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Discussion Starter #1
Hi,

I am a complete newby when it comes to electrics and charging points. I had a chargemaster 7kw charger fitted by ChargedEV. Prior to install i was told by ChargedEV that i needed to upgrade my fuse to 100A, which i subsequently did by paying Western Power. However, since install my unit has been charging at half the rate and I queried this with ChargedEV without really getting anywhere.
Only yesterday after getting advice from this forum i managed to flip the switch from 16A to 32A within the junction box which seems to have fixed my problem and my car charges as the advertised rate of 7kw that i paid for.
I thought this might have been an installation error and i emailed ChargedEV as they had an open service issue on my account. They advised that this was deliberate because based on onsite electrical reading the output exceeded my fuse limit. They state that my maximum demand was 80A and with the fuse being 100A, they had to limit the install to 16A. Also that i have now invalidated my warranty by doing this.
Firstly, at the time of the install I wasn’t told about this capacity issue and i was expecting to be getting 7kw charging. I received an electrical certificate, however that didn’t tell me anything about charging as I didn’t even know what 16/32A was at the time. Also my house is only a 3 bed semi with gas central heating. I don’t have an electric shower, so wasn’t sure what would be drawing so much power.
I am expecting a call with ChargedEV next week, but just want advice if what am being told makes sense?
 

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Renault ZOE R135 ZE50 GTLine July 2020 (Sold: R90 ZE40 i Dynamic Nav June 2017)
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They state that my maximum demand was 80A and with the fuse being 100A, they had to limit the install to 16A. Also that i have now invalidated my warranty by doing this.
Consumer units are regularly loaded with circuit breakers exceeding the DNO fuse. Diversity is allowed for - meaning that it is almost impossible for everything in your house to be switched on at the same time. There should be no problem at all with adding a 32A charge point to your system. Go back to ChargedEV and ask to speak to a technical specialist.
 

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I have a similar scenario with a 3 bed semi, GCH, no power shower, gas hob, double oven which can technically pull 4kw, and I switched from a 60A to 80A main fuse (the max for my incoming cable). They happily installed a 32A charger. A second 16A would be pushing it i suspect.
Go back to them for a proper breakdown of where the load is coming from preventing a 32A charger install.
 

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Ioniq 38kwh 2020
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Doesn't seem to make a lot of sense, I only have a 60/80A mains fuse, yet my consumer unit adds up to 188A. There was no mention of only having a 16A charger when I was quoted for a Home charge point. It was always going to be a 32A one. I could possibly understand it if you had an electric shower.
 

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Leaf 30kWh, Outlander PHEV
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Doesn't seem to make a lot of sense, I only have a 60/80A mains fuse, yet my consumer unit adds up to 188A. There was no mention of only having a 16A charger when I was quoted for a Home charge point. It was always going to be a 32A one. I could possibly understand it if you had an electric shower.
You don't turn on all appliances at once ever.

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Ioniq 38kwh 2020
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You don't turn on all appliances at once ever.

That said what is your car capable of taking in?

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No, you don't turn everything on at once, but it isn't inconceivable that someone might take a 43A electric shower, whilst the car is charging at 32A, And maybe the oven is on
 

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KIA Soul EV 64kWh
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Hi,

I am a complete newby when it comes to electrics and charging points. I had a chargemaster 7kw charger fitted by ChargedEV. Prior to install i was told by ChargedEV that i needed to upgrade my fuse to 100A, which i subsequently did by paying Western Power. However, since install my unit has been charging at half the rate and I queried this with ChargedEV without really getting anywhere.
Only yesterday after getting advice from this forum i managed to flip the switch from 16A to 32A within the junction box which seems to have fixed my problem and my car charges as the advertised rate of 7kw that i paid for.
I thought this might have been an installation error and i emailed ChargedEV as they had an open service issue on my account. They advised that this was deliberate because based on onsite electrical reading the output exceeded my fuse limit. They state that my maximum demand was 80A and with the fuse being 100A, they had to limit the install to 16A. Also that i have now invalidated my warranty by doing this.
Firstly, at the time of the install I wasn’t told about this capacity issue and i was expecting to be getting 7kw charging. I received an electrical certificate, however that didn’t tell me anything about charging as I didn’t even know what 16/32A was at the time. Also my house is only a 3 bed semi with gas central heating. I don’t have an electric shower, so wasn’t sure what would be drawing so much power.
I am expecting a call with ChargedEV next week, but just want advice if what am being told makes sense?
ChargedEV seem to be talking nonsense! If you have a 100A supply fuse and the right distribution board & wiring then a 32A (7kW) supply to the car should be fine.
I'm not sure I understand which switch you "flipped" to convert from 16A to 32A, the chargers usually have an internal setting which is set by the installer
 

