Captainfieldmouse

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HS PHEV
For various reasons I won’t go into now the only way I can charge my HS PHEV at home is to use a 3 pin granny charger. This is absolutely fine as a 20 kWh charge can be done overnight. However I’m only getting around 2.4 kW charging whereas I was expecting closer to 3.3 kW. Charger is set to 13 amp. My spark installed an EV rated outdoor socket so should be getting a faster charge rate than I am. Or have I missed something?
 
Hi. I have the previous version, but I can tell you now, 10amp is max for prolonged periods of use, even for an ev rated socket.
I tried mine (charger) set to 13amp and it was fine for a short while but it soon burnt the 13 A fuse out and damaged the EV rated socket itself (burnt and bubbled surface). Replaced fuse, reduced to 10 amp (2.4 kW approx.) and it has been fine since, several months use and used every night, not a hint of burning to the surface of the plug or socket.
So whilst it is capable of hitting 3.4 kW approx at 13 amps, the socket will not stand it, nor the charger, in my experience. So please stick to 10 amps and 2.4 kW charge rate 👍🏼
 
Some after market Granny units can be adjustable to provide a higher rate of charge, but OEM units tends to air on the side of safety & caution.
This is to prevent the chance of producing too much heat at both the socket outlet & three pin plug.
Also when you provide a Granny charger to a new owner, the manufacture has absolutely no idea of the condition / age of the electrics that different people are using in their homes.
The age of the property has no clear relevance really, as the property could be 80 years old, but has been rewired to the latest spec's etc.
The increase in charging speed between 10 amps and 13 amps gained, is marginal and not worth the risk of the extra strain on the system long term.
 
Hi. I have the previous version, but I can tell you now, 10amp is max for prolonged periods of use, even for an ev rated socket.
I tried mine (charger) set to 13amp and it was fine for a short while but it soon burnt the 13 A fuse out and damaged the EV rated socket itself (burnt and bubbled surface). Replaced fuse, reduced to 10 amp (2.4 kW approx.) and it has been fine since, several months use and used every night, not a hint of burning to the surface of the plug or socket.
So whilst it is capable of hitting 3.4 kW approx at 13 amps, the socket will not stand it, nor the charger, in my experience. So please stick to 10 amps and 2.4 kW charge rate 👍🏼
Thanks! My external socket is EV rated and is specifically designed for max kw charging. Electrician showed me the max output on a tester and it was up to 3.4kw. Can’t help thinking it’s at the car end of things?
 
Some after market Granny units can be adjustable to provide a higher rate of charge, but OEM units tends to air on the side of safety & caution.
This is to prevent the chance of producing too much heat at both the socket outlet & three pin plug.
Also when you provide a Granny charger to a new owner, the manufacture has absolutely no idea of the condition / age of the electrics that different people are using in their homes.
The age of the property has no clear relevance really, as the property could be 80 years old, but has been rewired to the latest spec's etc.
The increase in charging speed between 10 amps and 13 amps gained, is marginal and not worth the risk of the extra strain on the system long term.
Thanks. My electrician upgraded my MCB only 6 months ago and he assured me that my domestic wiring could definitely handle the full 13a. The granny charger is set to 13a and it stays that way through charging without reducing to 10 or 6a. My external socket is EV rated too so shouldn’t be an issue.
It’s not a showstopper as I still get a full charge overnight, but it would be good if I could get a ‘top-up’ charge slightly quicker during the day
 
I think it also depends where you are seeing the 2.4kW. Is this on the Granny charger display i.e. power going into the vehicle, or on the infotainment screen on the charging tab, as that will show what is going into the battery. The difference will be the CCU losses inherent in all systems.
 
Good shout, hadn’t considered that. The granny charger hovers around 2.8 to 3 kw, the MG app around 2.4kw. Never sat in the car whilst charging as normally done overnight, but will check next time. Thanks again
 
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