Tesla power wall

[Jimmy90]

There’s the brains for it called the Gateway that has to be close to the electricity meter. It’s about 40cm x 60cm x 12cm.
It looks quite smart so is ok in the house.

How are you getting on with the batteries now? Do you mind sharing the company that installed them now that you have them in? Cheers Jimmy

 

[Scrambler]

How are you getting on with the batteries now? Do you mind sharing the company that installed them now that you have them in? Cheers Jimmy

Powerpac https://www.powerp.co.uk/
They are a very reliable family firm. They also fitted the pv panels on our barn roof around 11 years ago (25kW 3 phase)
We have one 3 phase smart meter that feeds the house and farm.
Unless the grain dryer is running, our electricity is split between the house, farm workshop and car charging.
Since the batteries were installed about 6 weeks ago, we have only imported a very small amount of electricity - it can sometimes take a moment to react to a small increase in load so it imports 0.1kw for a few seconds.
I couldn’t find any installers who were fully clued up on how the combination of 3 phase supply and solar and a mix of single and 3 phase usage would work with batteries on 2 phases. I did a lot of research and phoning around, but no one seemed to know how it would work. Usually they would claim they knew, but in reality they didn’t.
Maybe I am now the UK authority on the subject!
A key to allowing it all to work well is having a smart meter that does net metering across the phases.
Tesla Powerwalls can hold 13.5kWh and continuously import or export at 5kW each. So I’m my case, store 27kWh and import/export at 10kW.
The clever bit, and what seems to be not well understood, is how the Tesla Gateway manages all 3 phases even if the batteries are only connected to 1 or 2 phases.
For example, if our solar panels are producing an excess of 3kW per phase, you would think that each battery would be charging at 3kW and 3kW would be going to the grid, but the Gateway knows that there is 3kW being exported so imports 1.5kW on the other 2 phases so that the batteries are charging at 4.5kW and the meter registers net zero.
The same thing happens if you are using power on the phase that isn’t connected to a battery. The Gateway will export from the batteries to the grid whatever is needed to meter net zero.
We had a 3 phase Zappi car charger installed at the same time which is a massive help in making maximum use of the solar pv.
The whole setup works exceptionally well.

 

[cocacolafloat]

Read here that there's a two-year waitlist for a tesla powerwall.

Home - Cardinal Electrical

smartenergy.co

Do you think it's better to wait for a powerwall or just choose a different battery? Powerwalls do have great reviews.

 

[Scrambler]

Read here that there's a two-year waitlist for a tesla powerwall.

Home - Cardinal Electrical

smartenergy.co

Do you think it's better to wait for a powerwall or just choose a different battery? Powerwalls do have great reviews.

A BYD Battery Box combined with a Fronius inverter is a good option. It can work well with 3 phase or single phase and uses LFP (lithium iron phosphate) battery tech which I’m led to believe has advantages over what Tesla use in their batteries.
The Powerwalls were better value for money though. Fewer £/kWh. The BYD Fronius set up seems to be better value if purchased in the EU though.