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this is possible, there is another 'export-only' control mode under UL1741 PCS. This means that Powerwall will not charge from grid, but can export to grid. Powerwall (more specifically Gateway 2) is not certified for this mode.

The NGOM (or the exception of an NGOM) removes all value from the 'Export Everything' setting. The NGOM is installed for systems >10 kW for exactly this purpose, to prevent battery energy accruing NEM credits. The export credits are capped, at every 15min interval, to the amount of solar...

Using a car analogy - think of the kW rating as the 'horsepower' (power) and the kWh as the distance driven (energy) If your car has 600 HP, you would not expect it to generate that power 100% every minute you drive. Depends on a lot of things - RPMs, temperature, type of gas, etc. The Power...

I think this has been a common question and Powerwall recently received a new feature that addresses this by allowing you to set the % of Powerwall that you want to ensure is kept available for the home. Setting to 100% will mean the car will not charge at all during an outage, except for...

Can you add a rough drawing of the main service panel and how they feed the out building and main house. Sounds like you have a 2x 200A service - with the solar on one side and the house on the other. That could be tricky because the gateway is only rated for 200A so you would not be able to...

You're asking about 'dissipating' energy - how is that different to turning off the inverters? It's in pretty much every technical document that is written about Powerwall and the Tesla.com website. Your installer rushed through training and design - that's not Teslas fault. Combining...

Powerwall installers should demonstrate a backup test for you at the end of commissioning by flipping your main breaker. This includes the power flows in the app - that should work at the time of commissioning. Local API access will be available as soon as the gateway is connected to your...

There are a couple of ways to look at it Will you be angry when your 10kW Solar system overloads the 5kW Powerwall and potentially causes damage? Is 1 broken free powerwall better than 2 working Powerwalls which you only paid for 1?

That does seem high... Even it that is correct - what's the 'ROI' on the asphalt shingle roof? I bet it's more than 23 years...which would make Solar Roof cheaper already

Awesome - I'm sure it's obvious but switching from gas to electric (even if efficient heat pump systems) will for sure increase your electrical usage - so worth noting what will be part of the backup circuit when Tesla provide a design. The whole 'electrify everything' movement is the best way...

What law do you think they are breaking? Just because you want it does not mean Tesla will change the way the product works. If you read Powerwall & The Grid section on this support page - it's pretty clear that in the US, Powerwall will not charge from grid when installed with solar...

Are you part of the Virtual Power Plant?

Yes you could - or just use Time-Based Control Powerwall Time-Based Control | Tesla Support

That, by definition is not self-powered. You are thinking of offset %. There is also no guarantee that just because you sent a green electron to the grid, that a green one will be sent back. Without NEM credits - you would be much more interested in the self-powered score...

Sales guy is partially correct - it's not a Tesla requirement, it's a building code requirement. Speak to your local authority on the actual requirements. If they give indication that it is possible send that information to Tesla

Did you run out of Powerwall energy during the peak period? If yes, then there is an issue stopping at 80%. However - if your peak period is covered, then why put extra energy through the battery and incur efficiency losses? As long as Powerwall has enough energy to cover your predicted peak...

Thanks Ulmo for the explanation - just to be clear you want to use grid energy when the network demand AND the price was low? If you are asking Tesla for 'More Control' - what specifically would you like to see? - Dispatch based on real-time demand (or GHG) signals from your utility -...

Can you explain your graph? My reading is that you turned off your Powerwall while charging between 1pm and 2pm - so actually you reduced the amount of energy Powerwall had to discharge during peak - which is the opposite of what you describe.

Don't forget round trip efficiency - every kwh you charge from the grid, you'll only get 0.9 back - so your off-peak rate effectively becomes 10.8cents - so you are saving 0.5cents per kwh or $24 per year - 2 six-packs is down to 1 !! Also don't forget that that required a full 13.5 kWh of...

Not a great idea - you will never charge from solar - in a region where there is no NEM, you will end up exporting a lot of energy for very little value. In Australia there is not ITC so Powerwall can already charge from the grid. It sounds like you are asking for Time-Based Control - you...

