Tomato Energy Experience

Mywatts is now showing my usage.

It does however, only show up to midday yesterday. I checked yesterday and it only shown up to midday again for the previous day. I expect it is only updating once a day.

Is that what you are also seeing?
 
It varies. Today, mine is showing usage upto 06:00. Yesterday, it was showing upto 12:00, until it updated overnight.
 
Hi John my zappi is fitted and nice bit of kit too got the timer set to switch on 1 a.m. And off 6 a.m.
full extent of my window now it occurred to me that the zappi is just a high price switch on and switch off now I have just connected a solid state 100 amp hour battery charger that runs my solar energy for the house and if I could locate a socket to match the zappi plug I could plug the zappi cable straight in and instead of charging the car it could charge my solar battery bank have you heard of anyone doing this because it's not rocket science it should work nicely what do you think
 
robbymax said:
Hi John my zappi is fitted and nice bit of kit too got the timer set to switch on 1 a.m. And off 6 a.m.
full extent of my window now it occurred to me that the zappi is just a high price switch on and switch off now I have just connected a solid state 100 amp hour battery charger that runs my solar energy for the house and if I could locate a socket to match the zappi plug I could plug the zappi cable straight in and instead of charging the car it could charge my solar battery bank have you heard of anyone doing this because it's not rocket science it should work nicely what do you think
Click to expand...
You have to create the pilot signal from the other end of the Zappi and remember, the Zappi only switches on / off the 240v to its output, you need some intelligence at the other end to charge batteries appropriately. That said it can (and has) been done, you use an Arduino with some simple programming to generate the 1KHz PWM Pilot signal needed.

J
 
mystreet said:
Mywatts is now showing my usage.

It does however, only show up to midday yesterday. I checked yesterday and it only shown up to midday again for the previous day. I expect it is only updating once a day.

Is that what you are also seeing?
Click to expand...
It is now showing usage up to 14:30. :)
 
mystreet said:
Mine is still stuck at midday on the 12th ?
Click to expand...
Mine is definitely still working, almost live data in fact.

There is a problem though in the MyWatts data, timing and charges are wrong. It;'s incorrectly logged me starting all of my battery charging, cars etc at 23:30 when it definitely doesnt start until 00:01. It also has incorrect pricing on the data recorded:-

tar1309.PNG

This is my tariff, you can see clearly off peak is from 00:00 to 06:00

cap1309a.PNG

You can see here at 05:00 to 05:30 0.817 kWh was used. This is still in the off peak 5p kWh time.

cap1309.PNG

The same slot on the cost screen shows 18.0168108p charge which equates to the peak tariff price.

Digging deeper into the data on a spreadsheet:-

analysis.PNG

The data is skewed by an hour. Tomato are using Coodinated Universal Time which is currently 1 hour behind our current time. So for BST the off peak is from 23:00 to 05:00.

All change ! LOL.
 
johnb80 said:
Mine is definitely still working, almost live data in fact.

There is a problem though in the MyWatts data, timing and charges are wrong. It;'s incorrectly logged me starting all of my battery charging, cars etc at 23:30 when it definitely doesnt start until 00:01. It also has incorrect pricing on the data recorded:-

View attachment 30251
This is my tariff, you can see clearly off peak is from 00:00 to 06:00

View attachment 30250
You can see here at 05:00 to 05:30 0.817 kWh was used. This is still in the off peak 5p kWh time.

View attachment 30249
The same slot on the cost screen shows 18.0168108p charge which equates to the peak tariff price.

Digging deeper into the data on a spreadsheet:-

View attachment 30255
The data is skewed by an hour. Tomato are using Coodinated Universal Time which is currently 1 hour behind our current time. So for BST the off peak is from 23:00 to 05:00.

All change ! LOL.
Click to expand...
I've checked mine and it's 00:00 to 06:00 off peak.
 
@johnb80
Thanks for the info on Tomato... likely to swap (from eOn Next) today... any way to get you a recommender bonus, or is there a discount code (anyone)?

Have a DIY system at home, so no export available, no gas (use oil), and now made 2 months disconnected from grid, so the nearly 10p drop in standing charge is significant, as well as 2p cheaper night rate...
 
andyMG4 said:
@johnb80
Thanks for the info on Tomato... likely to swap (from eOn Next) today... any way to get you a recommender bonus, or is there a discount code (anyone)?

