Covering every roof with solar could supply 2/3 of global electricity – study
If the world covered every suitable roof with solar panels, it could supply 2/3 of humanity’s total electricity consumption – allowing the globe to transition completely off of fossil electricity generation, according to a new study out of the University of Sussex.
The study examined satellite data to determine the total suitable roof area around the planet which could be used for rooftop solar panels. It took into account roof slope, shading from other buildings, and so on.
It found that rooftop solar could provide a total of 19,483TWh of electricity, which is about 2/3 of global electricity use (which was 29,664TWh in 2023).
This total is actually more than the amount of electricity the world currently generates from fossil fuels – that number was 17,718TWh in 2024, driven mostly by coal and methane, two highly polluting sources.
Thus, if all of the world’s roofs were covered with solar panels, all of current fossil fuel electricity generation could be eliminated, taking a big chunk out of the unhealthy pollution created by human activities.
Certain regions are seen as more ripe for deployment of solar panels, like East Asia which has a large percentage of the world’s building stock (due to the region’s high population), and Africa where despite low housing stock, solar penetration is currently very low and solar capacity is high.
In total, the study says that this move alone could reduce global temperatures by 0.13C. While that number doesn’t seem too large, it’s a big chunk of the 1.5C warming “budget” that scientists have determined the world has to work with – and every bit of movement past that number risks additional cascading effects that will make the world less livable for humans and other species, and cause more catastrophic effects like we’re already seeing as a result of the fossil fuel industry’s operations around the globe.
The study does include a caveat that as world temperatures continue to rise, this could make certain types of solar panels less effective, leading to a drop in total generation capacity. Thus, the more we confront climate change now, the more effective this tactic will be.
However, this effect is also balanced by the potential of solar panels to be deployed more effectively by optimizing tilt angles. The study’s base case assumes flat horizontal installations – but if optimal tilt angles or solar tracking was used, the panels could be up to 39% more effective. This means if the world covered every roof with sun-tracking panels, it couldn’t just cover 2/3 of electricity production, but all of it.
It also doesn’t cover the potential of large grid-tied solar projects, just rooftops. If we used certain desert land for solar plants (which could regenerate desertified locales), that only adds to the world’s solar potential.
But we have only compared these numbers to current electricity use. The world does use energy for lots of other things – and one of the largest chunks of this is oil for transportation. As global transportation shifts rapidly to electrification, this will mean electricity use will go up significantly (though total energy use for transportation will go down – since EVs are much more efficient than gas cars).
So while rooftop solar may be enough for our current electricity needs in an ideal situation where every rooftop is covered, there will still be other sources needed to cover the rest of the shifting landscape of electricity use. Ideally, those sources will be clean – which shouldn’t be hard, given that renewables are cheaper than fossil generation.
Further, solar is less suitable in some areas than others, and for certain tasks (such as the obvious nighttime electricity use), so electricity storage (either provided by EVs, home battery systems, or grid storage) or other low-carbon generation methods like wind, hydro or nuclear still have a place, particularly in instances when they have cost advantages.
Electrek’s Take
Among some governments’ efforts to make energy more expensive and harmful to your health, it’s nice to have some good news sometimes.
This study provides that news, showing that the roofs above our heads, which currently provide no active benefit (beyond the passive benefits of heat retention, shelter from elements and so on), could be leveraged without having to build any additional structures or use any additional land, and could cover a huge portion of our current energy use.
It’s something that has been estimated by advocates many times before, but now we have a study showing just how effective rooftop solar can be.
Not to mention that it can help you save money on your energy bills, while you contribute to solving the biggest problem humanity has ever had to confront (and hey, lookie here, Electrek even has a handy affiliate link to help you find out how much money you can save… isn’t that nice!)
If you’re considering going solar, it’s always a good idea to get quotes from a few installers. 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. It has 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.
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The 2025 Hyundai IONIQ 5 got a major glow up with extra driving range, a sleek interior and exterior facelift, and even Tesla Supercharger access with an added NACS port. With leases starting at just $179 per month, the Hyundai IONIQ 5 might be your best bet to get into an EV right now.
How much does the 2025 Hyundai IONIQ 5 cost to lease?
Hyundai upgraded its best-selling electric SUV in every way possible for the 2025 model year. The 2025 IONIQ 5 can drive up to 318 miles on a single charge, recharge from 10% to 80% in under 20 minutes, and is available starting at just $42,500.
After cutting lease prices last month, the 2025 Hyundai IONIQ 5 was available to lease for as low as $179 per month.
The offer was set to end on July 7, but Hyundai extended it through its new “Hyundai Getaway Sales Event.” The 2025 Hyundai IONIQ 5 SE Standard Range model is still available for lease, starting at just $179 per month.
That’s for the base version, which has a range of up to 245 miles. The offer is for a 24-month lease with $3,999 due at signing.
The long-range SE RWD variant, with a driving range of up to 318 miles, can be leased for as little as $199 per month. Upgrading to the AWD model will cost $249 per month. You can even snag the off-road XRT variant for $299 a month right now.
Hyundai upgraded the IONIQ 5 with a sleek facelift, adding to its already bold design. Inside, the 2025 IONIQ 5 features a redesigned center console, steering wheel, and HVAC control system based on driver feedback.
It also features a more powerful, next-gen infotainment system. The setup includes dual 12.3″ driver display and infotainment screens with standard wireless Apple CarPlay and Android Auto, voice-recognition, and more.
