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Electrek spoke with Heidi Gehring, associate director, cooling product marketing at Carrier HVAC, about the five essential things to know about this energy-efficient, cost-effective way to heat and cool a home.

Electrek: What’s a heat pump and how does it work?

Heidi Gehring: A heat pump is often mistaken for an air conditioner at first glance. What makes it different from an air conditioner is that it can both heat and cool your home using electricity and refrigerant.

In cooler months, heat is pulled from the outdoor air and transferred indoors; in warmer months, the system pulls heat out of the indoor air. Heat pumps have both an indoor and outdoor component. Each unit contains a fan and coil that operates either as a condenser (in cooling mode) or an evaporator (in heating mode). The fan moves the air across the coil and throughout the ducts in the home.

Electrek: Do heat pumps save you money, and what kinds of cost savings can be expected?

Heidi Gehring: Because heat pumps are more energy efficient, they can save you money on your heating and cooling bills. Your savings will vary based on the model you select.

Heat pumps are rated by their Heating Seasonal Performance Factor (HSPF2) – which is a measure of a heat pump’s overall energy efficiency during the heating season – their Seasonal Energy Efficiency Ratio (SEER2), and their Energy Efficiency Ratio (EER2). The higher the rating, the more energy-efficient the system. 

Additionally, the US government’s Inflation Reduction Act of 2022 includes incentives for the installation of high-efficiency home heating and cooling products, including up to a $2,000 tax credit for high-efficiency heat pumps and up to 30% for geothermal heat pump systems placed in service between 2022 and 2032. Look into local and state programs, too, as many utilities and local governments offer heat pump rebates.

Electrek: Why is a heat pump better for the environment?

Heidi Gehring: Heat pumps rely on electricity rather than fossil fuels, making them a much greener choice. Improvements in technology in recent years also mean that heat pumps are more efficient than ever, requiring less electricity than older heaters, furnaces, and air conditioners.

Geothermal heat pumps are also available – they pull energy directly from the earth to heat or cool your home and can result in up to 70% savings on your energy bill.

Electrek: What features should you consider when comparing different models?

Heidi Gehring: Heat pumps vary in the number of stages or speeds they offer. Different speeds or stages can affect your comfort and the consistency of indoor temperature. Humidity plays a major role but is often overlooked. Two-stage and variable-speed offer better control because they operate for a longer period of time at lower speeds and use less energy. These pull more humidity out of the air than models with a single-stage compressor.

Variable-speed and two-stage models are generally quieter than single-stage models, and because they run longer, that means the air is run through the filter more, so it has less chance of becoming stagnant.

Electrek: When is the best time of year to install a heat pump?

Heidi Gehring: Usually in the spring or fall. During the coldest winter months and hottest summer months, demand for systems and technicians increases, so you may experience longer wait times and higher prices. Make sure you hire a professional. HVAC systems of any kind require expert knowledge for installation and are not a good DIY project.

If you’re switching from a traditional HVAC system to a heat pump, you may also need electrical upgrades. A professional HVAC installer can help you with that as well.

Read more: This award-winning apartment heat pump can fit under a kitchen sink

Photo: Carrier HVAC


Heidi Gehring is the associate director, cooling product marketing at Carrier HVAC. She joined Bryant in 2017 as the quality manager for warranty, data analytics, and field service technology. In 2019, she moved into product marketing. She holds a bachelor’s degree in industrial and systems engineering from the University of Wisconsin Madison and an MBA from Purdue Global.


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Mercedes-Benz just opened more DC fast chargers at Buc-ee’s in Texas

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Mercedes-Benz just opened more DC fast chargers at Buc-ee’s in Texas

Mercedes-Benz High-Power Charging just opened more DC fast chargers at Buc-ee’s stores in the Dallas-Forth Worth area.

Three new Mercedes DC fast charging stations are at Buc-ee’s in Fort Worth, Temple, and Royse City. Mercedes asserts that every one of its chargers offers up to 400 kW of power.

It’s also adding 12 more charging stations at Buc-ee’s in the Dallas-Fort Worth, San Antonio, and Houston metro areas – also known as the Texas Triangle, home to 68% of Texans:

Buc-ee’s isn’t your typical convenience store – they’re huge, with some stores covering over 50,000 square feet, and they offer a wide variety of items, including snacks, beverages, fresh food, clothing, home decor, and Texas-themed merchandise. It’s known for its homemade fudge, jerky, and beaver nuggets (caramel-coated corn puffs). Most Buc-ee’s locations are open 24 hours a day, seven days a week.

In November 2023, Mercedes announced it had made an agreement with Buc-ee’s to build EV charging hubs at most of its existing stores. Mercedes is aiming to have around 30 online by the end of the year. There are currently 48 Buc-ee’s locations across the US South, 34 of which are in Texas.

When I spoke to Mercedes-Benz High Power Charging CEO Andrew Cornelia last year, he was passionate about the importance of placing EV chargers near amenities that travelers need.

