charging

Difference between level 1, 2 and 3 chargers

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A photo of my Nissan Leaf, with the car charging port open and a Type 2 cable plugged in.

This is one of those blog posts where I’d wondered something, looked it up, and am now sharing what I’ve found out. When it comes to charging your electric car, you may hear the terms ‘level 2’ or ‘level 3’ charger being used. They’re not common terms in the UK, but you may encounter them in other countries – especially the US.

Level 1 chargers

A level 1 charger is, essentially, just a standard 3 pin plug like you have at home. Your electric car will probably come with an adaptor cable, with a 3 pin plug on one end, and a Type 2 plug on the other end. There’s usually a chonky box on the cable, known as an EVSE (Electric Vehicle Supply Equipment), that regulates the power flow. Colloquially, these are known as granny chargers.

In the UK, our standard power supply is 240 volts and 13 amps. Going back to GCSE Science, we know that power is the product of voltage and current (amps), so the maximum output is 3.1 kW. An electrician may be able to fit a waterproof external plug socket for you which is rated at 16 amps, upping the maximum power output to 3.8 kW. One of our neighbours had this done for charging their plug-in hybrid as it was cheaper than a dedicated car charger (level 2, as we’ll encounter in a bit).

In the US, the voltage is lower (typically 120 volts) but the current can be as high as 20 amps, depending on how it’s been wired. However, even a 20 amp socket in the US can only output a maximum of 2.4 kW due to the lower voltage.

A level 1 charger is therefore going to charge your car quite slowly – especially if you have a big battery. I have also seen photos of plug sockets that have melted due to continual use for charging electric cars. And it’s (probably) the least efficient; some tests suggest that 25% of the electricity doesn’t make it into your car’s battery and is lost as heat.

Level 2 chargers

Level 2 chargers are the dedicated electric car chargers that you can get fitted at home. In our case, we have a Rolec EVO unit, and this will be fitted to the outside of your house. In the UK, it’ll have a Type 2 connector, and will be capable of much higher current – up to 32 amps. That equates to (almost) 7.7 kW, which is the maximum that you can get on a single-phase electrical supply that is standard in UK homes.

My Rolec charger lets me vary the current, so I can set it below 10 amps if I’m not in a hurry and want to make the most of my solar panels. Level 2 chargers also incorporate EVSE inside them, so the cables just tend to have a standard type 2 plug on each end.

Many public chargers are also level 2 – especially older ones. Some may be connected to a three-phase electrical supply, which triples the power output to 22 kW. You’ll generally find these at places where you can park your car all day.

I personally describe level 2 chargers as ‘medium’ speed, but a full charge at 7 kW will take a long time for larger vehicles. For our Nissan Leaf, a full charge (from 0 to 100%) would take 6 hours and 30 minutes, although that’s partly because it can only accept 6.6 kW from level 1 or 2 chargers.

Level 3 chargers

Level 3 chargers are the rapid and ultra-rapid chargers that can output 40 kW or more – some can do up to 150 kW. Unlike level 1 and 2, these chargers use DC (Direct Current) rather than the standard AC (Alternating Current) that you would get from a standard 3-pin plug. They also use different plugs – CCS2 is the most common, but some cars, like our Nissan Leaf, use a competing standard called CHAdeMO. You’ll also find that these are almost always ‘tethered’ chargers that include their own cable, so you won’t need to plug your own cable in.

I doubt you would be able to get a level 3 charger installed at home, as they’re expensive and would probably need planning permission and authorisation from the electricity distribution network operator (DNO). But increasing numbers of these rapid chargers are available when out and about, and especially at places like motorway service stations where you need to charge quickly whilst en-route somewhere.

How fast your car will charge will again depend on its maximum charging speed. Our Nissan Leaf, when using CHAdeMO, can only accept up to 46 kW. Still, that means a full charge in less than an hour.