If you’re looking for something a little bigger, Hyundai’s three-row electric SUV, the IONIQ 9 (Check out our review), is listed for lease starting at just $419 per month.
| 2025 Hyundai IONIQ 5 Trim | EV Powertrain | Driving Range (miles) | Starting Price* | Monthly lease price July 2025 |
| IONIQ 5 SE RWD Standard Range | 168-horsepower rear motor | 245 | $42,500 | $179 |
| IONIQ 5 SE RWD | 225-horsepower rear motor | 318 | $46,550 | $199 |
| IONIQ 5 SEL RWD | 225-horsepower rear motor | 318 | $49,500 | $209 |
| IONIQ 5 Limited RWD | 225-horsepower rear motor | 318 | $54,200 | $309 |
| IONIQ 5 SE Dual Motor AWD | 320-horsepower dual motor | 290 | $50,050 | $249 |
| IONIQ 5 SEL Dual Motor AWD | 320-horsepower dual motor | 290 | $53,000 | $259 |
| IONIQ 5 XRT Dual Motor AWD | 320 horsepower dual motor | 259 | $55,400 | $359 |
| IONIQ 5 Limited Dual Motor AWD | 320-horsepower dual motor | 269 | $58,100 | $299 |
To sweeten the deal, Hyundai is throwing in a free ChargePoint Level 2 home charger with the purchase or lease of a new 2025 IONIQ 5 or 2026 IONIQ 9.
Both the 2025 IONIQ 5 and 2026 IONIQ 9 are built at Hyundai’s new EV plant in Georgia. The current lease offers include the $7,500 federal EV tax credit, which is set to expire at the end of September. Hyundai’s new deals are available through September 2, 2025.
Ready to test one out for yourself? We can help you get started. You can use our links below to find deals on the Hyundai IONIQ 5 and IONIQ 9 near you.
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Environment
Tesla Semi efficiency improves in real-world trucking test covering 4,494 miles over 3 weeks
The Tesla Semi, Tesla’s electric Class 8 semi-truck, saw its efficiency improve in a new real-world trucking test covering 4,494 miles over three weeks.
The Tesla Semi underwent significant changes over the years of delays.
Tesla officially unveiled the “production version” in 2022, but the vehicle never entered volume production. It is expected to finally happen at the end of the year at a new factory in Nevada.
When unveiling the “production version”, which turned out not to be the final production version, Elon Musk said that the Tesla Semi has an efficiency of 1.7 kWh per mile.
In September 2024, Tesla reported improvements in its own fleet after covering 250,000 miles. It claimed to be achieving 1.6 kWh per mile.
Last year, two Tesla Semi customers got closer to what Musk claimed in 2022. DHL got 1.72 kWh per mile in their own test, and Saia got 1.73 kWh per mile.
Now, Tesla Semi appears to have improved quite a bit in a new real-world test by logistics company ArcBest.
The company claims to have put Tesla Semi through regular operations, varying from lane dispatch to regional runs over three weeks:
Over a three-week period, ABF operated a Tesla Semi across typical dispatch lanes, including over-the-road routes between service centers in Reno, Nevada and Sacramento, California. The pilot also included regional runs in the Bay Area and rail shuttle operations.
ArcBest claims that Tesla Semi averaged 1.55 kWh per mile during the three weeks:
The electric Semi logged 4,494 miles, averaging 321 miles per day with an overall energy efficiency of 1.55 kWh per mile.
Efficiency in the trucking business varies considerably based on several factors, including the load, but it is nonetheless an impressive performance.
Dennis Anderson, ArcBest chief innovation officer, commented on the test program:
“Freight transportation is a vital part of the global economy, and we know it also plays a significant role in overall greenhouse gas emissions. While the path to decarbonization presents complex challenges — such as infrastructure needs and alternative fuel development — it also opens the door to innovation. Vehicles like the Tesla Semi highlight the progress being made and expand the boundaries of what’s possible as we work toward a more sustainable future for freight.”
Tesla says that the truck should enter volume production toward the end of the year and customer deliveries are expected to start next year.
While the efficiency of the electric truck has improved, we previously reported that its price has increased significantly.
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Range Rover now has its own logo for the first time. The luxury automaker is unveiling a sleek new look as it gears up to launch its first electric SUV later this year.
Range Rover introduces its first logo
Since it launched its first vehicle in 1970, the Range Rover badge has become an iconic status symbol. You can’t miss the classic Range Rover look.
With its first EV due out later this year, the luxury automaker is preparing for a new era. JLR revealed the new Range Rover logo, a first for the luxury automaker, during an investor presentation.
The new logo is a stark contrast to the “Range Rover” badge we are accustomed to seeing, featuring a minimalist design similar to the Rolls-Royce emblem.
JLR told Autocar that the new logo won’t replace the signature Range Rover badge at the front or rear. Instead, it will be used to complement it.
“The Range Rover Motif has been developed as a smaller symbol for where our familiar Range Rover device mark does not fit, such as on a label or as part of a repeating pattern, and within event spaces where an emblem is more appropriate,” the company said.
With Range Rover’s first electric SUV set to hit showrooms later this year, will we see it featured on the new EV? JLR confirmed in May that the Range Rover Electric now has over 61,000 clients on the waitlist.
The company claims the new EV is undergoing “the most intensive testing any Range Rover vehicle has ever endured” ahead of its big debut later this year.
According to Thomas Müller, Range Rover’s executive director of product engineering, the electric SUV is already outperforming some of its top gas-powered models.
JLR has already begun testing new EV production lines at its Solihull, UK, plant in preparation for the new Range Rover model. Next year, the luxury brand is expected to introduce the smaller Sport and Velar EV models.
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