Mercedes offers open access for all EV drivers, including roaming with other charging networks. Its charging hubs support contactless payments with credit cards or smartphone wallets.

The first Mercedes DC fast charging station came online last November at its headquarters in Sandy Springs, Georgia. Mercedes-Benz plans to deploy 2,500 high-powered chargers in 400 hubs by 2027.

Texas is the US’s No. 1 producer of clean energy and ranks fourth in public EV charging. However, to meet driver demand, the state needs around 95,000 more public chargers by 2027.

Read more: America, Mercedes-Benz wants you to indulge in retail therapy while you’re DC fast charging


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Polestar (PSNY) stock faces potential Nasdaq de-listing after failing to file its annual report

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Polestar (PSNY) stock faces potential Nasdaq de-listing after failing to file its annual report

Another EV stock may be removed from the Nasdaq exchange. After failing to file its annual report, Polestar (PSNY) received a notice from the Nasdaq as the company faces a possible de-listing.

Polestar, Volvo’s former high-performance unit, was established as an EV brand in 2017 under Geely’s control.

Since launching the Polestar 2, its first all-electric vehicle, the brand has expanded into 27 markets globally. The electric car has even become a top seller in several key markets like Norway, Sweden, and Germany.

However, like many EV startups, Polestar has hit its fair share of hurdles. After cutting guidance late last year (from 80K to 60K), Polestar still missed its target, delivering 54,600 vehicles last year.

In February, Volvo announced plans to sell 62.7% of its stake in Polestar as it looks toward its next growth stage. Volvo also confirmed it will “not provide further funding to Polestar” outside of its existing $1 billion outstanding convertible loan.

The news came after Polestar announced plans to cut 15% of its global workforce amid slowing EV sales earlier this year.

Polestar-de-listing
2024 Polestar 2 (Source: Polestar)

Polestar stock facing potential Nasdaq de-listing

After failing to file its annual report for the fiscal year ending December 31, 2023, Polestar received a deficiency notice from the Nasdaq.

The notice states Polestar is not in compliance with its listing rules, which require the timely filing of periodic financial reports.

Polestar-4-price
Polestar 4 (Source: Polestar)

Polestar said the notice has no immediate impact on the company’s listing. However, under the Nasdaq listing rules, Polestar has 60 days to submit an action plan. If Nasdaq accepts it, Polestar could be issued an additional 180 days from the notice date, or until November 2024, to regain compliance.

The company has already received consent from lenders under its nearly $1 billion 3-year loan facility for the late filing. Polestar says it is fully committed to regaining compliance.

Polestar is working to file the annual report “as soon as practicable” and to report Q1 2024 earnings shortly after.

Polestar-de-listing
Polestar (PSNY) stock chart over the past 12 months (Source: TradingView)

Polestar stock was down over 13% on Monday following the potential de-listing notice. PSNY shares are now down over 50% this year, hitting their lowest prices since going public.

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Toyota announces nationwide dealer rollout of Tern Class 8 electric semi

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Toyota announces nationwide dealer rollout of Tern Class 8 electric semi

Launched as a joint venture between Toyota Group and Tier 1 supplier Hexagon Purus, the new Tern brand of heavy duty electric trucks announced Hino Trucks as its exclusive US distributor.

Another Toyota Group brand, Hino Trucks nevertheless brings a nationwide network of more than 200 heavy truck dealers (and their customers) to the new JV with Hexagon, which is specifically focused on electrifying “practical” commercial vehicle applications.

Glenn Ellis, President and CEO of Hino Trucks, expressed enthusiasm about the partnership. “Our collaboration with Hexagon Purus introduces a highly reliable Class 8, 4×2 tractor option into the electric truck market, catering to a wide range of applications,” he explained. “We are excited to be the exclusive distributor for Tern with an initial distribution focus in California, where fleet electrification is imperative.”

Tern RC8 electric semi

The new Tern RC8 electric truck offers a 68,000 lb. GVWR, 680 peak horsepower electric motor (494 continuous), a 200 mile range, and the ability to go from 0-80% charge in less than two hours at 240 kW. Energy comes from dual Hexagon Purus Gen3 269kWh battery packs in a 750-volt, 538 kWh configuration.

The announcement coincides with California’s Advanced Clean Fleets regulation, and was made today at the ACT Expo, which is taking place this year in the West Hall of the Las Vegas Convention Center. Serial production for the Tern RC8 is scheduled to begin later this year.

Electrek’s Take

Tern RC8 electric semi truck; via Hino Truck.

It’s hard to act surprised that a Toyota brand is going to be supported by Toyota’s existing dealer network, but it’s worth noting that, while Toyota is marketing/lobbying against EVs on the one hand, it’s quietly investing big bucks into battery electric on the other.

My guess: as soon as Toyota has a viable BEV on the market, they’ll “suddenly” realize that BEVs were the way to go all along. #bet

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