2 charging points at home?
Discussion
Chademo as in actual DC ? or type 1 ?
Assume a second charger will need a CT meter fitted to allow it to wind down the power if your house consumption is already >70A
Don't overlook the simple outside socket. A steady 10A overnight still adds a lot of miles. And you can get a type1-type2 converter to charge the new car on the existing charger, if it needs a rapid boost
Assume a second charger will need a CT meter fitted to allow it to wind down the power if your house consumption is already >70A
Don't overlook the simple outside socket. A steady 10A overnight still adds a lot of miles. And you can get a type1-type2 converter to charge the new car on the existing charger, if it needs a rapid boost
essayer said:
Chademo as in actual DC ? or type 1 ?
Assume a second charger will need a CT meter fitted to allow it to wind down the power if your house consumption is already >70A
Don't overlook the simple outside socket. A steady 10A overnight still adds a lot of miles. And you can get a type1-type2 converter to charge the new car on the existing charger, if it needs a rapid boost
Yes, a DC Chademo charger.Assume a second charger will need a CT meter fitted to allow it to wind down the power if your house consumption is already >70A
Don't overlook the simple outside socket. A steady 10A overnight still adds a lot of miles. And you can get a type1-type2 converter to charge the new car on the existing charger, if it needs a rapid boost
10A isn't going to cut it. It's 80kwh and I'll want to be able to go from (nearly) empty to full overnight.
You have 2 options:
1. Install a single charger as normal and then a second one with load management. At night there will be minimal draw from the house and so both will run at max speed.
2. Install one charger. Unless you are going to have 2 or more EVs needing to be fully charged every day you won't need two chargers. In the same way, you don't fill up your two ICE cars with fuel at the same time every day/week etc. Usually one car does a high mileage and the other a low mileage.
We have installed hundreds of chargers and have only ever fitted two chargers once. For 995 of people it just isn't necessary.
1. Install a single charger as normal and then a second one with load management. At night there will be minimal draw from the house and so both will run at max speed.
2. Install one charger. Unless you are going to have 2 or more EVs needing to be fully charged every day you won't need two chargers. In the same way, you don't fill up your two ICE cars with fuel at the same time every day/week etc. Usually one car does a high mileage and the other a low mileage.
We have installed hundreds of chargers and have only ever fitted two chargers once. For 995 of people it just isn't necessary.
Frimley111R said:
You have 2 options:
1. Install a single charger as normal and then a second one with load management. At night there will be minimal draw from the house and so both will run at max speed.
2. Install one charger. Unless you are going to have 2 or more EVs needing to be fully charged every day you won't need two chargers. In the same way, you don't fill up your two ICE cars with fuel at the same time every day/week etc. Usually one car does a high mileage and the other a low mileage.
We have installed hundreds of chargers and have only ever fitted two chargers once. For 995 of people it just isn't necessary.
So your advice is to remove my existing charger and replace it with a new one?1. Install a single charger as normal and then a second one with load management. At night there will be minimal draw from the house and so both will run at max speed.
2. Install one charger. Unless you are going to have 2 or more EVs needing to be fully charged every day you won't need two chargers. In the same way, you don't fill up your two ICE cars with fuel at the same time every day/week etc. Usually one car does a high mileage and the other a low mileage.
We have installed hundreds of chargers and have only ever fitted two chargers once. For 995 of people it just isn't necessary.
I have two (Zappis) but they are configured with load management, not only do they monitor the grid connection where I can set an overall grid limit, but they are aware of their own direct loads and I can set a group limit just for the chargers irrespective of any other load.
I wouldn't just assume you can install it, put a CT clamp on the grid connection and make sure you stay under a threshold set near the cut-out fuse threshold. The DNO would need notifying presumably and might mandate that you set a threshold somewhat lower.
If you need to charge 2 cars simultaneously, regularly at ~7kW each I would seriously consider looking at the cost/feasibility of 3 phase which is exactly what I ended up doing.
I wouldn't just assume you can install it, put a CT clamp on the grid connection and make sure you stay under a threshold set near the cut-out fuse threshold. The DNO would need notifying presumably and might mandate that you set a threshold somewhat lower.
If you need to charge 2 cars simultaneously, regularly at ~7kW each I would seriously consider looking at the cost/feasibility of 3 phase which is exactly what I ended up doing.
Chamedo connectors are being replaced and it really depends on whether you next EV has this type of connector - it's unlikely.
A new 7kW/32A AC charger with a Type 2 connector will work for all/any EVs going forward. 7kW is still a lot of power. Is your DC charger 7kW too? I'm not sure I've come across a home DC charger before.
A new 7kW/32A AC charger with a Type 2 connector will work for all/any EVs going forward. 7kW is still a lot of power. Is your DC charger 7kW too? I'm not sure I've come across a home DC charger before.
I've got two charging points at home, a 16amp Type 1 charger and a 32amp Type 2 charger, and I have to admit that I've never really thought about load limiting! And the installers never mentioned it either.
Having said that, we have gas powered heating, hot water and cooking, so I doubt the rest of the electric demand is ever enough to cause a problem with our 100amp supply.
Having said that, we have gas powered heating, hot water and cooking, so I doubt the rest of the electric demand is ever enough to cause a problem with our 100amp supply.
Frimley111R said:
You have 2 options:
1. Install a single charger as normal and then a second one with load management. At night there will be minimal draw from the house and so both will run at max speed.
2. Install one charger. Unless you are going to have 2 or more EVs needing to be fully charged every day you won't need two chargers. In the same way, you don't fill up your two ICE cars with fuel at the same time every day/week etc. Usually one car does a high mileage and the other a low mileage.
We have installed hundreds of chargers and have only ever fitted two chargers once. For 995 of people it just isn't necessary.
You should write a ‘sticky’ thread on this, as more people will ask this same question again when they start replacing their second family cars with a plug in.1. Install a single charger as normal and then a second one with load management. At night there will be minimal draw from the house and so both will run at max speed.
2. Install one charger. Unless you are going to have 2 or more EVs needing to be fully charged every day you won't need two chargers. In the same way, you don't fill up your two ICE cars with fuel at the same time every day/week etc. Usually one car does a high mileage and the other a low mileage.
We have installed hundreds of chargers and have only ever fitted two chargers once. For 995 of people it just isn't necessary.
blank said:
I'm interested in how you ended up with a Chademo charger at home. Was it to get Vehicle to Grid / Vehicle to Home ability?
Presumably it was pretty expensive compared to an AC charging point?
That's right, it was part of a V2G trial a couple of years ago. I didn't have to pay.Presumably it was pretty expensive compared to an AC charging point?
Have you done the maths, how many miles you need for both cars, how many miles you can add etc.
It’s surprising I can add over 140 miles on a 12 hour overnight charge with a plug. That said you won’t be getting that cheap rate, although if you are balancing 2 7kw chargers maybe you’ll need longer than 4/5 hours anyway.
It’s surprising I can add over 140 miles on a 12 hour overnight charge with a plug. That said you won’t be getting that cheap rate, although if you are balancing 2 7kw chargers maybe you’ll need longer than 4/5 hours anyway.
Amateurish said:
I calculate approx 40 hours for a full charge on a granny plug. Range should be about 200 miles in winter. So an overnight charge would give me about 60 miles.
Yeah a granny isn't as good for doing serious mileage especially if you want to make the most of Octopus Go/Intelligent etcHave you considered selling the V2G and replacing it with a type 2? Then using a granny for the Leaf ?
Edited by essayer on Thursday 2nd March 09:56
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