A new Oxford University study found air source heat pumps to be more efficient than oil and gas heating in cold and subzero temperatures.
Heat pumps are a cost-effective, efficient, and low-emissions way to cool and warm households, with global sales increasing 11% in 2022 and US sales outpacing those of gas furnaces for the first time the same year. But misinformation and misunderstandings persist about the ability of air source heat pumps to perform in below-freezing temperatures.
New research from researchers at Oxford University and the Regulatory Assistance Project (RAP) found that not only do heat pumps have superior efficiency compared to oil and gas systems, but they also perform reliably in temperatures well below 0°C (32°F).
Mild cold climate results
The researchers write in the journal Joule about heat pumps’ coefficient of performance (COP), which is the ratio of the useful heat outputted to energy consumed:
Typical COP values for heat pumps lie in the range of 3 to 6, indicating that 3 to 6 units of heat are created from each unit of electricity used. A year-round average COP of 3-4 is common for household applications.
The researchers looked at air-source heat pump performance in mild cold climates in Canada, China, Germany, Switzerland, the US, and the UK. They plotted average COP measurements versus external temperature collected from seven field-testing studies in five countries. A trend line calculated using a locally weighted scatterplot smoothing is shown in the below chart:
They concluded:
When the outside temperature was between 5C and −10C, the mean COP across all systems was 2.74 and the median was 2.62, sufficient to meet heating loads at much higher efficiency than fossil heating and electric resistance heat alternatives.
In climates that stay above -10C (14F), the air source heat pump is more than able to do the job on its own – in a cheaper, much cleaner way than fossil-fuel-powered heating. No oil or gas backup is needed, asserts the scientists.
Extreme cold climate results
The team also tested specially engineered “cold-climate heat pumps” in extreme cold in Minnesota, Alaska, and Finland. They found that those units “can operate with a COP between 1.5 and 2. However, considering the related increase in heating demand and decrease in device efficiency, some form of backup heating may be required.”
The researchers concluded that “backup heating was typically only engaged when the outside temperature dropped past −10C (14F) or lower. Above −10C (14F), heat pumps were able to provide the required heat at relatively high efficiency.”
Electrek’s Take
If you have a gas or oil heating system in your home, it’s worth getting a heat pump. And if you live in a very cold climate, you’ll be able to use your heat pump most of the time and just tap into your old system as backup if extreme cold strikes.
Having a heat pump is going to reduce your heating costs as well as your household’s emissions. And as temperatures continue to rise overall, the heat pump will cool down your home in the warmer months as well.
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Hot on the heels of the Fiat 4×4 Grande Panda Manifesto comes another subcompact Stellantis compact with electric drive and off-road ambitions. Meet the Opel Frontera GRAVEL – which might be our best look yet at the next-generation electric Jeep Renegade coming in 2027.
Based on a lifted Frontera EV and riding on a set of bespoke, 7×16″ Borbet CWE wheels wrapped in aggressive AT tires, Opel says its all-electric Frontera GRAVEL’s emissions-free driving makes it ideally suited for “soft-roading” nature drives (their words, not mine), with a rugged, adventurous 4×4 appearance.
Those rugged, Jeep-like good looks are backed up enhanced by the usual overland accessories, including a front-mounted winch, side storage boxes at the rear, and a lattice-style roof rack. A slew of accessory lights mounted on the Thule Canyon XT carrier and hood, as well, for excellent nighttime visibility off-road and (presumably) retina-searing intensity on-road.
“The new Opel Frontera is already standout,” says Rebecca Reinermann, Vice President of Marketing for Stellantis’ Opel and Vauxhall brands. “It is rugged, practical, and perfect for families and everyday adventures. But with the Frontera GRAVEL show car, we’ve pushed the limits, imagining a tougher, more daring, trailblazing version. This concept is built to fire up our fanbase and test the demand for a bolder, more rugged Frontera in the future. It’s all about freedom, adventure, excitement and pushing boundaries.”
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Like the recent Fiat concept mentioned at the top of this post, the production Frontera EV is based on Stellantis’ “Smart Car” BEV-native platform, and features a 113 hp electric motor and more than 300 km of WLTP range (about 185 miles) standard, with the “long range” version able of traveling up to 400 km (about 250 miles) between charges.
Either version comes with the “Pure Panel” digital cockpit featuring dual 10″ displays. For a few dollars quid more, the GS trim adds automatic climate control and Intelli-Seat front seats. And, if Mopar Insider has any idea what’s up, it might actually make for a decent little Jeep Renegade replacement (below).
Electric Jeep Renegade rendering
2027 Jeep Renegade rendering; via ChatGPT.
The Opel Frontera first came to our attention last October, when it became the first new EV from Stellantis to be offered with both ICE and battery power, for the same price – making EV price parity an objectively real thing.
Jeep parent company Stellantis has already confirmed that a new Jeep Renegade that’s priced below the upcoming Jeep Compass EV would be coming to the US as a 2027 model, and it’s expected to share its mechanicals with both the Frontera and Fiat’s recently teased Grande Panda Manifesto. If that does anything for you, let us know in the comments.
Year after year, a seemingly endless raft of all-electric concept bikes wearing Honda badges have made their way across the motor show stage without ever making it onto the dealer showroom. But now, it’s here: this unmissable, cafe racer-inspired electric Honda motorcycle is the company’s first – and you can buy it!
