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Discussion Starter · #1 ·
Was just about to press the trigger on my first EV Id3 when the contractor who i had just paid north of £550.00 to supply and fix a Charger in conjunction with OctopusEnergy, I’d got the date booked in then yesterday i got an email to say there was a problem with my property i have looped supply! With next door. I’ve been told they got in touch with the power provider and they would confirm on Monday ! wether it’s possible or have I’ve seen elsewhere a lot work and money!
I already have a commando socket professionally wired up approximately 4 mtrs from where the car would be parked!
within 10 minutes walking distance of home I’ve a choice of 3 charging points in my home town!
so that is why I was asking if anyone just uses the granny charger, for there experiences and findings if it can be done long term?
And advice and suggestions would be greatly appreciated
 

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Kia E Niro 4
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I've used a granny charger since getting my EV 5 months ago, I admit I've had some freebies at Tesco and Osprey, but it works OK even using an extension lead, just check it doesn't get too hot, the longest I left it was 12hours during the day so I could monitor the situation. The car operates it's four hour off peak charge, and although that's not much on a 2Kw granny you can do it every night if you need to, which covers the mileage that I do. YMMV
 

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My parents do this with their Leaf (40), they’ve had it for just over 2years now…
I also only have this option when I go to visit them, but it’s been fine 🙂
 

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I am also looking to get an EV in the next few months (probably an Enyaq IV60) will probably do 6k miles a year so charging of the vehicle would likely be Once a week and sometimes less and very Occasionally more.
Like you I also have a 50kw charger less than a mile away that does not get used very often and plenty more within 2 miles. I am thinking rather than spending upwards of £500 + the hassle to get a wall charger installed I might initially try and get along with using the faster chargers locally and in the case of emergency use a granny charger. A £500-600 outlay for a wall charger pays for a lot of charging on public chargers before you get your money back.

I know at home you have the convenience and slightly cheaper charging but where my nearest charger is I can park for an hour or so for a top up and look in at the local Wetherspoons 100mtrs away for a coffee and surf on the net using their wi-fi for £1😁
 

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I used a granny charger exclusively for charging my Golf GTE for three and a half years without any trouble.

Admittedly this started just six years after the house was totally rewired and I was using an existing waterproof external socket. Also, after I learned to worry from reading this forum, I did check for heating of the plug and socket regularly for a while. Slightly warm but nothing alarming.

My purpose was to keep the charging power low enough so that much of the electricity came from my solar panels without any clever kit.
 

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Hyundai Ioniq 28
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Is the commando socket a 32 amp version? If so then an OHME charger can be specified to take power from such a socket. And if the house electricity is supplied by Octopus that unit is available at a discounted price of £199. A safer solution than a 13 amp granny charger.

But also, there are many instances where the DNO has to un-loop a supply if it is requested in connection with a car charger installation. Much depends on whether your house is first or second in that loop as it involves some groundwork and may require consent from the other party as there will be disruption to drives/gardens.
 

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Yep, I’ve only got a small battery hybrid, so have no problem using the original supplied charger for all my charging, at this point in time any installation of proper high capacity chargers isn’t necessary in my home. (I tend to buy cars on pcp so there may well be a few more cars yet before I decide to go full electric, in which case a proper home charger would definitely be required!)
 

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I used a granny charger exclusively for charging my Golf GTE for three and a half years without any trouble.

Admittedly this started just six years after the house was totally rewired and I was using an existing waterproof external socket. Also, after I learned to worry from reading this forum, I did check for heating of the plug and socket regularly for a while. Slightly warm but nothing alarming.

My purpose was to keep the charging power low enough so that much of the electricity came from my solar panels without any clever kit.
Fine but the ID3 battery is 5 times the size of the GTE. That’s a lot more time plugged in on the granny cable.

A 7kw charger is more convenient, opens up options of charging more than once a day from home and is arguably a little safer.

Granny is fine as a temp solution, but if you don’t see going back to an ICE bite the bullet and get it sorted.
 

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A 7kw charger is more convenient, opens up options of charging more than once a day from home and is arguably a little safer.
I'd just add that a properly protected charge point, or outlet, is a great deal safer than a granny lead, very much so if the electrcal installation is TN-C-S/PME. No granny lead, or portable charge point, has any protection from an open PEN fault. There are around 500 of these a year in the UK, and they can very easily cause the car body to rise to an unsafe touch voltage when plugged in, such that there may well be a severe electric shock risk.

A granny lead is fine for occasional use, with an outlet in good condition, but there is always the risk that there could be an open PEN fault, and it's quite possible that there would be no indication of this. The more time a car remains plugged in to an unprotected charge point like this, the higher the probability that it might be plugged in when there happens to be an open PEN fault on the distribution network outside the home. It may only happen ~500 times a year, so the probability is very low, but the consequences could be very severe.

I'd add that this risk doesn't stop me occasionally using a granny lead, but I do tend to never touch the body of the car whilst it is plugged in.

(edited to fix quote tag error)
 

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Rented house, LEAF30, coming up to 7 years with leafs, ~12k miles/year, only have granny cable charging. No issues.
 

