Tesla model 3 , Tesla battery ordered- is this a good idea with existing panels on FIT payments?

cece_3

Hello all.
Help please
I have had solar panels for 6 years it's about 28 pv. I have just got a Tesla company car and I ordered a Tesla powerwall on advice of another colleague that has one with a view to getting one for my self later down the line.

Will I lose my FIT generation & export payments from the government?

I was planning on signing up to the Tesla energy plan with Octopus but they don't do it anymore- what energy deals or provider should I go for please?

I have an economy 7 meter but I am on a standard charge rate at my request as that worked best for me- am I better off switching to economy 7.

I fixed the energy with my current provider and they have insisted I will pay an exit fee even if I remain with them on an ev tariff.

Basically what would you do if you were me please

Krakkkers

What is 28pv? No you will not lose your generation payment.

Qyburn

cece_3 said:

Will I lose my FIT generation & export payments from the government?

FIT is paid on what you generate, the Tesla battery is AC coupled and should be connected on "your" side of the generation meter, so won't affect the readings.

Are you on deemed export, or is it metered? 

cece_3

HI- Thank you so much. I am on a deemed payment for the export . Am I better off ditching my recent fixed tariff with Octopus and moving to an ev tarrif with the battery or does it not matter as I have solar-

Apologies- I have always wanted to be green but struggling with the understanding. Is the Tesla powerwall going to help with my household electricity or just the car ?

Qyburn

cece_3 said:

HI- Thank you so much. I am on a deemed payment for the export . Am I better off ditching my recent fixed tariff with Octopus and moving to an ev tarrif with the battery or does it not matter as I have solar-

You may be better moving to "Outgoing Octopus" for your exports, the Fixed version pays 15p per kWh exported. But thst will be metered export, so depends both on what export rate you get at the moment, and how much you actually use yourself (which will changed with the battery). In your shoes I'd stay for the moment, then monitor your use an exports etc.

cece_3 said:

Apologies- I have always wanted to be green but struggling with the understanding. Is the Tesla powerwall going to help with my household electricity or just the car ?

I doubt the Powerwall will do anything for the car, the capacity is pretty small compared to what it takes to charge up a car. What it will do is store your solar generated electricity so you can use yourself.

Reed_Richards

In a way it's silly.  You have a huge battery available when your car is at home.  Ideally you would charge this at a cheap rate tariff and then use some of its capacity to power your house.  But such Vehicle to Grid (V2G) systems are only at the experimental trial phase, I believe.

NigeWick

cece_3 said:

 Am I better off ditching my recent fixed tariff with Octopus and moving to an ev tarrif with the battery or does it not matter as I have solar-

I have a Tesla M3LR, Powerwall 2 and solar. I went with Octopus Flux. Charge the battery, set the washing machine, tumble drier & dishwasher for 02:00 - 05:00. Export solar during the day and from the PW2 16:00 - 19:00. This means most things are paid for at a minimum but I export at the mid rate and maximum.  Works for me but may not for others.

cece_3

Thanks everyone I am getting there but still unclear on the questions in bold.

For background-The Solar PV panels  have a capacity of 3.75KW
I am on the (now phased out FIT government plan ) the second to the last one before it was canceled. I therefore get generation and export payments. I would like to keep this hence my purchase of the Powerwall and I thought with the AC Connection on my side, the payments would remain obviously I don't want to do anything illegal though. .Is this correct?

The FIT payments are with a different provider to my home energy supplier. I recently (July 23) came off a one year fix and promptly fixed on another regular deal.  have previously had annual returns of roughly £795 and the FIT contract is for 20 years,

I am disappointed to read the Tesla powerwall cannot fully charge a Tesla Model 3- reading through , I thought it was the whole point- if it cannot charge the car properly will it help enough along side with the household bills to offset the approx £9990 cost (I note the warranty is just 10 years)? 


To leave the current octopus Loyal Octopus June 2023 fix,-(annual cost projection is £529.55 a year for electricity £873.52 a year for gas )

I have to pay exit fees of £75 each for the gas and electric.

Can I be green and comfortable with a Tesla Model 3 and solar panels, without the Powerwall? I am 13 miles from my nearest Tesla supercharger
or to Qyburn's point

Am I better off with my Solar Panels, Government FIT payments, no battery and trips to the charging points-0 I do have a destination charger nearer to me?

Ectophile

If you have somewhere to charge a car at home (driveway or garage), you are almost always better off using a home charger, whether or not you have solar panels or a battery.

Domestic electricity is price capped by OFGEM, and attracts 5% VAT.  Commercial chargers are charged at unregulated business electricity rates, and have 20% VAT added on.

1961Nick

There is plenty of opportunity to charge an EV overnight directly from the grid using an off peak tariff. A Powerwall should be viewed as something harvest surplus solar during the day & then use that to run your house overnight. During winter you can charge it overnight off peak & then run the house during the day from it. Only exceptionally would you charge the car from it.

Qyburn

cece_3 said:

I am disappointed to read the Tesla powerwall cannot fully charge a Tesla Model 3- 

The Powerwall has a capacity of 13.5kWh, the Model 3 at least four times that, more if it's one of the long range versions.

 

To leave the current octopus Loyal Octopus June 2023 fix,-(annual cost projection is £529.55 a year for electricity £873.52 a year for gas )

I have to pay exit fees of £75 each for the gas and electric.

You can remain on your existing Octopus tariffs for import (electricity they supply to you) and still sign up for their Outgoing export tariff. And nothing you do is going to require you to change your gas tariff in any case.

My question was whether you're better off on the deemed export and that depends on what that is.  Let's say your deemed export is 50% of generation, and pays 5p. Octopus Outgoing pays 15p, so if you're really exporting 50% then your better off.  But if you were actually only exporting 10% then you be worse.

This will change with the battery, as the whole idea is to store electricity for you to use instead of exporting. That's why suggested monitoring your figures after the installation before making a decision. You're in a good position because you're already getting the FIT and deemed export so don't need to decide right away.

On the other hand if you (or rather your car) are typically home most days when the sun's shining, it may be that charging the car from solar gives you the most benefit and you dont need the Powerwall.

I should have asked, do you have a working Smart Meter, and an export MPAN? 
.