Homeowner Blog

Tesla announce Powerwall 3

Luke Pemberton · 15 Sep 2023

Tesla have now announced Powerwall 3 and we're sure you have many questions, so we made this FAQ to help iron them out. For a full breakdown of everything we know about Powerwall 3, check out our knowledge bank article here: 

Tesla Powerwall 3 - Everything you need to know


Powerwall 3 price, specs, chemistry, release date and more:

The price of the Powerwall 3 has not been announced yet, however, given the calibre of the integrated inverter, along with it being at the start of its product cycle, we’d expect the price to be between £12,000-£18,000 inc. VAT. Compared to the Powerwall 2 which we currently price around £7,250 - £7,750. Sign up to our newsletter to be the first to know.

The main difference is the inclusion of an industry leading hybrid inverter, which will have a few key benefits. The benefits include higher DNO acceptance likelihood, better round-trip efficiency, better shade mitigation, the ability to install more panels on one inverter.

The Powerwall 3 also has a smaller footprint.

There are more benefits, but they either aren't as notable or haven't been announced yet.

The release date of the Powerwall 3 hasn’t been announced yet, all we know is that the US launch should come in 2024, with the UK launch likely coming months later. Sign up to our newsletter to be the first to know.

We don’t know everything yet, however, here’s what we do know:



MPPT Strings


Continuous back up power


Round trip efficiency (solar to grid, 6 solar inputs)



-20C – 50C

 Weather resistance

Flood and dust resistant


Up to 40.5kWh max addition per unit


L 1098.6mm / W 609.6mm / D 193.04mm




10 years


Again, this hasn’t been announced yet, however, speculation would suggest LNMC (Lithium Manganese Cobalt). Given the weight of the whole system being over 40kg lighter than an equivalent system using LFP (Lithium Ferro Phosphate), this is an indication towards LNMC.

It depends on how much electricity you’d use, along with how much capacity you set the Powerwall 3 to have in the event of a power outage.

If you reserve 30% of the Powerwall capacity (4kWh), then you should be able to watch TV, use your laptop and keep the lights and freezer working for almost four hours, whilst enjoying a few cups of coffee in the process.

This is one of the most notable features of the Powerwall 3, and something that had long been desired of the Powerwall 2. The integrated inverter will:

-Improve the DNO acceptance likelihood (for more information on DNO permission, read here), by combining two inverters into one.

-Lead to greater round-trip efficiency, because the two components are intentionally designed with the other in mind, setting Powerwall 3 round trip efficiency at 97.5%

-Inverter has 6 MPPT solar strings, leading to better shade mitigation and more panel orientations available. This number of strings on one inverter is unprecedented in the standard domestic market.

You will likely need DNO permission for Powerwall 3, given its current max output is rated at 11.5kW, which is over the 3.68kW threshold before which DNO permission is not necessary. For more information on this, read here.

However, Tesla have a track record of certifying their batteries and inverters to be able to support lower outputs, meaning that you may be able to downclock this inverter to meet your DNO permission. See Powerwall 2 certification at both 3.68kW and 5kW, unlike competition.

It isn’t clear yet, but if the process is anything like the Powerwall 2, if you are moving house and leaving your Powerwall, you can inform Tesla to handover ownership.

10 years.

It isn’t clear if this is rated for a certain capacity at the end of this period, like the Powerwall 2’s 80%, or for a certain number of cycles like other batteries as of yet.

No, this is not possible according to Tesla.


Topics: Battery storage, Tesla Powerwall, FAQs