You get a 3 pin to car (type 2) and a type 2 to type 2 cable, both with delivery of the car. I don't know the lengths off hand, but I would estimate around 5m (the polestar website might show details in the options in the configurator, it certainly says "comes with vehicle" on some of them if I remember correctly.

I have bought the toughleads extension you reference. Not used it yet, but it certainly looks the business, thick cable and plugs so hopefully up to 10 to 13 amps for charging.

 

I bought this and it works well: 25m single socket heavy duty 13amp (2.5mm cable) extension lead

 

Just remember that the granny charger supplied with the car has a temperature measuring sensor embedded in the mains plug, so it can detect if things overheat. If you use an extension lead, you lose that and so ultimately risk a fire at the wall. The lead supplied with the car is about 6m, if I remember correctly.

With a previous car, I had a decent quality 20m extension lead and I charged the car overnight at 8A. By the morning, the granny charger plug had welded itself to the extension lead socket!

 

Thank you for the advice.
The company I linked above will supply the cable with either an in-line RCD or one built into the plug - I'm not sure if this would trigger if there was a temperature overload.

Just wondering if the better option is to use the 6 m cable plugged into the three pin socket and then extend at the other end, however I'm assuming that that will end up with a small drop in supply getting through to the car.
Just trying to figure out the best option of what to buy to do the job.

 

I have exactly the cable you listed. I used to use it to connect to another external socket because it saw ever so slightly too far away and the socket cover didn't accept the bulky plug on my charger.

It worked perfectly, though I only used a 2m one, the socket inside the weatherproof section is a proper, heat resistant socket. The RCD protector wired inline is a nice safety point. Never found it getting hot.

I now use it to connect my pressure washer after having a 13a socket fitted into the garage near the front so I can snake the charger cable under to door.

 

@Jetski Jezz

I'm assuming that that will end up with a small drop in supply getting through to the car.

I suppose the car measures the supply at the car, so if anything there will be a small increase at the house side

 

The ideal option is to use the supplied one, even if it means parking awkwardly. The safest option is to buy an aftermarket granny charger with a sufficiently long cable, but obviously that'll be expensive. I actually think you'd be safer using a Type 2 extension cable than a mains cable, because Type 2 connectors are rated to 32A, so plenty to spare, whereas the mains is getting close to its rating and so on. So in your position, I'd be buying a Type 2 extension cable...

... and then I went and looked online and one place said they don't recommend them with EVSEs (granny chargers) - no idea why! Despite that, I'd still be buying the shortest Type 2 extension cable I could sensibly get away with. Mains extension leads are simply not intended to take high current for long periods, neither are mains plugs and sockets, whereas Type 2 connectors are.

If you do decide to go with an extension lead, those Tough Leads look excellent and far superior to the standard ones on sale. Their article about why they've developed these leads is surprisingly well-informed and useful:

Safely Charging your Electric Vehicle Using a Granny Charger

The definitive beginners guide to safely charging your electric vehicle including types of connectors, granny chargers, extension leads, timers for off peak tariffs, meters to log energy used and adaptors to enable charging abroad. Also covers using a European or Scandinavian granny charger in...

toughleads.co.uk

 

I charge at the full 10 amps, using the granny charger plugged into a mechanical time switch. I have had no issues, not the slightest bit of warming on the plug, socket or time switch after a 7 hour charge period.