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Charging between two times

shuhockey

Member
Dec 2, 2019
65
44
UK
I've a model 3, and for the last 6 months we have charged the car using a 3 pin plug and it has been fine. After 4 attempts we have finally got a smart meter fitted so will be moving from bulb to octopus asap. So how do I charge the car every night but only at the off peak times (mid night to 4.30am?) using just the 3 pin plug? I've the ev.energy app but that only allows schedule finish like the Tesla. Free options are preferred.
 

Mr H

Active Member
Jan 6, 2020
1,446
1,443
Manchester
Plug in and start a charge - set a charge limit that will take 4 hours - Stop the charge - Go to the charging schedule on the charging screen and set the start time as 12.30am as that's the time the Octopus go window starts.

You're only likely to get around 35 miles added on the 3 pin at 2kw
 

Medved_77

TM3 SR+ | MSM+Black | No FSD
Jan 20, 2020
1,916
1,875
Scotland
I've a model 3, and for the last 6 months we have charged the car using a 3 pin plug and it has been fine. After 4 attempts we have finally got a smart meter fitted so will be moving from bulb to octopus asap. So how do I charge the car every night but only at the off peak times (mid night to 4.30am?) using just the 3 pin plug? I've the ev.energy app but that only allows schedule finish like the Tesla. Free options are preferred.
The ev.energy app should do just what you're looking for, charge at the cheapest times that the tariff provides. You can set a maximum per kW/h price within the app so it doesn't exceed charging at off peak rates although beware you may not always get to your desired charge level.

If you haven't yet signed up to Octopus I'd be happy to send you over a referral code for £50 off your bill.
 

rotor2k

Member
Sep 16, 2019
477
251
London
In ev.energy you can tell it to only charge at off-peak rates, which for Octopus Go will be from 00:30 to 4:30. ev.energy uses your Tesla credentials to instruct he car to start and stop the charge at the (roughly) right times. If you switch to Octopus Agile you can then tell ev.energy to only charge if the rate is below x pennies per kWh (so you might get more than 4h per night, or you might get less!). As pointed out above, you aren't going to get a tremendous amount of range from the granny charger in 4h!
 

nxsynjs

Member
Jul 5, 2020
193
143
UK
If you have Teslafi or some other app that allows scheduling, set your start time in the car and using the app schedule a stop charging instruction for when you want it to stop.
 
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Cnixon

Member
Mar 5, 2020
375
110
Basingstoke
The car itself will be able to define the start time. Evenergy defines the end time (ready by). The max price and off peak I have had problems with them working as the car will start the charge if it is plugged in and not yet fully charged or if sentry mode is draining the battery.
 

darkNstormy

Member
May 1, 2020
274
186
North East
The car itself will be able to define the start time. Evenergy defines the end time (ready by). The max price and off peak I have had problems with them working as the car will start the charge if it is plugged in and not yet fully charged or if sentry mode is draining the battery.

Sometimes the ev.energy app has a delay before it stops the charge. You can do this manually from the Tesla app after you've plugged in - there's a button to stop charging.
 

rotor2k

Member
Sep 16, 2019
477
251
London
To stop the car from charging as soon as you plug it in, make sure the car has a scheduled start of, say, 0:30. Ev.energy will override that anyway when it comes to charge the car, but having that scheduled start enabled stops the car from immediately starting to charge whenever you plug it in.
 

VanillaAir_UK

Supporting Member
Jun 17, 2019
7,172
4,687
Surrey, UK
We charge on Go but only at 10A, so numbers will be different at different charge rates.

On car, we set a scheduled start time for 12:30. Prior to charging, I then do a mental calculation and manually set to charge limit to 11% above what the current SoC is present. Car will then charge automatically approximately within the Go window.

I do have a backup on TeslaFi, a start charge action set at 12:35 and a stop charge notification at iirc 04:45. These have never been needed and tbh, I'll probably remove them at some point.

My personal view of charging is that I charge because I need the charge (even if this is a few days hence as is sometimes the case at 10A), so if I don't fill the 4 hour slot, or I overrun slightly (very rare and normally just a few minutes), its no big deal. I'm not out to squeeze every last kW out of the cheap rate window. Same attitude if I am charging off of solar.
 

Dilly

Active Member
Feb 24, 2020
1,458
1,082
Norfolk
I don’t want to hijack this thread but just nudge it a little further.
With solar fading as we head into winter, I’ll be setting timed boosts in my Zappi to coincide with cheap rate. That’s simple for me and ends at 04:30am.
I also want to pre-heat for a departure at 07:00am a couple of days each week. If the car is fully charged at 04:30 will it still be able to preheat from the car’s own later timer?
The Zappi has a precondition mode that may allow it
Does anyone do similar?
 

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