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Most people will use a granny fine most of the time - I did quite happily for 9 months - then it burned out, smoked and nearly caught fire.

The problem is usually the socket.

That much power for extended periods pushes the socket to the limit, any problems, and I do mean any, will eventually start a cycle of overheating that can lead to fire.

CAN you just use a granny? Yes

SHOULD you use just a granny? No, absolutely not....
 

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Discussion Starter · #13 ·
Is the commando socket a 32 amp version? If so then an OHME charger can be specified to take power from such a socket. And if the house electricity is supplied by Octopus that unit is available at a discounted price of £199. A safer solution than a 13 amp granny charger.

But also, there are many instances where the DNO has to un-loop a supply if it is requested in connection with a car charger installation. Much depends on whether your house is first or second in that loop as it involves some groundwork and may require consent from the other party as there will be disruption to drives/gardens.
Hi thanks for your comments excuse my ignorance what is a OHME charger I can’t find any information on one any where from Octopus! I’m afraid finding out about the loop supply has knocked the wind out of my sales! After test driving the Id3 and being a Octopus customer I thought I’d got just what I was looking for!
 

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Hi thanks for your comments excuse my ignorance what is a OHME charger I can’t find any information on one any where from Octopus! I’m afraid finding out about the loop supply has knocked the wind out of my sales! After test driving the Id3 and being a Octopus customer I thought I’d got just what I was looking for!
Ohme Octopus discount offer 🙂
 

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Hyundai Ioniq 28
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Hi thanks for your comments excuse my ignorance what is a OHME charger I can’t find any information on one any where from Octopus! I’m afraid finding out about the loop supply has knocked the wind out of my sales! After test driving the Id3 and being a Octopus customer I thought I’d got just what I was looking for!
@Mofo has given the link above. That OHME charger would solve your initial problem quite cheaply as you are already an Octopus customer. You didn't confirm what power was going to your commando socket. If it is 32 amps then the OHME will work exactly like a standard wall unit and be much faster and safer than using a 13 amp socket.

You could also begin negotiations with the DNO over the looping. There is much pressure on them to unloop systems free if it is hindering the installation of an EVSE for car charging. As I said, a lot depends on the situation, and the groundwork that may be required if there will be disruption to the other person on that loop. But many times they can be persuaded to cooperate as they may need it unlooped themselves before 2030 when the pressure to move to an EV themselves starts to mount.
 

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Over 5 years with the 94 i3 and granny charger on the new circuits (8 years old) in our guest annexe, no issues at all and the plug doesn’t even get warm.

Also been driving for 50 years and always wore a seat belt, no issues there either as the smarties in here say. ;)
 

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Discussion Starter · #17 ·
Is the commando socket a 32 amp version? If so then an OHME charger can be specified to take power from such a socket. And if the house electricity is supplied by Octopus that unit is available at a discounted price of £199. A safer solution than a 13 amp granny charger.

But also, there are many instances where the DNO has to un-loop a supply if it is requested in connection with a car charger installation. Much depends on whether your house is first or second in that loop as it involves some groundwork and may require consent from the other party as there will be disruption to drives/gardens.
Just received the link for the OHME charging cable looks like an interesting option! would i have to have a 32 amp socket to get the best from it? And how could I find out if it’s 32 amp?
thanks for everyones help really appreciate it
 

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over the past couple of weeks I’ve been relying on the granny charger for reasons I won’t bore you with. For a top up of a few kW it can be acceptable, subject to everything said above, if you do longer journeys then it can be a problem to rely on it because of just how slow it is. Two longer runs back to back and you don’t have enough time to charge sufficiently. Given you have public chargers nearby you might get away with it

the Ohme cable can be current limited on request, so if your commando socket can’t support 32A the ohme could be set at 16, for example. This requires a support call to Ohme. It isn’t a permanent change and can be undone later, they just don’t let you change it regularly.

Ohme with your existing commando may not meet the earthing criteria. You’d need to check if your socket has an earth rod and either fit one or one of the PEN fault detection boxes. Earth rod is likely cheaper if feasible where the socket is situated.
 

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Just received the link for the OHME charging cable looks like an interesting option! would i have to have a 32 amp socket to get the best from it? And how could I find out if it’s 32 amp?
A 32amp system will add to the battery at around 25 miles per hour. A 16amp unit at 12 mph, and a granny charger at 7mph.

Perhaps you need a bit of advice from a local sparky to check your system and see if it's OK to use that commando for charging.
 

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Interesting thread. I am with the knowledgeable specialists on this one and no doubt in a few years time after a few horrendous incidents the powers that be will insist on wall boxes being installed and it being illegal to use the granny chargers not least if it means they can force people to use public chargers owned by mates🙄for my part my other half is not a trained electrician but knows enough about electrics to take it very seriously and we have fitted a smoke alarm in the area of the consumer box to detect any early symptoms should we have a problem having read of a fellow forum members experience of a fire. I do wonder if the newer vehicles no coming on stream with their bigger batteries will cause more problems as they will need to be plugged in for a much longer period.
 
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