DC chargers are also more efficient, in that you’re less likely to lose power as heat than AC chargers. As these chargers are generally the ones you pay a premium for, that’s a good thing as almost all the electricity you pay for will make it into your car’s battery. However, regular use of rapid chargers can degrade the battery more quickly.

When you should (and shouldn’t) charge your electric car to 100%

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Something to bear in mind about electric cars is that their batteries will degrade slightly over time. As the batteries age, the maximum range obtainable from the batteries on a full charge will go down. How quickly this happens will depend on how you use and how you charge your car, and in this blog post, I’m going to talk about the impact of charging to 100% on your battery’s health.

In our previous diesel car, we would usually let the fuel tank run down until it was in the red zone (about 1/8 full) and then fill it up. The exceptions would be when we’re about to go on a long journey, and so we would fill up before departing to save having to stop off on the way.

With our electric car, we follow the advice of generally keeping the charge level between 20% and 80%. A quick web search finds several different articles backing this up. But we do also charge to 100% sometimes:

When you should charge to 100%

If you’re about to go on a journey where you need the range, then charging up to 100% makes sense. This is especially so if you’re charging at home, as this will be much cheaper than paying to do so at a public charger. There’s no point in only charging to 80%, if this would mean that you have to stop and charge on your journey, when a 100% charge would allow you to complete your journey without a break.

Occasional charges to 100% are probably not going to contribute significantly to your battery’s degradation.

When you shouldn’t charge to 100%

The batteries in your car tend to work best at between 20% and 80% charge. Going outside this range can stress the battery, and doing so regularly may result in them degrading faster. This is also why rapid public chargers slow down the rate of charge after your battery reaches 80%.

Therefore, if you’re not planning a long journey, then it’s best to stop charging your car at around 80%. It’s also worth noting that some cars will limit the effects of regenerative braking above 80% charge, so your driving will be less efficient until your battery drops below 80% charge. Route planning apps should estimate how much charge you will need for your journey, and whether it’s worth charging to 100%.

Also, if you’re using a public charger and don’t need a full charge, then it’s courteous to stop charging at 80% and move your car to a non-charging bay, so that someone else can use it.

Is battery degradation a big problem?

Battery degradation is something that owners of electric cars should be somewhat aware of, but I also think that it’s less of an issue than some make it out to be. We didn’t buy our Nissan Leaf new – it was three and a half years old, and with around 33,000 miles on the clock. Its battery capacity isn’t quite as much as it would have been fresh from the factory, but we’re talking about a reduction of maybe four miles, which is less than 2%. If you extrapolate that, then by the time the car is around 10 years old, the battery degradation may reach 5-6%. But that still means that the battery can hold almost as much charge as new.

Obviously, we’ll do what we can to try and preserve the battery’s capacity for as long as possible, although there will be the occasional 100% charge when necessary.

Route planning apps for electric cars

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A screenshot showing various route planning apps, including Google Maps, Apple Maps, ZapMap, Electroverse, PlugShare and ABRP

Since I first got my own car (10 years ago), we’ve used Google Maps for directions. I’ve never bothered with a stand-alone satnav, and our Nissan Leaf is the first car that we’ve owned to have one built-in.

With our electric Nissan Leaf, Google Maps is still our go-to app for route planning and directions, but there are some other apps that I’ve considered. Here’s an overview of them.

Google Maps

Starting with Google Maps. Its support for electric vehicles is okay; you can tell it that your car is an electric vehicle, and it’ll offer the most energy-efficient routes as well as the fastest. Remember, electric and hybrid cars have regenerative braking; in a petrol or diesel car, a shorter but slower route may only use a little less fuel, but a lot less energy in an electric car. On one recent journey, a slower but more direct route took five minutes longer, but used 29% less charge and meant that would get there and back without having to recharge en route.

You can also tell Google Maps what plugs your car supports. Our Nissan Leaf, for example, can charge from a 3-pin plug, a Type 2 AC charger and CHAdeMO DC chargers. Then, when you switch your car from being petrol/diesel to electric, it’ll no longer offer to show you directions to petrol stations, but to public electric car chargers instead.

