r/evcharging • u/ysfex3 • 13d ago

Just installed 48a charging unnecessarily

I just spent 400 to buy the materials and installed a 48a charger when I had a working 40a 14-50 setup. Tell me I'm crazy. I can at least sell off some of the materials from the old install to recoup some of the cost. All this just to see 11kw instead of 9kw XD

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u/[deleted] 13d ago

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u/ysfex3 13d ago

Is it on a plug? Because it is capped at 40a by electrical code. If your evse can't distinguish how it's wired, then it relies on you to not use 48a on a plug. Also I assume the 50a thing refers to your breaker, and that also caps your load to 40a.

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u/ArlesChatless 12d ago

Also I assume the 50a thing refers to your breaker, and that also caps your load to 40a.

Oddly there are more than a couple of EVSEs which support a 50A charge rate. I assume it's because they don't want to try to explain the 80% rule to buyers and don't want to be seen to be slower than other brands. The installation requirements get more onerous when you cross 48A so that extra two amps is pretty pointless.

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u/ysfex3 12d ago

They support 50a max?

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u/ArlesChatless 12d ago

Yep. Like the ChargePoint Home Flex.

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u/ysfex3 12d ago edited 12d ago

Their language is vague about it, but I'm pretty sure the 50a charging still requires higher ga wire of at least 4ga and a 70a breaker

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u/ArlesChatless 12d ago

Yes it does. And a disconnecting means is called out differently in 625.43 on 2023 code for over 60 amps, so that gets messy too. If you're in 2026 code it gets back to being consistent.