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A 240V 20amp circuit I think would meet the needs of 99% of commuters in the US. If your average miles/kWh is around 3.3 and you’re charging at 80% of the 20amp breaker limit (as you should be), even factoring in 10% losses in power transmission, you’re still charging somewhere around 11 miles per hour. Easy 100+ miles overnight with zero infrastructure change outside of a couple wire nuts and a cheap charger. Hell, depending on local codes, you might get away with slapping in a nema 6-20 receptacle to make it even easier…
Hell, depending on local codes, you might get away with slapping in a nema 6-20 receptacle to make it even easier…
If you do a receptacle, you’ve got to then do a GFCI. Check out the price difference between a GFCI breaker and one that isn’t. If you hardware the EVSE, you don’t need GFCI because GFCI is built into nearly all EVSE. If we’re doing this exercise to keep low costs, adding GFCI outside of the EVSE jacks up the price.
Are they somehow more expensive in the US? 40A 230V rated ones cost something like 30-50 € around here which doesn’t feel that expensive to me. I’ll admit it’s considerably more expensive (~4x the price) than a standard breaker, but it’s still more like a rounding error in overall costs.
Although EVSE’s projection doesn’t require you to periodically trip the GFCI so it doesn’t get stuck, which is a major plus.
Are they somehow more expensive in the US? 40A 230V rated ones cost something like 30-50 € around here which doesn’t feel that expensive to me.
In my suggested hardwired 240V 20A EV charger the total parts cost is just the regular breaker on the left at about $18.
The suggested solution you had of putting an outlet in would have parts cost of $119 + the cost of the GFCI breaker, the outlet and the receptacle cover. So that solution is 660% more expensive.
A 240V 20amp circuit I think would meet the needs of 99% of commuters in the US. If your average miles/kWh is around 3.3 and you’re charging at 80% of the 20amp breaker limit (as you should be), even factoring in 10% losses in power transmission, you’re still charging somewhere around 11 miles per hour. Easy 100+ miles overnight with zero infrastructure change outside of a couple wire nuts and a cheap charger. Hell, depending on local codes, you might get away with slapping in a nema 6-20 receptacle to make it even easier…
If you do a receptacle, you’ve got to then do a GFCI. Check out the price difference between a GFCI breaker and one that isn’t. If you hardware the EVSE, you don’t need GFCI because GFCI is built into nearly all EVSE. If we’re doing this exercise to keep low costs, adding GFCI outside of the EVSE jacks up the price.
Are they somehow more expensive in the US? 40A 230V rated ones cost something like 30-50 € around here which doesn’t feel that expensive to me. I’ll admit it’s considerably more expensive (~4x the price) than a standard breaker, but it’s still more like a rounding error in overall costs.
Although EVSE’s projection doesn’t require you to periodically trip the GFCI so it doesn’t get stuck, which is a major plus.
In my suggested hardwired 240V 20A EV charger the total parts cost is just the regular breaker on the left at about $18.
The suggested solution you had of putting an outlet in would have parts cost of $119 + the cost of the GFCI breaker, the outlet and the receptacle cover. So that solution is 660% more expensive.
Ok, so the US-style GFCI-breakers are indeed a lot more expensive than similarly rated DIN-rail alternatives. TIL
If it makes you feel better, I was shocked (pun intended) to learn this too, and I live here.
Fair enough! Anyone with existing 240v receptacles of any kind is a lucky duck, regardless.