cordless Compact Chainsaw for $127.99 shipped. Coming down from its usual $170 price tag, discounts have been repeating to this same rate throughout the months since July of last year, with things before then only having gone as low as $120. Today’s deal is a 25% markdown off the going rate, saving you $42 while equipping your arsenal with the latest of the brand’s 12-inch compact chainsaws.

Coming in a more compact form, this 40V Greenworks chainsaw makes a reliable companion for firewood needs at home or while camping, as well as storm cleanup with hurricane season on the horizon. Powered by the included 2.0Ah battery, it sports a 12-inch bar and chain with an auto-oiler to ensure everything remains lubricated and running smoothly, delivering up to 50 cuts on a single charge. It weighs in at just six pounds, making it easy to operate for most users, complete with a safety lock and push-button start to save you time and energy over the frustrations caused by pull-strings.

Other notable Greenworks chainsaw deals:

Best Spring EV deals!

Best new Green Deals landing this week

The savings this week are also continuing to a collection of other markdowns. To the same tune as the offers above, these all help you take a more energy-conscious approach to your routine. Winter means you can lock in even better off-season price cuts on electric tools for the lawn while saving on EVs and tons of other gear.

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