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Discussion Starter #1
Hoping to get a Leaf 40 soon.
Not sure how long it takes to get a charger fitted so planning on using the Granny as a stop gap.

Minimum time we have to charge is 12 hours and it's usually a lot longer overnight.

Anyone see any issues with this ?

We may also need to use an extension reel until we can get a socket installed nearer to the end of the garage anyway.

Do we need to get a special extension reel ? Might come in handy I guess ?

Thanks.
 

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It depends how many kWh you use each day. The granny will achieve around 2kW additional charge in the battery, so 12 hours in approx 24kWh. If say you thrash the car at the Motorway speed limits you'll use at least 0.33 kWh/mile so that represents about 75 miles range. What is your usage pattern?
Officially extension leads shouldn't be used with granny leads. If you must use one make sure that it has a high enough capacity, use it fully unreeled, and make sure that the plug doesn't overheat. Check it every 10 minutes on the first uses.
Beware also that the brick of the granny isn't waterproof - keep it out of puddles. The socket of your extension needs to be protected to ensure that remains waterproof. Check out Electric vehicle leads
 

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Once more... Nissan do not recommend using extension leads. They are not safe
The granny lead should have a heat sensor in the plug and switch off if they become hot due to poor connections. An extension lead introduces another plug and this will not have the same sensor to switch off if it gets hot.

Coiled extension leads - reels are liable to be left unwound and can get very hot, melt and fail dramatically.

Some places simply cannot enable a charge without an extension and then I use a 10m heavy duty cable without a reel and ensure that both plugs remain cool while charging and all cables are unwound and able to stay cool.

Tough leads do these leads

Or


No one should consider using an extension reel.

It is then for you to decide what to do, using a proper extension lead is less safe than not using one, but the risks are low and can be reduced with knowledge.
 

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Discussion Starter #5
Thanks for all the info. I think it's usually under 50 miles a day so well within the granny cable capacity.

Will order a tough extension cable and check it when using. It's only a short term plan.
 

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Granny? Not an issue if used on a good quality socket with good wiring. I've been over 5 years on a granny.

Extension lead? Not recommended but the electricity doesn't know what it's passing through. Again, good quality, heavy duty and the best IP protection you can find.
The granny takes 10 amp but get a 13 amp continuous rating lead if you are going that route. But a properly installed outdoor socket (preferably on its own dedicated spur) is best.
 

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The issue with extension leads is that the EVSE (granny lead) checks the temperature in the plug to make sure it's not overheating. Because you have the extension it could be overheating at the wall socket end and the EVSE wouldn't know.

If you do it then make sure the wall socket is in good condition and you get a really decent extension lead, and maybe a fire alarm near it.
 

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Discussion Starter #12
Thanks everyone. Picked up the car today and charging now. Is it about 5 miles an hour gets added with a Granny ?

Have checked the cable after a bit and it's fine.
 
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