The storm hit. The power’s out. With all the damage around you, it looks like you might be without power for a few days (at least). But you planned for this. You have a home backup battery. What happens now?
If you’re considering a home backup battery, or you already have one and haven’t needed it yet, you might be wondering what you’re supposed to do when the inevitable happens. The good news is: you probably won’t have to do much at all.
Modern home batteries are paired with an automatic transfer switch. That’s a switch, usually installed near your home’s electrical panel, that allows you to go from grid power, to battery, and back. And, because it’s automatic, you don’t have to do anything at all.
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The instant the grid goes down, the automatic transfer switch recognizes the loss of power and automagically disconnects your house from the grid, seamlessly connecting it to your backup battery instead. Your lights stay on, the refrigerator keeps humming, and whatever else you’ve chosen to back up just keeps on keeping on. In some cases, the transition to battery power happens so smoothly that you might not even realize the neighborhood’s lost power, not noticing the neighbors’ dark windows until you step outside.
When the power comes back, that side of the switch gets energized, and it does its thing again, only in reverse – switching you back from battery to grid power and intelligently re-charging the battery in anticipation for the next blackout.
How long will my battery last?
13.5 kWh Powerwall battery; via Tesla.
Unfortunately, this is one of those questions that doesn’t have an easy answer. In the simplest terms, if you have a small battery and try to keep the AC running, you might run out of juice in a few hours. On the other hand, if you have great big battery and save its electrons for just the barest essentials (a few lights, a laptop, and a phone or radio, for example) you might never run out of power.
To put some numbers to that, a 31 cu. ft. Samsung RF32CG5400SRAA stainless steel refrigerator is rated at 785 kWh/year. That works out to about 2.15 kWh/day. Factor in 20-40% higher energy needs for warmer temperatures, a few daily door openings, defrost cycles, inverter losses, etc. and you’re looking at 18-22 kWh of usable battery capacity to keep that thing running for a full week on battery power. Now do that same math for every appliance you deem a “must have,” then do the “nice to haves,” and on down the line.
What you need to do, in other words, is talk to the experts. Let them know what appliances you need to keep running, how long you want to prepare for, and let them do the math to help determine which battery solution is right for you.
I’ve included a video that covers the process of picking a solar battery from EnergySage (a trusted affiliate partner), below, and invite you to share some of your own backup battery-picking experiences in the comments.
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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Slate Auto, a new EV startup backed by Jeff Bezos, has poached a key Tesla manufacturing leader to build its electric pickup truck factory in Indiana.
Napoleon Reyes is a US Marine from Indiana who got a degree in mechanical engineering from Purdue after leaving the force.
He then worked a few years at Subaru and Wabash before joining Tesla’s manufacturing team at the Fremont Factory in 2020.
There, he became part of the Model Y production ramp and was quickly promoted to lead the Model Y General Assembly in Fremont in 2022.
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Reyes led Model Y GA, one of the most critical parts of vehicle manufacturing, for more than a year before being promoted again to lead new pilot processes at the factory.
Most recently, he led the launch of the general assembly line for the Model Y refresh.
The new engineering manager announced this week that he is leaving Tesla to join Slate:
A bit late on the post but after nearly 5 years working at Tesla in Fremont, I made the difficult decision to leave the Company and move closer to home with my family. It was an incredible experience being part of multiple line expansions and multiple Model Y program launches. Leading and managing the Model Y Refresh launch for GA in Fremont this year tested me professionally however we ultimately succeeded due to our amazing cross functional team collaboration. It’s been an absolute pleasure working with such great people, and I will forever be proud and thankful for everything we accomplished together.
I will be taking on a new role as Senior Manager, Plant Vehicle Engineering at Slate Auto in Warsaw, In.
The company raised over $700 million through two rounds of investments from several different investors, including Jeff Bezos. It is currently raising more, which basically guarantees that it will be able to reach production.
The startup acquired a former printing plant in Warsaw, Indiana. It is currently converting to manufacture its electric pickup with a team from legacy automakers and also several former engineers and leaders from Tesla.
Rich Schmidt, an early Tesla manufacturing director, is the head of manufacturing.
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Genesis is preparing to shake things up with its most luxurious SUV yet, the GV90. Thanks to a new patent filing, we are getting a detailed look at how its Rolls-Royce-style coach doors will work.
New patent reveals Genesis GV90 coach door system
When Genesis first unveiled the full-size SUV at the NY Auto Show last March, it wasn’t the stunning design or advanced tech that caught everyone’s attention. It was the coach doors.
Although we were worried it wouldn’t make it to the production model, like many concepts, the Genesis GV90 will be offered with coach doors.
The ultra-luxe electric SUV was first caught with coach doors earlier this year on a car carrier in South Korea. Just last month, the GV90 was spotted in California with a hinge at the rear to open the coach doors.
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After several new patents were filed with the United States Patent and Trademark Office for new door latching devices, we are getting a sneak peek at how they are expected to work.
The patents, titled “Cinching Device For Door Latches in Vehicle,” and “Door Latch Device for Vehicles,” give a pretty detailed explanation of how the Genesis GV90’s coach doors will operate. The “Door Latch Device” uses a door striker on the lower side of the door, which is opened or closed by a hinge unit.
Unlike traditional doors, which use the B-pillar for support, the device is attached directly to the door itself, allowing for hinge-like movement.
The cinching device works in a similar way. It’s also attached to the door and part of the vehicle. However, unlike most of its kind, Genesis found a way to use a single cinching device to control multiple units. Again, the device is used for B-pillarless doors that swing open.
Genesis already said that B-pillarless coach doors are now feasible in production vehicles. The patent reveals a glimpse into how the luxury automaker could make it a reality.
Genesis Neolun ultra-luxury electric SUV concept (Source: Genesis)
Although the Genesis GV90 is expected to be offered with coach doors, they will likely not be standard. Other variants, with traditional door handles, have also been spotted testing in the US and South Korea.
Genesis is expected to launch the GV90 in mid-2026. It will be built at Hyundai’s Ulsan plant in South Korea. The flagship Genesis SUV is scheduled to debut on Hyundai’s new eM platform, which the company said will “provide 50% improvement in driving range.” It will also be loaded with the latest technology, software, connectivity, and Level 3 or higher autonomous driving capabilities.
In the Electrek Podcast, we discuss the most popular news in the world of sustainable transport and energy. In this week’s episode, we discuss the launch of the Tesla Model YL, more Tesla probes and lawsuits, new Nissan Leaf pricing, and more.
As a reminder, we’ll have an accompanying post, like this one, on the site with an embedded link to the live stream. Head to the YouTube channel to get your questions and comments in.
After the show ends at around 5 p.m. ET, the video will be archived on YouTube and the audio on all your favorite podcast apps:
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Here are a few of the articles that we will discuss during the podcast:
Here’s the live stream for today’s episode starting at 4:00 p.m. ET (or the video after 5 p.m. ET:
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