Tesla Powerwall Self Powered vs Time Based

I absolutely have the same view on how end-users should wisely configure the different energy production and usage profiles! Well done and great video!

They should add a seperate inverter for the car home charger so that it charges at 8 kilowatts instead of 5. Imagine that! I saw a gentleman that built a solar garage that Maximized solar for his teslas. Really cool idea. Problem is that the battery only allows so much to pass through

What you’re talking about wanting to happen in this video can be done by using smart SPAN electrical panels. This way you can utilize critical, nice to have or not important ranges for all circuits in your house.

I think, I'm similar to you. My TOU is 4pm - 9pm. Right now solar continues to run my house till 6pm. But TOU kicks battery in at 4pm. I'd rather TOU kick in at 6pm - 9pm then run off grid at much lower rate. Probably using 6% of 2x batteries. But it's either time based 4pm-9pm or 6pm'ish" till following morning. I also make every effort to charge car during day off solar.

I have a grid-tied PV system and am on a NEM plan that gives me credits for any excess, I send them and then use the credits when I pull more grid power when needed. At the end of the year, any excess is "GIFTED" to my utility. My system is oversized so I will always OVER PRODUCE power on an annual basis. With that does it matter what I COULD pay or receive given I never get a bill now aside from my $15/mo connect fees?

it makes sens that utility buys your power at wholesale rates, similar to how they buy power from other powerplants, these non bypassable sharges on top of the difference between what the utilities buy your power and retail rate they sell power to you is how they "tax" you to pay for the infrastructure. I am trying the self powered mode to see if it makes more sense cost wise by reducing my non bypassable charges. When April bill shows up, will compare it to April 2023 to see if I see a difference in total cost. ( 7.4kw solar plus three powerwall 2 )

I question if Time Based Control (TBC) actually results in the lowest power bill. Even when I set the buy and sell prices the same, TBC exports my entire batteries (excluding the Backup Reserve) to the grid during peak hours and then uses grid power until the solar starts producing the next morning. As such, it is not taking into the non-bypassable charges or ~10% loss of running power through the batteries (i have two Powerwall 2's). I run my system similar to what you noted in the video, in that I try to use power (charge Powerwalls and car, run clothes dryer, etc.) during the middle of the day when I have excess solar generation. Ideally, TBC would learn how much power I need to make it through the night (about 30% on a normal day) and only export the difference being about 60% of the batteries (100% - 10% Backup Reserve - 30% night time use = %60%). Better yet, TBC would look at the weather, air quality and my usage pattern and hold back more power on hot days when I normally run the AC or when I can't open the windows at night to cool the house down when air quality is poor. Does anyone know of a 3rd party app that provides more flexibility in operating the Powerwalls?

You were complaining that during the peak time the system sends all solar to the grid and feeds the house entirely from the battery. I had the same complaint, and then I realized it was because I had set my sell price the same as my buy price during peak, and the system was trying to maximize profit. After I set the sell price to the same price as the off-peak sell price, then during peak the system ran off solar and supplemented with the battery, and only sent power back to the grid when there was more solar than the house needed. Apparently there are some locations where you cannot send battery power back to the grid and so Tesla does not allow that option.

If you have enough battery storage, just go to slef-powered in CA under PG&E. You will never make money.