We got our first look at this first-ever production electric motorcycle from Honda back in March, when leaked type-approval documents hinted at a 75 mph 125 cc-class motorcycle with cafe racer styling and a “WH8000D” designation first surfaced. It was clear, then, that Honda was seriously working on a for-real electric motorcycle – what wasn’t clear was when (or even if) it would ever see productions.
The wait is over
Honda E-VO 75 mph electric motorcycle; via Honda.
The new Honda E-VO is available in dual- or triple-battery versions that feature either 4.1 or 6.2 kWh of battery capacity. On the triple-pack version, riders can enjoy up to 170 km WMTC (about 105 miles) of riding. Recharging takes about 2.5 hours on a standard outlet or about 90 minutes on an L2 (like the Harley-Davidson backed Livewire or Vespa Elettrica electric bikes, DC fast charging is not available).
Both battery configurations drive a motor with a peak power of 15.3 kW, or about 20 hp. And, like all electric motors, all the torque is available at 0 rpm, giving the Honda E-VO in-town performance similar to much higher (than 125 cc) displacement bikes.
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In addition to superior stop-and-go performance, the Honda E-VO offers riders a number of other innovative (for a motorcycle) features, including a 7-inch TFT instrument display paired with a second 7-inch TFT screen for navigation, music, tire pressure, and battery SOC information. The smaller battery pack version of the E-VO includes a front dash cam, while the larger model has both a front and rear dash cam as standard equipment.
The Honda E-VO is available in the black and off-white color schemes (shown). Prices start at 29,999 yuan, or about $4500 for the 4.1 kWh version, and 36,999 yuan (about $5100) for the 6.2 kWh triple-pack version.
Electrek’s Take
Honda E-VO electric motorcycle; via Honda.
Yes, this is a Chinese-market bike built by Honda’s Chinese Wuyang venture. No, we probably won’t ever get something like this in the US, where a raucous, 113 hp 600 cc CBR600RR is somehow positioned as a “good starter bike” by cowards with 3″ wide chicken strips on their tires. That said, if the motorcycle industry as-a-whole wants to survive in North America, zippy, affordable, lightweight motorcycles are exactly what’s needed.
Here’s hoping we get something like this stateside rather sooner than later.
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Westerners in-the-know look longingly at the affordable, value-packed electric cars rolling out of China – but what could you get if money was no object? If you were to spend 100,000 US American dollars on a Chinese EV, how good could these Chinese cars really get? Huawei’s 852 hp Maextro S800 is the answer.
Packing up to 852 hp and a cutting-edge technology stack developed by Huawei, Chinese luxury brand Maextro revealed its latest entry into the Mercedes-Maybach EQS and Rolls-Royce Spectre segment of ultra-luxe EVs, the S800, back in February. Now, it’s officially on sale, priced at 708,000 and 1,018,000 yuan (approx $97,500-140,000), and ready to make an entrance.
As I wrote at the car’s launch, the Maextro S800’s bespoke, purpose-built platform doesn’t share any parts with a lesser offering in the Huawei lineup in the same way a Mercedes or BMW or Volkswagen does with a Maybach, Rolls-Royce, or Bentley, respectively. And, while I admit that that may not mean much to you and me, I maintain that it might to the people shopping six- and seven-figure cars. And that might be especiallytrue to people willing to shell out that kind of cash for a car in China’s generally lower-priced market.
That seems to be the kind of upmarket experience people of the People’s Republic want, if the S800’s two thousand initial orders (in just two days) are and indication. And, lucky for those buyers, the Maextro is set to deliver plenty in return.
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The vibe is immaculate
Maextro S800 at launch; via Huawei.
Those well-heeled buyers will get a choice of EREV or “pure” battery electric powertrains good for between 480 and 852 all-electric horsepower. 32 ADAS sensors including both radar and lidar compliment a suite of cameras analyze the road ahead and feed data to Huawei’s ADS road perception system, which is constantly adjusting torque distribution, suspension compression and rebound, and front and rear steering to deliver a tech-driven chauffeur experience that Huawei insists is second to none.
Huawei says its robotic driver is pretty handy when the weather gets nasty, too, thanks to an advanced sensor array that helps to increase the detection distance in rain, fog, and dust by 60% compared to the benchmarked competition.
While the car is its passengers around, they’ll get to enjoy luxurious, reclining rear seats with next-level mood lighting handled by a fully independent rear passenger system that supports intelligent track lighting, gesture dimming, and a panoramic “starry sky” moonroof that includes meteor shower effects.
The Maextro S800 also offers intelligent privacy glass and a unique door-closing function are also controlled with advanced gesture controls, in case you needed reminding that China is living in the year 3000 while the US is being plunged headlong into the 1940s by a pack of pseudo-conservatives too old to realize their gold standard policies will do nothing but hurt a fiat economy that’s consistently proved out the basic hypotheses behind modern monetary theory over the last five or six decades – but that’s a lot for an EV blog.
Instead of that, let’s ooh and ahh over the Maextro S800’s ultra-luxe interior in the photo gallery, below, then keep the debate to the relative merits of one of these over, say, a Mercedes-Benz EQS in the comments.
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