32A Commando socket instead of a dedicated EV charger?

born_again

Reed_Richards said:

born_again said:

Go for a proper wall box to charge car. It will pay for itself in the long run & add value to your home.

A wall box might give you access to some fancy tariffs which mean that you can charge at 7.5p per kWh instead of 9.5 p/kWh.  So saving 2 p per kWh, a wall box costing £1000 would pay for itself after 50,000 kWh.  If your EV does 3 miles to the kWh then the wall box pays for itself after 150,000 miles of EV driving.  150,000 miles is a very long run!    

But you are forgetting that a granny charger will not charge a car overnight to same level. 
Add in, as I said all my charges were in daytime @ 7.5p rather then the norm of 29.56p so a further saving of 22p

In my case below I'm saving around 30 hours in terms of charging time. 

Battery Size	Granny Charger	7 kW Charger
40 kWh battery	20-27 hours	5-7 hours
50 kWh battery	25-33 hours	6-8 hours
60 kWh battery	30-40 hours	8-10 hours
70 kWh battery	35-47 hours	9-11 hours

I get it's going to take time to claw the cost back. But speed & the safety aspect are well worth it. Many manufactures say only to use a granny charger in emergencies. As they are well aware that many home electrics are not up to the draw over extended periods that is required to charge a EV.

born_again

Gerry1 said:

@born_again

'GOM currently @300'

2 many TLAs 4 me !😟

Lost me there 🤷‍♀️

Gerry1

born_again said:

Gerry1 said:

@born_again

'GOM currently @300'

2 many TLAs 4 me !😟

Lost me there 🤷‍♀️

I didn't understand 'GOM currently @300'.

Too many Three-Letter Acronyms for me !

macgyver

Thank you for your wise words.
I have decided to go for the EV charger with the fittings. As it sounds much safer. I got a deal with Rolec smart charger to fitted with MCD and it will be less than 900.
Thanks again. 
Just need to switch to octopuses ev tariff. My car qualifies for that even though the charger doesn't. 
I understand, I will have to get octopus standard first and then a smart meter and ev tariff 
Thanks

born_again

Gerry1 said:

born_again said:

Gerry1 said:

@born_again

'GOM currently @300'

2 many TLAs 4 me !😟

Lost me there 🤷‍♀️

I didn't understand 'GOM currently @300'.

Too many Three-Letter Acronyms for me !

GOM is the only one used.

Guess O Meter. Anyone that has a EV will know that 👍

Ectophile

Commando sockets are widely used in industry because they are really good plugs/sockets.  They are water resistant (but not waterproof), and don't get hot when used for hours on end at high currents.

You will still need some sort of charger.  The car expects to talk to a charger at the start of a charging session.  The blob of electronics in a "granny lead" is the charger, so far as the car is concerned.

Beware of cutting the 13A plug off a granny lead and wiring on a commando plug instead.  You may find that the power cable has 5 wires: live, neutral, earth and 2 wires for a temperature sensor. If you chop the wires to the temperature sensor, the granny lead will refuse to switch on.

Reed_Richards

born_again said:

Reed_Richards said:

born_again said:

Go for a proper wall box to charge car. It will pay for itself in the long run & add value to your home.

A wall box might give you access to some fancy tariffs which mean that you can charge at 7.5p per kWh instead of 9.5 p/kWh.  So saving 2 p per kWh, a wall box costing £1000 would pay for itself after 50,000 kWh.  If your EV does 3 miles to the kWh then the wall box pays for itself after 150,000 miles of EV driving.  150,000 miles is a very long run!    

But you are forgetting that a granny charger will not charge a car overnight to same level. 
Add in, as I said all my charges were in daytime @ 7.5p rather then the norm of 29.56p so a further saving of 22p

In my case below I'm saving around 30 hours in terms of charging time. 

Battery Size	Granny Charger	7 kW Charger
40 kWh battery	20-27 hours	5-7 hours
50 kWh battery	25-33 hours	6-8 hours
60 kWh battery	30-40 hours	8-10 hours
70 kWh battery	35-47 hours	9-11 hours

I get it's going to take time to claw the cost back. But speed & the safety aspect are well worth it. Many manufactures say only to use a granny charger in emergencies. As they are well aware that many home electrics are not up to the draw over extended periods that is required to charge a EV.

I'm nor forgetting that, but you have now switched from a case made purely on cost to one based on convenience.

