I agree Emergency is to vague. Like can you use Granny charger in a caravan or camping because there is nowhere else to charge? I think it should be more specific than just that. But also if something is designed to run for 26h non stop then it should he made safe to run for such time. It seems kind of crazy to create a charger and then tell people not to use itI think they should be more specific. If repeat charging with the granny over a long period of time is not recommended they should say that and why and what installation/sockets can make it right. Emergency is too vague - I take it as when you can’t find an alternative and are very low on battery - others may interpret differently. Not just MG but all manufacturers. Will it take an accident/fire before they are forced to?
This subject has been discussed in another thread.Like can you use Granny charger in a caravan or camping because there is nowhere else to charge?
You will have no problems. I have installed an outside weatherproof socket and have the 3 Pin Ohme Smart Charger fitted to the wall and do exactly as you intend. The current draw will be 10 amps which is not excessive. The socket is on a spur from a 32A Ring and the feed to that socket is 2.5mm 3 core. The weakest part of the system is the 13 amp fuse in the plug of the Ohme charger followed by the 1.5mm 3 core flex on the Ohme charger. I too use the 4 hour Octopus Go window and manage to load about 9.5Kw to the car in that period. That's about 2.4Kw loading. To give you an idea and to allay the scare mongering that you are going to burn alive in your bed, most built in ovens are plug in 13A devices and operate for 2 to 3 hours cooking on most days with over a 2Kw load. In short, the socket in the plug will not normally be a source of any heat dissipation. Heat can only be generated where there is resistance to current flow. Normally in times gone by, that would be due to poor connections of cables in sockets or plugs, normally due to incorrect torque on the clamp screws or the wrong size of cable. Luckily all modern appliances come with preformed plugs and as long as your feed socket is on a 32A ring and in good condition you should be fine. My only concern, and it's only a mild one, would be the current rating on the timer plug and how resilient that is to 4 hours at 10 Amps. If it is from a reputable source then I think all should be fine.I intend to use my granny charger every night for 4hrs on the cheap energy tariff, since I found out my house is on a looped supply makes installing a 7kw troublesome. I don't do a huge amount of miles since I work from home.
I've had a few trial runs during the daytime. Its via an Amazon Smart Plug (13amp) for the scheduling and after a few hours the plug is only mildly warm. I'll keep an eye on it before I try it overnight (with a new smoke detector installed above!).
Thank you for the detailed post @Joe McAndrew, greatly appreciated.You will have no problems. I have installed an outside weatherproof socket and have the 3 Pin Ohme Smart Charger fitted to the wall and do exactly as you intend. The current draw will be 10 amps which is not excessive. The socket is on a spur from a 32A Ring and the feed to that socket is 2.5mm 3 core. The weakest part of the system is the 13 amp fuse in the plug of the Ohme charger followed by the 1.5mm 3 core flex on the Ohme charger. I too use the 4 hour Octopus Go window and manage to load about 9.5Kw to the car in that period. That's about 2.4Kw loading. To give you an idea and to allay the scare mongering that you are going to burn alive in your bed, most built in ovens are plug in 13A devices and operate for 2 to 3 hours cooking on most days with over a 2Kw load. In short, the socket in the plug will not normally be a source of any heat dissipation. Heat can only be generated where there is resistance to current flow. Normally in times gone by, that would be due to poor connections of cables in sockets or plugs, normally due to incorrect torque on the clamp screws or the wrong size of cable. Luckily all modern appliances come with preformed plugs and as long as your feed socket is on a 32A ring and in good condition you should be fine. My only concern, and it's only a mild one, would be the current rating on the timer plug and how resilient that is to 4 hours at 10 Amps. If it is from a reputable source then I think all should be fine.
My installation including the Ohme Charger was less than £250. I didn't qualify for the grant of course as it's not considered as a fixed installation but it's as good as and if you can survive on slower charge rates it certainly saves the hassle of additional work on the distribution panel, running 10m armoured cables or possible difficulties with earthing spikes etc.
You will have no problems. I have installed an outside weatherproof socket and have the 3 Pin Ohme Smart Charger fitted to the wall and do exactly as you intend. The current draw will be 10 amps which is not excessive. The socket is on a spur from a 32A Ring and the feed to that socket is 2.5mm 3 core. The weakest part of the system is the 13 amp fuse in the pluof the Ohme charger followed by the 1.5mm 3 core flex on the Ohme charger. I too use the 4 hour Octopus Go window and manage to load about 9.5Kw to the car in that period. That's about 2.4Kw loading. To give you an idea and to allay the scare mongering that you are going to burn alive in your bed, most built in ovens are plug in 13A devices and operate for 2 to 3 hours cooking on most days with over a 2Kw load. In short, the socket in the plug will not normally be a source of any heat dissipation. Heat can only be generated where there is resistance to current flow. Normally in times gone by, that would be due to poor connections of cables in sockets or plugs, normally due to incorrect torque on the clamp screws or the wrong size of cable. Luckily all modern appliances come with preformed plugs and as long as your feed socket is on a 32A ring and in good condition you should be fine. My only concern, and it's only a mild one, would be the current rating on the timer plug and how resilient that is to 4 hours at 10 Amps. If it is from a reputable source then I think all should be fine.I intend to use my granny charger every night for 4hrs on the cheap energy tariff, since I found out my house is on a looped supply makes installing a 7kw troublesome. I don't do a huge amount of miles since I work from home.
I've had a few trial runs during the daytime. Its via an Amazon Smart Plug (13amp) for the scheduling and after a few hours the plug is only mildly warm. I'll keep an eye on it before I try it overnight (with a new smoke detector installed above!).
The Ohme scheduling works well with my Octopus Go and it has a built in SIM to get updated on cheap rate timings. The interface on the Phone App takes a little figuring out and as the MG5 doesn't have the built in software then the Phone App % are not true.Thank you for the detailed post @Joe McAndrew, greatly appreciated.
I was indecisive regarding either the Ohme charger or sticking with the MG one on a smart plug. I did look into it but thought I'd give the smart plug option a chance first before buying the Ohme. Does the scheduling work well with the Ohme, and is it fully weatherproof?
The smart plug is an Amazon original (£25) and rated at 13 amps, I didn't want to risk a cheap one. It does get a little warm but is very, very mild.
This is connected to a 10m extension lead which is rated for EV charging, fully unwound, then finally into the MG granny.
Because using regular wall sockets at full drawn speed isn't exactly recommended. Imagine leaving your blender at full power turn on for 26 hours and how good that would be for your electric sockets.
It's fine in a pinch when there is no other charger nearby but not so great as a long term solution.
Here is example of why this isn't great especially on older installations.
There is no way I would for example leave car charging over night from the regular wall socket unsupervised.