Charger power needs
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If you have a 40A breaker it can draw 32A continuous. that should get you 7.68kW charging on a 240V circuit. If your battery were completely empty and assuming 10% charging losses and the truck has a 200 kWh battery it would take about 29 hours to charge to full.
220kWh/7.68kW = 28.6 hours
That’s completely empty to completely full. Most people charge their cars the same way they do their phones - plug them in every night. So you should only need to worry about charging what you use up each day.
For example if your commute is 50 miles each way (approximately 50 kWh usage if the truck really goes 400 miles on 200 kWh) it will take about 7 hours to fully recharge that 100 miles of range. You’d wake up with a full “tank” every morning.
55kWh/7.68kW = 7.16 hours.
If that doesn’t work for you, you may want to consider upgrading your service.
If anyones better at math feel free to correct me.
220kWh/7.68kW = 28.6 hours
That’s completely empty to completely full. Most people charge their cars the same way they do their phones - plug them in every night. So you should only need to worry about charging what you use up each day.
For example if your commute is 50 miles each way (approximately 50 kWh usage if the truck really goes 400 miles on 200 kWh) it will take about 7 hours to fully recharge that 100 miles of range. You’d wake up with a full “tank” every morning.
55kWh/7.68kW = 7.16 hours.
If that doesn’t work for you, you may want to consider upgrading your service.
If anyones better at math feel free to correct me.
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Assuming the on-board charger is capable of up to 19.2kw (similar to the Lyriq and soon-to-be-available on the Hummer) then you could go up to 100-amp circuit if you wanted to max out the at-home charge rate.
The max most new EV will charge at is 48 or 50A, which would require a 60A circuit. I believe a 60A circuit and 80A circuit require the same size wire though, so might as well go with an 80A breaker (this is what I have), and be future proofed a little bit. I don't see the need to go to 100A for a faster charger even if it becomes available.
Currently I have a Chargepoint Flex, which is 50A.
Currently I have a Chargepoint Flex, which is 50A.
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I'm building a new house, and had the option to run a 100-amp dedicated circuit in the garage and upgrade the breaker to 300-amp service for fairly cheap. That being said, most use cases are probably not going to need that much power frequently enough to be worth the cost of putting it in an existing house
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249 Posts
I guess that would be ideal for anyone with two EVs, which seems to be more common these days.
Will the Silverado EV be joining another EV in anyone's garage here?
We've got 2 Bolt EV's, planning for an E-AWD crossover/suv (likely an EV6 or Q4 E Tron), and eventually the Silverado. We've got 3 9.6kW chargers installed, two in the garage and one outside.
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My wife's Mach-E finally arrived a couple of weeks ago. For most daily commute driving, she can recoup her charge overnight with a simple 110 volt outlet. We put a hard wired Ford charging unit in at our vacation place, as it is a longer drive to get there and we need the full charge to make it home, it can bring the battery to full from around 40-50% in just a few hours. So far happy with this arrangement. I am happy to see the same plug will work on the Silverado.
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What was the cost of the Ford unit, installed, if you don’t mind my asking?
Prices for installation will vary a lot. It could be as cheap as a couple dollars to install a new outlet on an existing dedicated circuit, to thousands to run across the whole house for a new sub panel and hardwired installation. My installation was unfortunately closer to the latter category, but we needed an upgrade for the garage anyway. We had one 120V outlet on a circuit that was shared with our laundry room, and I was tired of popping a breaker every time I kicked on the air compressor and forgot the washer was running.
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The unit itself was around $700, install for the 220V/240V? unit was about 950 before I had to pay for an additional service panel since mine was fully maxxed out.
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So until the new panel was a thing, not too bad really. Thanks for getting back to me! I think once the order is placed and this becomes really REAL we will get this going.
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Oh man I hear that… we just moved into a brand new home after living in 1940’s construction with ancient electrical. No way would any of this be realistic in our last place. Hoping this is an easy deal for us but man I wish I would have had the foresight to handle this during construction
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333 Posts
Are there any specific chargers you're thinking of getting for your home @jcactus101?
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Had the chance to test out the EV6 yet? I hear the bZ4X is a nice rival and probably one of the best when it comes to build quality.
We looked at the ev6 on a lot, but haven’t driven it yet. It’s nice, headroom is low and the “frunk” is a joke, but my wife likes it. I was excited to see the bz4x/solterra until they announced the range. 220 miles is pathetic for a family adventure vehicle, I would have liked to see 275-300 miles.
We ended up with a 50A breaker to run a Grizl-e Duo charger which is 40A. The benefit is it has 2 charging cables, so it splits power for the cars until one is fully charged then gives more power back to the one that is still charging. It is working great so far. We use it with our Volt and now my wife's ID.4. The Volt will be replaced by an R1T or the Silverado.
Very good question. I asked my electrician the other day about putting a 240v outlet in my garage, and his first question was, "How many amps do you need?"
I think the real question is “how long do you want it to take for a full charge?” To figure that out, find divide the battery capacity by the power rate of your desired charger. So a 200kWh battery would take over 20 hours to charge from zero on a 40amp charger (200kWh/(240V*40A)).
I imagine the Chevy charger will be a 80 amp - 19.2kWh- unit, capable of a full charge in a little over 10 hours.
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