0% VAT on Battery Retrofit installs from 2/2024

Screwdriva

Great news for PV only system owners who are considering storage options at a later time! Credit is due to policy makers for fixing this/ a several other glaring gaps!

superuser19375

This is something i will be looking at in the new year as I have Solar but no battery. 

I can see that the Tesla Powerwall is currently £6k per unit plus £900 for the gateway - these prices include VAT, so assume post February, this will come down to £5k plus £750.

This leaves the question of installation costs, does anyone have a ballpark of what these might be?

Assuming a couple of grand max (i hope) the payback on this system would need to be in excess of £700 a year to be feasible.  

Netexporter

The GivEnergy All-in-One battery and gateway is the same specification as the Powerwall. I've seen quotes of £8000, including VAT, for supply and installation.

superuser19375

Netexporter said:

The GivEnergy All-in-One battery and gateway is the same specification as the Powerwall. I've seen quotes of £8000, including VAT, for supply and installation.

Just checked a local supplier and they are quoting £6850 for typical installs post feb 24 of the GivEnergy and £7250 for the Tesla Powerwall 2.

Now to sell this to my better half and see what deals i can find to fund it

Martyn1981

superuser19375 said:

Netexporter said:

The GivEnergy All-in-One battery and gateway is the same specification as the Powerwall. I've seen quotes of £8000, including VAT, for supply and installation.

Just checked a local supplier and they are quoting £6850 for typical installs post feb 24 of the GivEnergy and £7250 for the Tesla Powerwall 2.

Now to sell this to my better half and see what deals i can find to fund it

May be of interest to you, Tesla has launched (barely) the PWIII, which includes a hybrid inverter allowing direct PV connection. may be worth waiting to see what prices they are offered at. But could be more, and the PWII was available for £5,100 for a month back in Sept.

I want to add a small ground mount PV system, and avoid DNO export issues, so the GivEnergy hybrid system is a better match today. If you have any plans for a PV addition (ground mount, wall mount, garage roof, pergola roof etc etc,) then might be worth considering.

Edit - I mean, considering the hybrid issue, not necessarily Tesla or GivEnergy, just a thought to keep in mind when considering options.

armistice

Just to add that this also applies to battery installs where you don't have solar.

Spies

Still doesn't make financial sense even with vat relief.

Netexporter

Show your workings. Looks a bit of a broad brush statement, to me.

1961Nick

So far this year my 19.2kWh battery plant has saved £1043 with 16 days still to go which should add another £50.

(The above figures are calculated from metered readings & round trip losses of 21.6% have been accounted for.)

When vat is reduced to zero, it should be possible to install 4 x US5000 batteries & an AC inverter for around £5000 which would be a 5 year ROC for me - or around 7 years if you factor in the opportunity cost of interest on £5000 invested.

My original US2000 batteries are now 4 years old (around 1250 cycles) & have a SOH of 95.9% which is pretty impressive.

QrizB

Netexporter said:

Show your workings. Looks a bit of a broad brush statement, to me.

It all depends on your tariff.

With Octopus Flux, for example, an imported kWh is about 10p more expensive than an exported kWh. So your maximum saving on a kWh of generated electricity  that you store rather than export is about 10p.

Conversion losses will eat into this.

Let's thes say that a kWh if battery is about £200. (This is a fairly lowball estimate.) If saving 10p/kWh, you need to cycle that battery 2000 times to cover the cost of the battery alone.

If you generate a large enough surplus of solar PV to fill your batteries for 200 days a year, thats a ten year payback period.

Feel free to compare your own pair of import and export tariffs and see what you get.

Spies

Netexporter said:

Show your workings. Looks a bit of a broad brush statement, to me.

4.8kwh pylontech battery costs £1295, they're rated for 6000 cycles before <80%

That means you have a cost of 21p per cycle, to fill that battery on a cheap tariff, say 9.5p, including losses is 50p, that means each kwh of energy from the battery effectively costs you 14.9p per kwh

You can't just factor in the cost of electric as you can't just use cost of fuel for running costs with a car.