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No, you don't turn everything on at once, but it isn't inconceivable that someone might take a 43A electric shower, whilst the car is charging at 32A, And maybe the oven is on
Yes, but these systems don't suddenly expire at 100A. They can operate at well over 100% for quite a while because of the thermal lag.
Once the oven is up to temperature it will cycle and the shower is likely to only run for 5-10 minutes, at which point the fuses/breakers and cables will drop below 100% and cool down a bit.
 

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Leaf 30kWh, Outlander PHEV
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No, you don't turn everything on at once, but it isn't inconceivable that someone might take a 43A electric shower, whilst the car is charging at 32A, And maybe the oven is on
True.

Ovo turned me down for V2G as concurrent usage of appliances without EV was close to 100A


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No, you don't turn everything on at once, but it isn't inconceivable that someone might take a 43A electric shower, whilst the car is charging at 32A, And maybe the oven is on
We have a 100 amp fuse, a 10kW electric shower, a double electric oven, (the stove top elements are gas though) a hot water cylinder immerser (although only as a backup to gas, so usually not used) and the usual suspects - microwave, kettle, toaster, dishwasher and combination washer dryer.

The installer didn't even bat an eyelid at installing a 32 amp charger, and we've never had an issue. Sure, in theory if every high power device in the house was turned on at once it would exceed 100 amps / 23kW but I've never seen this happen in practice. I've never seen the total load go over about 18kW even with many of the power hungry devices running together including shower and car charging and even then only for a short time.

It's quite common for the car to be doing plugged in preheating in the morning at the same time that the shower, dishwasher and toaster/kettle are being used.

It's normal for the total potential load to be a bit more than the incoming fuse limit - its called diversity.
 

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Hi,

I am a complete newby when it comes to electrics and charging points. I had a chargemaster 7kw charger fitted by ChargedEV. Prior to install i was told by ChargedEV that i needed to upgrade my fuse to 100A, which i subsequently did by paying Western Power. However, since install my unit has been charging at half the rate and I queried this with ChargedEV without really getting anywhere.
Only yesterday after getting advice from this forum i managed to flip the switch from 16A to 32A within the junction box which seems to have fixed my problem and my car charges as the advertised rate of 7kw that i paid for.
I thought this might have been an installation error and i emailed ChargedEV as they had an open service issue on my account. They advised that this was deliberate because based on onsite electrical reading the output exceeded my fuse limit. They state that my maximum demand was 80A and with the fuse being 100A, they had to limit the install to 16A. Also that i have now invalidated my warranty by doing this.
Firstly, at the time of the install I wasn’t told about this capacity issue and i was expecting to be getting 7kw charging. I received an electrical certificate, however that didn’t tell me anything about charging as I didn’t even know what 16/32A was at the time. Also my house is only a 3 bed semi with gas central heating. I don’t have an electric shower, so wasn’t sure what would be drawing so much power.
I am expecting a call with ChargedEV next week, but just want advice if what am being told makes sense?
Do you know what size your fuse was before you had it upgraded?
Assuming it was 60A, you've added an extra 40A capacity, and an extra 32A load so they are effectively saying that 32 is more than 40 but 16 is less than 40. I'd ask them to explain how this is the case .
How could you have an 80A load with only a 60A fuse? An 'onsite electrical reading' implies they measured it, did they perhaps measure it with the car charging?
 

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Discussion Starter #15
Thanks for all your responses. ChargedEV came back to me say it was an error on their part. The 80A was including the 32A charger and that they should have set the charger output to 32A rather than 16A. A service engineer will be coming out to check over my unit.
 

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If they really calculated your existing demand at 80A they should have
Thanks for all your responses. ChargedEV came back to me say it was an error on their part. The 80A was including the 32A charger and that they should have set the charger output to 32A rather than 16A. A service engineer will be coming out to check over my unit.
Hands up and a fix plan. That’s what you need when a mistake is made.
 
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