Intelligent Octopus Go limiting cheap charging.

QrizB

born_again said:

Given I have a OHME Home Pro, you only have 2 options for departure time. 11:00 & 04:00. Any other time selected & it tells you to select either of the times.

Really?

My Ohme app (for my ePod, on IOG) will let me pick any time I want between 0400 and 1100.

I have a daily schedule set that has a "ready by" time of 0730.

Edit to add screenshot:

pensionpawn

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

QrizB

pensionpawn said:

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

No tariff limit, AFAIK.

However unless you're going to get clever with both the car and the charger, you'll be limited to charging at ~7kW (32A at whatever voltage you happen to have) so six hours will only give you 42kWh of charge.

11kW and 22kW chargers exist, and some cars are able to use them, but that needs three phase power.

_Sam_

I too am interested in how it will work with solar. In Zappi the eco+ (most useful mode for solar) allows grid charging for short periods of time (1min or 30sec if I remember correctly) to account for odd clouds to reduce stop/start of the charging.

How will Octopus track these tiny charging sessions - will they tick off the entire half-hour slot only because the car pulled from the grid for 3min during that half-hour?

pensionpawn

QrizB said:

pensionpawn said:

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

No tariff limit, AFAIK.

However unless you're going to get clever with both the car and the charger, you'll be limited to charging at ~7kW (32A at whatever voltage you happen to have) so six hours will only give you 42kWh of charge.

11kW and 22kW chargers exist, and some cars are able to use them, but that needs three phase power.

I know that I have a 100A fuse to the house and that my electric shower can draw 10kWs without any issues, so I'm not sure why charging an EV at around 12 kWs should require an upgrade to 3 phase? I have seen my house occasionally demand similar when there's a combinational demand from oven, hob, under floor heating etc..

QrizB

pensionpawn said:

QrizB said:

pensionpawn said:

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

No tariff limit, AFAIK.

However unless you're going to get clever with both the car and the charger, you'll be limited to charging at ~7kW (32A at whatever voltage you happen to have) so six hours will only give you 42kWh of charge.

11kW and 22kW chargers exist, and some cars are able to use them, but that needs three phase power.

I know that I have a 100A fuse to the house and that my electric shower can draw 10kWs without any issues, so I'm not sure why charging an EV at around 12 kWs should require an upgrade to 3 phase?

When AC charging, the wallbox just manages the supply to the vehicle. The battery charger (the bit that does AC to DC conversion) is built into the vehicle.

Most cars only have 7kW built-in chargers (32A single-phase). Some manufacturers offer larger chargers on some models, either 11kW (16A 3-phase) or 22kW (32A 3-phase).

I've not seen a light vehicle with a single-phase charger above 32A.

Edit to add: EV geeks if I've got this wrong and there is a higher-power single-phase option, please let me know!

pensionpawn

QrizB said:

pensionpawn said:

QrizB said:

pensionpawn said:

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

No tariff limit, AFAIK.

However unless you're going to get clever with both the car and the charger, you'll be limited to charging at ~7kW (32A at whatever voltage you happen to have) so six hours will only give you 42kWh of charge.

11kW and 22kW chargers exist, and some cars are able to use them, but that needs three phase power.

I know that I have a 100A fuse to the house and that my electric shower can draw 10kWs without any issues, so I'm not sure why charging an EV at around 12 kWs should require an upgrade to 3 phase?

When AC charging, the wallbox just manages the supply to the vehicle. The battery charger (the bit that does AC to DC conversion) is built into the vehicle.

Most cars only have 7kW built-in chargers (32A single-phase). Some manufacturers offer larger chargers on some models, either 11kW (16A 3-phase) or 22kW (32A 3-phase).

I've not seen a light vehicle with a single-phase charger above 32A.

Edit to add: EV geeks if I've got this wrong and there is a higher-power single-phase option, please let me know!

DC fast charging. Not available yet (hopefully next year, hence my original post timeline and query about tariff kWhr caps)
https://wallbox.com/en_uk/ev-charging-101
https://futurechargingsolutions.co.uk/bidirectional-storage/#:~:text=The Wallbox Quasar 2 is a bi-directional,mm x 338 mm x 127 mm

born_again

pensionpawn said:

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

Well the good news is unless you are doing long runs everyday. You do not need to charge every day.
So you can just add a % as & when required.

So given IOG new limits you would get 42kW in the 6 hours (subject to some loss)

pensionpawn

born_again said:

pensionpawn said:

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

Well the good news is unless you are doing long runs everyday. You do not need to charge every day.
So you can just add a % as & when required.

So given IOG new limits you would get 42kW in the 6 hours (subject to some loss)

Well, hopefully 72 kWhrs as the Wallbox Quaser 2 charger is capable of 12 kWs..

Tree_pipe99

born_again said:

pensionpawn said:

I am considering acquiring my first EV next year, which would have an 84 kWhr battery. Having not investigated EV / overnight tariffs in detail, is there a tariff limit (I appreciate that there are electrical considerations) to the amount of kWhrs that can be imported over the 6 hour cheaper period?

Well the good news is unless you are doing long runs everyday. You do not need to charge every day.
So you can just add a % as & when required.

So given IOG new limits you would get 42kW in the 6 hours (subject to some loss)

The 42kW assumes your charger gives you the full 7kWh for the whole 6 hours. Some will give a lower speed at times, depending on conditions.