Google Maps will show public chargers from the majority of major operators, and their occupancy. However, compared to some of the other apps mentioned here, it won’t show all chargers.

If you have a really new electric car with Google Maps built-in, then it’ll know your car’s current charge and be able to add charging stops for long journeys. Our Nissan Leaf doesn’t – we can just use Google Maps through CarPlay or Android Auto. As such, it won’t automatically suggest charging stops on longer journeys.

Apple Maps

Note: I’m writing this about Apple Maps in iOS 18, which was current at the time of writing

I’m sure that Apple Maps works great, if you live in California. I don’t, and since Apple launched it 13 years ago in iOS 6, it’s been a disappointment. If you do live in California, or a supported country, then there are EV features available to you. But it appears that the UK either isn’t a supported country, or it just doesn’t work with my Nissan Leaf. Either way, for me, there are no special features available in Apple Maps.

I can’t even tell Apple Maps that I drive an electric vehicle, and so it still bubbles up petrol stations which are of limited use to me now. You can search for ‘charging point’ and get directions to charging points, but it can’t easily incorporate these into a route. It also recommended a charging point to me which didn’t actually exist.

ZapMap

ZapMap has probably the best list of UK electric car chargers. As well as listing all of those on the main charging networks, including availability, users can also add chargers themselves. These are often ‘destination chargers’ at places where you can visit, which may be offered for free and are not part of a larger network.

The app is ad-supported, and won’t work with CarPlay or Android Auto unless you pay for ZapMap Premium. This currently costs £5 per month, or £35 for a full year if paid in advance (£30 if you sign up before the end of the month). As well as hiding the ads, you get a free ZapMap RFID charging card (normally £10) and a 5% discount if you pay for certain public chargers through the ZapMap app. As I only use public chargers occasionally, I may consider the £5 per month option when needed, and then cancel.

The free app lets you plan a limited number of routes, which can then be sent to either Apple or Google Maps for navigation.

Octopus Electroverse

Electroverse is the public charging app from Octopus Energy. It doesn’t list as many chargers as ZapMap, as it focusses just on those on the major networks. However, it offers things like route planning, CarPlay and an RFID card for free, unlike ZapMap, and there are no adverts. It also looks nicer.

It’s worth noting that, by default, it’ll only show public chargers that are compatible with the Electroverse app and RFID card. This means that public chargers from Pod Point initially don’t appear, for example. You can turn this off if you want to prioritise seeing a wider range of chargers.

The route planning is quite good. You can tell it what car you drive, your start and end points, and how much charge you expect to start with. It’ll then calculate a route that includes stops at compatible chargers, and it’ll tell you how much you need to charge at each stop and how long it’ll take. You can then send the route to Google or Apple Maps. Note that in CarPlay mode, handoff is only to Apple Maps and not Google Maps, so bare that in mind.

PlugShare

PlugShare is another site that allows user contributions of public charger places. Unlike ZapMap, which is UK focussed, PlugShare is global. Its list of chargers is extensive, and even includes chargers which are ‘under construction’. I checked a couple of these locally, and found that, whilst there was planning permission in place for these, construction work hadn’t started. I think this is where Apple Maps may be getting its data from, but without the knowledge that they’re under construction.

It supports route planning, but this seems to be limited to showing public chargers on a given route. Unlike Electroverse, it didn’t tell me how much to charge up by and how long to stop for, and wouldn’t send the details to a mapping app. It supports CarPlay though.

ABRP – A Better Route Planner

A Better Route Planner is worth considering. It’s a full replacement for Apple Maps or Google Maps, and is designed for electric cars. Like with Electroverse, you can select your car and the starting charge, and it’ll plan routes to include car chargers.

