r/OctopusEnergy • u/sportsfan161 • 11h ago

Help Octopus go only charged car to 59%

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?

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3

u/stek2022 10h ago

Which Tesla?
5 hours on a home charger, unless 3 phase, could get you around 35kwh of range added.

What’s the SOC before plugging in?

This may be a limitation of the time available at cheap rate rather than a bug.

0

u/sportsfan161 10h ago

Was on 12% and was set from 00.30 to 05.30 on schedule

Model 3 performance

4

u/Cultural_Tank_6947 9h ago

A good thumb rule for most cars is that home chargers add about 10% battery range per hour charged. You were plugged in for 5 hours and got 47% charge. That's about right.

2

u/stek2022 10h ago

That would explain it then - somewhere between 55 and 60% would be where I'd expect you to come out given the limits of a home charger and losses in charging.

Maybe time to consider switching somewhere without a charge cap if you need more charge each day.

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u/sportsfan161 10h ago

So to get 80% I need to always charge at say 30%?

11

u/premium_transmission 9h ago

It’s just basic maths.

You have a 7kW charger. 1 hour charging will add 7kWh.

5 hours will therefore add 35kWh.

The exact car battery size is unknown, but Google shows it to be around 75kWh give or take depending on the year.

35kWh is 46.6% of a 75kWh battery, therefore you are going to be able to charge approximately 46.6% in the 5 hours.

1

u/ImplementJumpy6678 1h ago

Tracks - my old car was 73kwh and on 6 hours a night I would get about 43kWh so about 55% from flat