Have a DIY system at home, so no export available, no gas (use oil), and now made 2 months disconnected from grid, so the nearly 10p drop in standing charge is significant, as well as 2p cheaper night rate...
Click to expand...
Go for it!

Just watch out for the timings of the off peak, I'm still getting caught out a little.
 
Gadget Geek said:
I've checked mine and it's 00:00 to 06:00 off peak.
Click to expand...
I changed mine around yesterday to try and match the charger timings to Tomato and still it was wrong. Charging was set to commence at 23:00 BST. and this is what happened:-

1726307513177.png


I'd gone the wrong way with the one hour difference. I've now set my charging on both inverters and the cars to start at midnight.

Watch this space :ROFLMAO: :ROFLMAO: :ROFLMAO:
 
johnb80 said:
it is a very cheap tariff if you have batteries etc,
Click to expand...
I have 14kWh as 2 ex-VW ID3 modules... now supplemented by 51kWh of MG4 SE SR. I can take 5kW from the MG4 via a 50V/100A charger to top up the house batteries when weather requires. Suspect I will need grid electricity (@5p/kWh) to top up from later this month.

As you say, seems by far the cheapest tariff right now...
 
johnb80 said:
You have to create the pilot signal from the other end of the Zappi and remember, the Zappi only switches on / off the 240v to its output, you need some intelligence at the other end to charge batteries appropriately. That said it can (and has) been done, you use an Arduino with some simple programming to generate the 1KHz PWM Pilot signal needed.
Click to expand...
Hi John, thanks for the reply. The battery charger I have got is intelligent, programmable, so as the batteries fill it shuts down to nothing so it will not overcharge. Do I still need an Arduino?
 
robbymax said:
Hi John, thanks for the reply. The battery charger I have got is intelligent, programmable, so as the batteries fill it shuts down to nothing so it will not overcharge. Do I still need an Arduino?
Click to expand...
For the wallbox to switch on the output the handshake has to be done by the car (or other device).

Heres the sort of infor you need to make up the pilot signal and spoof it into working. The Pilot signal will come from the wallbox, you have to apply resistors to clamp voltages to make things happen.

The Wallbox will be giving out a 1000Hz signal +/- 12v in a square wave. The duty ratio is the wallbox telling the charger how much current it can take.

Pilot PWM.PNG

So in the case of a 7kW charger it would be 50% for it to charge at 30 amps.

The car can apply resistors or active components to limit the voltages for different stages eg

pilot state.PNG

If you clamp the high at 9v max with the low still going to -12 the wallbox knows something is connected but not charging. The output from the wallbox will be switched on at this stage.

The pilot High is clamped further down to 6v the wallbox then knows the device is charging.

I personally would use an Arduino to make this work, programming is easy and the arduinos are cheap. I would use transistors to clamp the pilot signal to the two voltage levels you need, switching them directly with the arduino outputs. The hardware should be less than £20 to make this work.
 
johnb80 said:
For the wallbox to switch on the output the handshake has to be done by the car (or other device).

Heres the sort of infor you need to make up the pilot signal and spoof it into working. The Pilot signal will come from the wallbox, you have to apply resistors to clamp voltages to make things happen.

The Wallbox will be giving out a 1000Hz signal +/- 12v in a square wave. The duty ratio is the wallbox telling the charger how much current it can take.

View attachment 30348
So in the case of a 7kW charger it would be 50% for it to charge at 30 amps.

The car can apply resistors or active components to limit the voltages for different stages eg

View attachment 30349
If you clamp the high at 9v max with the low still going to -12 the wallbox knows something is connected but not charging. The output from the wallbox will be switched on at this stage.

The pilot High is clamped further down to 6v the wallbox then knows the device is charging.

I personally would use an Arduino to make this work, programming is easy and the arduinos are cheap. I would use transistors to clamp the pilot signal to the two voltage levels you need, switching them directly with the arduino outputs. The hardware should be less than £20 to make this work.
Click to expand...
Thank you John you just made me realise how much I do not understand electronics and I will go back to my original plan and leaves the zappy alone
 
I have only just read this thread, as I (stupidly) thought it was about some wacky process of getting energy from salad ingredients…….
I too have now signed up, as the tariffs are indeed generally lower than Octopus. The peak rate is slightly higher, but not sufficiently so to worry about.
 
Support us by becoming a Premium Member

Latest MG EVs video

MG Hybrid+ EVs OVER-REVVING & more owner feedback
Published
Subscribe to our YouTube channel
Back
Top Bottom