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**ElectroGallon**, or

**ELG**for short.

This unit equals

**10 kWh**, or

**10 domestic Units**.

Here's why. For a few years I've been driving an Ampera, useable battery

**10.4**kWh. In general I've got around

**40-45**miles out of this. I did an extreme test once, cross-country at dawn, max speed

**40**mph, cresting hills at walking pace & coasting down to build up speed for next hill, pulling over into field entrances to let the occasional tractor race past me. I managed the magic

**60**miles on a full charge!

That works out at

**57 M/ELG**. Any petrol car getting

**57 M/Gall**is doing well.

When getting

**45**miles out of Ampy, that's

**43 M/ELG**. Again, ok for a heavy petrol car (~1800 Kg)

When describing this stuff to ICE owners, it's very hard to get across the concept of what

**10.4 kWh**means. They can grasp the idea that it costs appx £1.50-£2 when I tell them the cost, but it's not an easy concept to adopt. Think about it; 1 kWh is good for 3-5 miles, so is a very small amount in petrol equivalent terms. Our brains are used to working in whole units, not digits with more digits (still importamt & meaningful) after the decimal place. And how many more after the decimal place do we need? Again, decimal fractions aren't an easy concept.

What I found

*did*work well was describing the electric capability of my EV by saying "Think of it as a cheap or even free gallon of petrol in your tank every morning". And that's actually a very good way to think of these Phevs, most are around this mark.

I'm now testing & comparing my Ioniq

**38.4**kWh & ID.3

**58**kWh EVs. To those techhies here, these numbers all make sense, and are needed to understand what I'm talking about. But Joe Petrol Public has no idea what's going on! Numbers in the region of

**38**,

**45**,

**58**,

**70**, that we toss around are actually rather on the large size for the typical human brain. Comparing these 2 EVs, I'm coming up with figures like

**3.95**miles/kWh,

**4.3**, etc, that sort of region. Again, those wretched digits after the decimal point are cropping up again. Can't we get rid of them, and clarify the EV situation & make life a lot easier for Joe Petrol Public?

Answer is YES, IF we decide to talk about miles per 10 kWh used. Suddenly those

**3.9**,

**4.3**etc become

**39**,

**43**, miles per ElectroGallon,

**M/ELG**. One

**ELG**will take your electric car roughly the same distance that

**One Gallon**will take your petrol car. The cost of

**1 ELG**is around £2.50 at Braintree, £3.90 at Ionity, etc etc. Suddenly these are familiar values, easily remembered as they're is exactly the same sort of range as the well-known & well-understood Gallons & £.

This helps simplify understanding what car battery capacities "mean" to a petrol car owner. My Ampera has a

**1 ELG**tank. So it clearly needs help (petrol) if it's to go any real distance at all.

First model of Ioniq, 28 kWh, was a

**3 ELG**EV.

My Ioniq is a

**4 ELG**EV.

My ID.3 is a

**6 ELG**EV.

Newest Leaf is a

**6 ELG**EV. Etc etc.

Teslas can be

**6, 7.5, 8, 10 ELG**, whatever.

Suddenly the basic difference is obvious to all, and petrol car owners will have an instinctive feel for how far it's likely to go before they need a refill.

My first comparison of Ioniq & ID.s at 70 mph in the wet is this:

**Ioniq 4 ELG car gets 33 M/ELG**

ID.3 6 ELG car gets 30 M/ELG

ID.3 6 ELG car gets 30 M/ELG

Joe Petrol Public will soon get the message that you don't want to let the tank go much below

**1 ELG**left, so the arithmetic of what's useable is now obvious, it's so simple.

I don't need to add that the conversion factor of 10 makes the arithmetic trivially simple. And it gets rid of the need to use decimal points & digits after.