I have a granny charger and my car has a 50 kWh battery so if I charge for 7 hours a night it takes me about 3 nights to charge the battery from zero to 100% (4 nights if I accept your pessimistic figures).  But I only need charge from 0 to 100% when I've been on a long journey and just made it home on one day and want to undertake another long journey the following day.  But that rarely if ever happens, so there's no inconvenience to me.

Many manufacturers say to only use a granny charger in emergencies.  Many experts say that batteries prefer to be trickle-charged.  Take your pick!  

markin

Reed_Richards said:

born_again said:

Reed_Richards said:

born_again said:

Go for a proper wall box to charge car. It will pay for itself in the long run & add value to your home.

A wall box might give you access to some fancy tariffs which mean that you can charge at 7.5p per kWh instead of 9.5 p/kWh.  So saving 2 p per kWh, a wall box costing £1000 would pay for itself after 50,000 kWh.  If your EV does 3 miles to the kWh then the wall box pays for itself after 150,000 miles of EV driving.  150,000 miles is a very long run!    

But you are forgetting that a granny charger will not charge a car overnight to same level. 
Add in, as I said all my charges were in daytime @ 7.5p rather then the norm of 29.56p so a further saving of 22p

In my case below I'm saving around 30 hours in terms of charging time. 

Battery Size	Granny Charger	7 kW Charger
40 kWh battery	20-27 hours	5-7 hours
50 kWh battery	25-33 hours	6-8 hours
60 kWh battery	30-40 hours	8-10 hours
70 kWh battery	35-47 hours	9-11 hours

I get it's going to take time to claw the cost back. But speed & the safety aspect are well worth it. Many manufactures say only to use a granny charger in emergencies. As they are well aware that many home electrics are not up to the draw over extended periods that is required to charge a EV.

I'm nor forgetting that, but you have now switched from a case made purely on cost to one based on convenience.

I have a granny charger and my car has a 50 kWh battery so if I charge for 7 hours a night it takes me about 3 nights to charge the battery from zero to 100% (4 nights if I accept your pessimistic figures).  But I only need charge from 0 to 100% when I've been on a long journey and just made it home on one day and want to undertake another long journey the following day.  But that rarely if ever happens, so there's no inconvenience to me.

Many manufacturers say to only use a granny charger in emergencies.  Many experts say that batteries prefer to be trickle-charged.  Take your pick!  

Only works if your work place is 22 miles away or under, If my math is about right, Unless you can charge at work.

I think most EV tariffs will be moving to smart chargers only eventually, And any house on Gas would have to pay a premium day rate for home use to use E7 just for a EV.

Reed_Richards

markin said:

Reed_Richards said:

born_again said:

Reed_Richards said:

born_again said:

Go for a proper wall box to charge car. It will pay for itself in the long run & add value to your home.

A wall box might give you access to some fancy tariffs which mean that you can charge at 7.5p per kWh instead of 9.5 p/kWh.  So saving 2 p per kWh, a wall box costing £1000 would pay for itself after 50,000 kWh.  If your EV does 3 miles to the kWh then the wall box pays for itself after 150,000 miles of EV driving.  150,000 miles is a very long run!    

But you are forgetting that a granny charger will not charge a car overnight to same level. 
Add in, as I said all my charges were in daytime @ 7.5p rather then the norm of 29.56p so a further saving of 22p

In my case below I'm saving around 30 hours in terms of charging time. 

Battery Size	Granny Charger	7 kW Charger
40 kWh battery	20-27 hours	5-7 hours
50 kWh battery	25-33 hours	6-8 hours
60 kWh battery	30-40 hours	8-10 hours
70 kWh battery	35-47 hours	9-11 hours

I get it's going to take time to claw the cost back. But speed & the safety aspect are well worth it. Many manufactures say only to use a granny charger in emergencies. As they are well aware that many home electrics are not up to the draw over extended periods that is required to charge a EV.

I'm nor forgetting that, but you have now switched from a case made purely on cost to one based on convenience.

I have a granny charger and my car has a 50 kWh battery so if I charge for 7 hours a night it takes me about 3 nights to charge the battery from zero to 100% (4 nights if I accept your pessimistic figures).  But I only need charge from 0 to 100% when I've been on a long journey and just made it home on one day and want to undertake another long journey the following day.  But that rarely if ever happens, so there's no inconvenience to me.

Many manufacturers say to only use a granny charger in emergencies.  Many experts say that batteries prefer to be trickle-charged.  Take your pick!  

Only works if your work place is 22 miles away or under, If my math is about right, Unless you can charge at work.

