S
sedgy34
I've seen the Nic doing a 1 day course on this " really" they are just after the money yet again
Discuss Electric car charging pods in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net
Sorry I was called away just as I was posting. I was pretty much saying what you say, why get accreditation to do a standard install.Sorry Richard, missed the point of your post, If you want to, you can get accreditation to f**t .... What's the point of the accreditation, what's the benefit.. Who does it, what's the cost ... Why would I bother...
Here is the website for the one I was being pitched:
Free Charging Stations - Zero Carbon World
and given the existence of this: Code of Practice for Electric Vehicle Charging Equipment Installation - The IET I don't see much need for specialised training courses for experienced electricians.
Surly a unit like that could just have a 3 pin plug on it, at the end of the day it is just a battery charger but in a big flashy case...
24kWh @ say 15p/kwh = 0 to full for £3.60 mmmm and Range ~ 100m (New European Driving Cycle - Wikipedia) = 0.36p/mile
Yes, but it would need to be a very big 3 pin plug.
If you do some basic calcs:
The sign says empty to full in less than 30 minutes. A Nissan Leaf (for example) has a battery capacity of 24kWh.
So, you're filling the battery at a rate of 24kWh in half an hour, ie 48kWh per hour, =48kW.
At 230V, 48kW =209A. That's a big plug!
Or, more likely, on a 3 phase supply at about 70A.
The numbers will vary from car to car, but this isn't going to be too far out.
This is the spec for the Nissan Leaf,
The port on the left is for level-3 (480-V, 125 A) charging; the port on the right is for level-1 (120 V, 12 A) & level-2 (240 V, 30 A) charging. The plug for the right port is an SAE-J1772 standard plug. The plug for the left level-3 port is aCHAdeMO standard plug (up to 62.5 kW).
Bow to some of your expertise on this, but the max for fast charging is 125A for the fast charge, so 3 phase as you stated, or trickle charge is/can be single phase 30A.
If you put 209A into the batteries it would just boil them, not that I would recommend to fast charge them often at 125A either as it would reduce the battery service life tremendously.
The slower you charge a DC battery the longer it will last.
I hope this helps.
Actually 3.6p/mile
or perhaps half this if done overnight on E7?
what this doesn't take into account (and neither does the advertising for the cars, unsuprisingly) is the enormous cost of replacing the batteries in a few years time.
7 years of servicing a porsche or a M5 etc isn't any cheaper (electric cars require less frequent break pad swaps as well), the next 10 years you're going to have start replacing gaskets, sensors, clutches, exhaust& emissions controls (EGRs and DPFs are a good example) etc which you won't on an electric vehicle
what they also don't tell you is battery performance will deteriorate over time, so although it may get you to work now, it may not in 5 years time.
Iirc Tesla guarantees their batteries to x% for 8 years, I use Tesla as the example as they seem to be one of the few companies that are putting serious effort behind it instead of doing conversions of existing cars
Also, if you look at whole life emissions rather than just tailpipe emissions, they are considerably more poluting than most other cars out there.
Only if we are going back to Ni-Mh or Ni-cd batteries (we're not) and going to carry on using coal and gas (hopefully we're not). That argument tends to miss half the point of the move to electric vehicles is because vehicle pollution kills thousands every year, diesel fumes are particularly notorious
bbc.co.uk/news/science-environment-17704116
nextbigfuture.com/2011/03/deaths-per-twh-by-energy-source.html
unless your going to TT every outside socket and every set of outside lights why do you need to TT this? It's just an outside socket and it only takes the equipotential zone outside the house in the same was as an outside socket to outside lights, and less so than a detached garage, which, I was told by my assessor and ELECSA does not need to be TT as long as it's not too far from the house (they declined to define 'not too far!'
what this doesn't take into account (and neither does the advertising for the cars, unsuprisingly) is the enormous cost of replacing the batteries in a few years time. That and the high initial cost of these vehicles means they are about the same running costs as a normal mid range car over the average lifetime.
what they also don't tell you is battery performance will deteriorate over time, so although it may get you to work now, it may not in 5 years time.
Also, if you look at whole life emissions rather than just tailpipe emissions, they are considerably more poluting than most other cars out there.
The whole electric car thing is a case of the kings new clothes.
rapid charging is a boost charge to top the battery up, you need to trickle charge it when you get home to fully charge the battery and mainatin it's life expectancy
The IET guidance note says that because in the case of a neutral fault the entire car could become live and due to the large area of potentially live metal they recommend a TT system for EV charging points where the vehicle or charging point may be outside. They also say a risk assessment should be carried out to ensure safety and that no conductive parts of a TNCS system should be within 10m of the TT installation and that the earth potential zone of the earth rod should not interact with the TNCS equipotential zone.
(Ha Ha)
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