I think that is the same one I was pointing you to in post #12 above.
Yes, that's how I found it, thanks.
You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I think that is the same one I was pointing you to in post #12 above.
Okay, but as I already pointed out this is missing the critical point that if they have 2x 32A chargers with no derating then they have at best about 33A left over for everything else. And as phil4 says it all adds up to well over 100A, and homes in the UK have 100A fuses and you need expensive upgrades which might not even be granted to get more.
This just isn't going to work.
I think you are confusing two aspects of this discussion. The 2 charge points will be capable of running at 32 amps individually at different times but not both at the same time. They will load share to manage 32amp total at any one time if both are running simultaneously. As Glan explained the regulations require that the load is treated as if it is going to be just a simple added total ... even though this is not what the charge points will be drawing.
I think you are confusing two aspects of this discussion. The 2 charge points will be capable of running at 32 amps individually at different times but not both at the same time. They will load share to manage 32amp total at any one time if both are running simultaneously. As Glan explained the regulations require that the load is treated as if it is going to be just a simple added total ... even though this is not what the charge points will be drawing.
Yes, I understand that. But then you need a load balancing charger. I thought the goal was to save money and speed wasn't a big issue, so two 16A chargers would be cheaper and adequate.
Yes, I understand that. But then you need a load balancing charger. I thought the goal was to save money and speed wasn't a big issue, so two 16A chargers would be cheaper and adequate.
No, my original query was to allow charging of two vehicles without running another cable if possible - because where my cables run is very tight in places.
Re-using the existing cable would be ideal from a disruption point of view, but if it has to be upgraded to something slightly thicker then that would be OK too at a push.
I've asked here because installers will sometimes tell you something can't be done because they can't be bothered to do it, so I figured that I would get answers telling me what is possible allowing me to ask the right questions and weed out those installers.
OK, so I don't want to be forking out £10k for a solution as that feels disproportionate, but I just want to figure out my options at this stage so I can decide if I want to spend the money.
TWC Gen 3 (for example) looks interesting because if the possibility that it will be able to "talk" to my PowerWall in future and charge the car with excess solar during the summer. That option will look more attractive if I end up having to bite the bullet and put an additional cable in because I'll then swap the current Rolec for a second one when/if the Mrs gets her car.
Ah in that case have you looked at "commercial" units? Something like a Rolec SecuriCharge?
Rolec EV-SecuriCharge Double Charger 18th Edition 16A 3.6kW EVSC0050 | RS Electrical Supplies
Dual 16A sockets from a single 32A supply, no cable upgrades needed. Not smart or anything like that but you might prefer that, the simple ones tend to be more robust and reliable.
Chances are the cost of upgrading to use the TWC would take many, many, many years to pay off from solar savings, especially if you are on a good tariff like Octopus.
I hadn't looked at commercial, good point. I think I more or less assumed they would be stupidly expensive because they're commercial.
That looks like one for the shortlist, or something like that.
Dual 16A sockets from a single 32A supply, no cable upgrades needed. Not smart or anything like that but you might prefer that, the simple ones tend to be more robust and reliable.
But then when charging only one car you remain on half the potential speed. This is a real issue if taking advantage of the short off-peak tariffs, such as Octopus Go, because 4hrs often wouldn't give you enough time to charge.
The supply is 32amp, so whether you have fancy (expensive) load balancing chargers or not, they will get 16amp each.
May as well save some money and just have 2x 16amp 'basic' chargers.
It sounds like the diversity rules will disregard this (and I suppose I can understand the concern). So will a priority board potentially solve this?
Sounds like a fault with the car if it doesn't meet IEC 61851, you should have asked Tesla to fix it.
A priority board would work but you have to remember that only one car will charge, so if you need one to be ready in the morning better put it on the right charger. Obviously it depends on your usage pattern which will be of more use to you.
Sounds like you are an unusually high consumption user though. 7 hours at 16A will net you around 100 miles range, so if a "relatively short day out" was covering more than that you either drive extremely inefficiently or have different ideas about what a short day out is.