CarPlay is limited to ABRP Premium, which also allows you to factor in weather conditions when driving, and to prefer chargers where there are toilets or children’s play areas. And, like Google Maps, ABRP Premium incorporates traffic data. It can also connect to live battery data in more cars, albeit in a somewhat roundabout way. For my Nissan Leaf, it needs an OBD2 adaptor and the Leaf Spy Pro app (£20) set up. ABRP Premium costs €5 per month, or €50 per year.

Combining the apps

At the moment, I’m using a combination of all three:

  • Google Maps for general navigation
  • Electroverse for calculating charge levels on a route, or incorporating charge points into a route plan
  • ZapMap for finding charger locations

It would be nice if Google Maps included charge levels in its route planner on cars that don’t have it built-in; that would minimise my need to use other apps. Still, by planning my routes in Electroverse and sending them to Google Maps, I can achieve most of the features of ABRP without their premium subscription. Once I’ve picked up an OBD2 adaptor that’s fully compatible with Leaf Spy, I may give ABRP another try though.

Some thoughts on the state of public electric car charging in 2025

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A photo of my Nissan Leaf, with the car charging port open and a Type 2 cable plugged in.

So we’re about a month into owning an electric car, and in that time we’ve taken it on two long distance trips – our holiday in Wales, and to the Midlands and Oxfordshire for a family birthday. As our Nissan Leaf only has a 150 mile range on a full charge, we were therefore reliant on public chargers to be able to continue our journeys. This post is therefore some collected thoughts on our experiences, in case you are thinking about switching to an electric car.

Availability of charging bays

Across the UK, there are almost 42,000 places you can charge an electric car, according to ZapMap, with each location offering an average of two chargers and three connectors. However, sometimes you would encounter a charger with two bays, for two cars – but the charging machine could only charge one car at a time. This was a particular problem with the faster ‘Rapid’ chargers. There were a couple of occasions where we arrived at a charger, and could plug in a cable, but would have to wait because another vehicle was already charging.

Other times, we would get there and all the chargers would have been taken. On the way back from Wales, we visited Chester Zoo, which I’ll blog about later in the summer. There are 26 charging bays available, but on a summer Saturday in August, all were taken by the time we arrived at 10:30am. Thankfully, I could check their availability on an app, and was able to move our car around when one had become free around lunchtime.

There is a degree of etiquette when it comes to charging a car. For example, if your car has finished charging, then, if you can, it’s best to go back to it and move it to a standard space to free it up for someone else to use. Also, don’t hog a rapid charger if there’s a slower charger available that you have the time to use.

So far, we’ve not encountered a charging bay being ‘iced’, as in occupied by a standard petrol or diesel car with an internal combustion engine (ICE).

Only slower chargers available

Many public chargers are 7 kW ‘medium’ speed chargers. A full charge on one of these would take about six hours for our Nissan Leaf, and likely much longer for those with much bigger batteries. These chargers are fine for ‘destination charging’ – for example, at Portmeirion, where we were intending to stay for the whole day anyway. But they’re no good for a quick charge to continue a journey.

This problem will get better in time as more rapid and ‘ultra-rapid’ DC chargers are installed.

CHAdeMO, or the lack thereof

Our Nissan Leaf can charge from three types of plug:

  • Standard 3 pin plugs at around 2 kW for a slow charge
  • Type 2 plugs at around 7 kW for a medium charge
  • CHAdeMO plugs, for a rapid charge of around 40 kW

CHAdeMO is a Japanese standard, and a number of Japanese cars of a similar age to our Nissan Leaf were built with these sockets and sold worldwide. But it’s not the European standard for fast charging, which is CCS2. CCS2 looks similar to the type 2 socket, but with an extra bit on, and it’s DC rather than AC. We can’t use CCS2 chargers without buying a converter, and they’re expensive – at least £600.