My understanding of it is there are more than 2 sources depending on your TOU schedule, and energy usage. I believe in Australia it is assumed that the export value is very low or zero, in contrast the net-metering in some US areas. Sources - I can think of at least 5 to charge from (more if...

Are you waiting some time before checking the settings have changed? I remember reading that it can take up to an hour for mobile app changes be sent to server and then sync back to the gateway to be reflected in the behaviour.

I think you are getting mixed responses - 'Feed in' usually refers power flow from home -> grid. Ie 'Feed-In Tariff'. That is what cwied was referring to. What you are describing is a maximum total home load (home + PW grid charging), where power flow is grid -> home. It sounds like that...

If they guarantee the amount of energy the total system will produce, do you really care which panel it comes from? My understanding is if their designs indicate potential shading, then solar edge and optimizers will be specced (as they need to meet the guarantee) if you don't have shading, no...

There is no such thing as self-consumption with a stand-alone Powerwall - Powerwall will have solar meters disabled, so there is no 'visibility' to charge or discharge in relation to production - You will only charge from the grid at a set rate and discharge to home load based on peak times

There is no home load (blue) shown for most of the day. This means Powerwall has no visibility to what to discharge to. Most likely the CTs measuring the home load are in the wrong place or configured wrong in the commissioning so the are adding rather than subtracting. Call Tesla support -...

that's a great write up of TBC. My understanding is that the price schedule does not have to represent your exact tariff, but rather if there is economic benefit to load shift. By setting off-peak and shoulder during a weekend - Powerwall is just doing what you tell it and attempting to shift...

From the Tesla website, I guess the charge rating is different to the discharge rating Solar Integration | Tesla

For your sizing - There is a hard limit of 7.6 kW-AC of solar per Powerwall. This is relevant when the grid goes down and a large solar system is putting a lot of power into Powerwall (which can accept 5kW). You can either split your solar into two inverters (one up to 7.6kW) and only have that...

I’ve been trying to do the math on this but the ITC benefit seems to be pretty large compared to the TOU benefit. Can you walk me through your calcs?

This is exactly how Time-Based control will maximise value in 'cost savings' mode. Time-Based Control | Tesla Powerwall Modes of Operation with Solar

The chemistry used in Powerwall is different to the vehicles. Maintaining a high SOC is fine and you want to have energy available for backup events or high power draw. The ratio of Power:Energy has a bigger effect - ie if you are pulling a 5kW load, with only 20% SOC - you will do more damage...

never been used

I'll sell you silver arachnids for $2,700. If you want to powdercoat to black it will cost about $600 so I've split the difference with you.

I've got a set of silver I would let go for $3,250 plus shipping ($450) - all done for $3,700 - should leave you room for the powder coat.

i"ve got a set of silver - you could powder coat them when you get them brand new, with tires and TPMS. You can have them for $3k plus shipping (approx $450) - they usually go for $3.5k to $4k so you've got plenty of room for the powder coat.

Fair enough. Was just passing on the price from Tesla who I think charge $640 plus. Wheels are still available for anyone who is interested.

Got my Arachnids and never had them fitted as I was waiting to need new tires on the MS. Now I'm picking up my M3 and will be handing back the MS, so don't have any use for the 21" Wheels. Brand new Michelin super-sport rubber is like $2,750 - so I'm asking $4k for the lot. Pick up in Marin...

Brand new, in box Radio flyer - Red with grey wheels Received my referral prize and never opened - no kids nearby to give for Xmas so thought someone else will have better use for it - asking for $450 Can drop off in city or Palo Alto or pick up in Marin. Also got some silver 21" arachnids...

Sorry - did't realize there was a for sale section - I'll see if I can move - or if a Mod can do so

Hi All, I just got notification of my referral 21" Arachnids are on the way. I also happened to receive my radio flyer this week (red). I don't have any need for either of them so happy to find them a new home. My local service center is San Rafael - but happy to ship, if possible. I'm asking...