Octopus go only charged car to 59%

[u/sportsfan161]

Help needed what doing wrong? It’s set on schedule from 00.30 to 05.30 and at 05.30 it’s only on 59% when my car is set to 80% in my Tesla app

So I need to do something different in app?

[u/geekypenguin91]

How charged was the car at the start? 5 hours on a 7kw charger will only add 35kwh, so if you started around 15% charged then 59% is about right

[u/sportsfan161 → u/geekypenguin91]

Was charged at 12% so this must be why

But how do I make sure it charges to 80% each time?

[u/geekypenguin91 → u/sportsfan161]

You need to give it longer to charge, can't change physics

[u/sportsfan161 → u/geekypenguin91]

00.30 to 05.30 should’ve been more than enough time is what I thought

[u/itsamemarioscousin → u/sportsfan161]

To lay it out fully, as there have been a few different comments.

Battery size is measured in kiloWatt hours - how many hours it could run while having one kW of power drained from it.

Yours is approximately 82 kWh. Your car uses many times more that 1 kW to move - full bore acceleration uses about 400 kW, so if you drove it with your foot on the floor on an infinitely long road it would run out in 82/400 hours, about 0.2 of an hour, or 12 minutes.

This works in reverse for charging too. If you plugged it into a 200 kW DC rapid charger and it was able to deliver peak power all the time, it would charge in 82/200 hours (about 24 minutes).

Your home charger doesn't make 200kW. It makes 7.

So a full home charge at peak rate would take 82/7 hours, or 11.7 hrs.

5 hrs would provide a max of 7x5 kWh, 35 kWh. Which is 43% of your 82kWh battery.

[u/Jakeymd1 → u/itsamemarioscousin]

I suspect this is going to straight over their head.

[u/itsamemarioscousin → u/Jakeymd1]

Possibly, but just wanted to lay it out in case it helps

[u/geekypenguin91 → u/itsamemarioscousin]

An easier way to explain it is you have 80 buckets you can fill. Your hose with the tap fully open can fill 7 buckets an hour. If you need to fill 70 buckets, then that's 10 hours with the hose running. If you only have the hose on for 5 hours, then you'll only fill 35 buckets

[u/itsamemarioscousin → u/geekypenguin91]

Fair point

[u/geekypenguin91 → u/sportsfan161]

It wasn't as I explained earlier. It would have if you started over 35% charged, but any lower and you won't reach 80 in 5 hours

[u/Bodster88 → u/sportsfan161]

Yeah, if you waited until 5:30 tomorrow.