A lot of rapid chargers will just have one or two CHAdeMO plugs. A good example was Northampton services on the M1, where a bank of 12 rapid CCS2 chargers have been installed, but only one CHAdeMO charger. Which, predictably, was already occupied by another Nissan Leaf. Thankfully, we managed to find somewhere else to charge.

I get the point that barely any new electric vehicles are being built with CHAdeMO connectors, but for those of us with such cars, it can be a pain when they’re not available.

All the apps

Public car charging apps are a bit like car parking apps, in that you may well end up with several of them installed. Early on, many public chargers could only be used using an app – I remember talking to someone who was a very early electric vehicle adopter, who said that having all the apps was the worst thing about it. Thankfully, many public chargers offer contactless payments with a credit card, which is much easier. And some accept an RFID card, which you can order from several places that you then link to a payment method. We’ve got one from Octopus Energy, which works most of the time, but not always.

But some still require you to download an app, sign up for an account, link a payment method and then start charging. The worst of these, in my view, is Pod Point, where you also have to top-up a balance before you charge. That means estimating how much you’re going to need to pay before charging, and then having any money left over held in a Pod Point account. Unfortunately, Pod Point are one of the bigger operators, having partnered with Tesco.

The other issue with apps is phone reception. We managed in Wales, but had we not had a signal, there would have been some places where we wouldn’t have been able to use the chargers.

No chargers where you need them

I mentioned ‘destination charging’ above, giving good examples of Portmeirion and Chester Zoo that allow visitors to charge whilst they’re there. This is one of the key advantages of having an electric car, in that you can charge at somewhere you were planning to stop at anyway, rather than taking a detour to a petrol station.

But not all ‘destinations’ have charging. Whilst in the Midlands, we visited Cadbury World, which doesn’t yet allow its visitors to charge their cars. Which was a shame, although we did find a rapid public charger at an art-deco McDonald’s in King’s Norton.

Thankfully, it looks like more places are investing in charging infrastructure for their visitors. The National Trust, where possible, is installing chargers at many of its properties. And they’re potentially another income source for these attractions. Whilst some may offer free charging, as an incentive, most electric car drivers do expect to pay to charge. So whilst there is the upfront cost of installing electric car charging infrastructure, and then maintaining it, in the long run it could make a good return on investment.

Broken infrastructre

At home, our nearest rapid charger is a short walk away. But it’s been out of order for months, and we’ve seen a number of public chargers that were broken on our travels. This particular charger is in a local authority car park, and I understand that the council got funding to install it, but not maintain it. And last weekend, when we needed to use a rapid charger in Congleton in Cheshire, all of them across the whole town were faulty.

I wouldn’t say faulty chargers are a widespread problem, and most mapping tools for finding public chargers will indicate whether chargers are faulty if they have this data. That should reduce the risk of arriving at a charger with only a few watt-hours to spare, to find it’s out of order.

Charging at home is (almost) always cheaper

Electric cars make the most sense when you can charge them at home. Your home electric supply will (almost) always be cheaper than using a public charger. We’re on a fixed electricity tariff with Octopus, where we pay 20p per kWh. And that assumes that we’re charging overnight, without any contribution from our solar panels.

By contrast, even the cheapest public chargers are usually more than double that. Rapid chargers, especially those at motorway service stations, cost even more – typically 88p per kWh, so more than four times more expensive than charging at home. Part of the reason for this is that public chargers must charge you a higher rate of VAT. At home, your electicity bill has VAT at 5%, but public chargers have to charge 20% VAT.

If you need to use a public charger to top up your charge to get home, then it’s worth calculating how much you need to charge to get home. That way, you only need to charge your car by that much (plus maybe a bit extra) to get home, where the rest of the charge can be done more cheaply.

I say ‘almost’ always cheaper because you may get lucky, and find a free public charger. There aren’t many, but we came across two in Wales. Admittedly, one was a 3-pin plug, offering a very slow charge, and the other was a medium speed 7 kW charger. But still, it’s free electricity, and as we were away and reliant on public chargers, it was very welcome.