I think most EV tariffs will be moving to smart chargers only eventually, And any house on Gas would have to pay a premium day rate for home use to use E7 just for a EV.

You'll have to show your working if I am to understand your 22 miles comment. 

If I managed to get my car battery to 100% by Monday morning then did a weekday commute of 60 miles round trip at 3 miles per kWh then on Monday evening my 50 kW battery would have used up 20 kWh but I could add 15 kWh overnight so that would take the battery down to 95% on Tuesday morning and 75% by Saturday morning.  So I would need to do little driving over the weekend to get back up to 100% charge by Monday morning.  I would be driving 300 miles a week, take off two weeks for a holiday without the car and that's 15,000 miles a year, which is a good deal more than the average motorist.  It's certainly not the driving I myself actually do.

Any house on gas would not mind paying a premium day rate for electricity because they don't use very much of it.  It's a house run on electricity, like mine, that would have to worry.  At the moment I am charging the battery that goes with my solar panels overnight, and heating my hot water cylinder at the cheap rate to offset the day rate cost.  But ultimately some of the money I am not spending on petrol will go to fund my winter heating.  I'll see how that works out.          

markin

Reed_Richards said:

markin said:

Reed_Richards said:

born_again said:

Reed_Richards said:

born_again said:

Go for a proper wall box to charge car. It will pay for itself in the long run & add value to your home.

A wall box might give you access to some fancy tariffs which mean that you can charge at 7.5p per kWh instead of 9.5 p/kWh.  So saving 2 p per kWh, a wall box costing £1000 would pay for itself after 50,000 kWh.  If your EV does 3 miles to the kWh then the wall box pays for itself after 150,000 miles of EV driving.  150,000 miles is a very long run!    

But you are forgetting that a granny charger will not charge a car overnight to same level. 
Add in, as I said all my charges were in daytime @ 7.5p rather then the norm of 29.56p so a further saving of 22p

In my case below I'm saving around 30 hours in terms of charging time. 

Battery Size	Granny Charger	7 kW Charger
40 kWh battery	20-27 hours	5-7 hours
50 kWh battery	25-33 hours	6-8 hours
60 kWh battery	30-40 hours	8-10 hours
70 kWh battery	35-47 hours	9-11 hours

I get it's going to take time to claw the cost back. But speed & the safety aspect are well worth it. Many manufactures say only to use a granny charger in emergencies. As they are well aware that many home electrics are not up to the draw over extended periods that is required to charge a EV.

I'm nor forgetting that, but you have now switched from a case made purely on cost to one based on convenience.

I have a granny charger and my car has a 50 kWh battery so if I charge for 7 hours a night it takes me about 3 nights to charge the battery from zero to 100% (4 nights if I accept your pessimistic figures).  But I only need charge from 0 to 100% when I've been on a long journey and just made it home on one day and want to undertake another long journey the following day.  But that rarely if ever happens, so there's no inconvenience to me.

Many manufacturers say to only use a granny charger in emergencies.  Many experts say that batteries prefer to be trickle-charged.  Take your pick!  

Only works if your work place is 22 miles away or under, If my math is about right, Unless you can charge at work.

I think most EV tariffs will be moving to smart chargers only eventually, And any house on Gas would have to pay a premium day rate for home use to use E7 just for a EV.

You'll have to show your working if I am to understand your 22 miles comment. 

If I managed to get my car battery to 100% by Monday morning then did a weekday commute of 60 miles round trip at 3 miles per kWh then on Monday evening my 50 kW battery would have used up 20 kWh but I could add 15 kWh overnight so that would take the battery down to 95% on Tuesday morning and 75% by Saturday morning.  So I would need to do little driving over the weekend to get back up to 100% charge by Monday morning.  I would be driving 300 miles a week, take off two weeks for a holiday without the car and that's 15,000 miles a year, which is a good deal more than the average motorist.  It's certainly not the driving I myself actually do.

Any house on gas would not mind paying a premium day rate for electricity because they don't use very much of it.  It's a house run on electricity, like mine, that would have to worry.  At the moment I am charging the battery that goes with my solar panels overnight, and heating my hot water cylinder at the cheap rate to offset the day rate cost.  But ultimately some of the money I am not spending on petrol will go to fund my winter heating.  I'll see how that works out.         

 I forgot nightly top ups, but if you have 2 cars and have to alternate charging or drive a good distance on the weekend the numbers get worse but probably just about works out.

Then the is also a lot of cars out that don't seem to get 3 miles per kwh