When I had my Tesla Solar installed, I moved away from the Powerwall due to the cost and NEM. Yet after calculating how much my 1.4kw battery backup system is, where NEM2 is heading and what I am seeing as actual productions from my new solar, I am starting to think PW2 might not be a bad idea. I have a couple things I want to toss you guys to see if makes sense.
1. I have Tesla Solar on my E facing roof, 3.8kw making about 20kwh per day (likely more, but estimate conservative number). Sunpower 2.0kw making about 9kwh per day. They are on separate inverters on the same 200a main panel. My question is can I charge the battery with both solar or can it only be one or the other?
2. My house has 200A service to the main and 100A to the sub panel. I understand one PW is not enough to charge cars or run my AC, yet it is plenty to run the rest of the items in the house. How does Tesla setup the PW to not power the other items that I can't run or do I trigger overload?
3. I would be interested in the cost saving component due to the NEM2 and EV2-A. I can power the house and charge the battery from empty to full before 3PM barring bad weather. If anything, I might even overflow since I get 13kw before 3PM net of my usage. What happen if I generate more, I am assuming I pass it back to the grid without getting anything? This is after my usage too as I only burn about .8kwh during the day 1.2kwh at night. My 14SEER AC and the cars are what kill my electric bill.
4. Does the battery always default to sending all power to the house before charging or can you change it to not use it? In my scenario, I am hoping to use all solar for home usage as soon as it starts generating. Any excess should go back to the battery (I will likely set it to 10-15% reserve). I should start feeding the battery at about 9AM and the battery should be full by 2 or 3PM. I want to then stop charging the battery and use battery only except when I hit 15%. In the perfect world, that would be 11PM. That would basically shoot my peak electric bill to zero and I am really paying for the car's charging and a few kw I use at night. If I get lucky and have extras, I will drain it overnight and have 2 or 3kw ready for the morning. Rinse and repeat. I guess on rainy days I would be screwed as I would have to buy everything from the grid.
5, What is the labor cost for one PW2? I already have the panel and their solar.
Am I off base or not?
1. I have Tesla Solar on my E facing roof, 3.8kw making about 20kwh per day (likely more, but estimate conservative number). Sunpower 2.0kw making about 9kwh per day. They are on separate inverters on the same 200a main panel. My question is can I charge the battery with both solar or can it only be one or the other?
2. My house has 200A service to the main and 100A to the sub panel. I understand one PW is not enough to charge cars or run my AC, yet it is plenty to run the rest of the items in the house. How does Tesla setup the PW to not power the other items that I can't run or do I trigger overload?
3. I would be interested in the cost saving component due to the NEM2 and EV2-A. I can power the house and charge the battery from empty to full before 3PM barring bad weather. If anything, I might even overflow since I get 13kw before 3PM net of my usage. What happen if I generate more, I am assuming I pass it back to the grid without getting anything? This is after my usage too as I only burn about .8kwh during the day 1.2kwh at night. My 14SEER AC and the cars are what kill my electric bill.
4. Does the battery always default to sending all power to the house before charging or can you change it to not use it? In my scenario, I am hoping to use all solar for home usage as soon as it starts generating. Any excess should go back to the battery (I will likely set it to 10-15% reserve). I should start feeding the battery at about 9AM and the battery should be full by 2 or 3PM. I want to then stop charging the battery and use battery only except when I hit 15%. In the perfect world, that would be 11PM. That would basically shoot my peak electric bill to zero and I am really paying for the car's charging and a few kw I use at night. If I get lucky and have extras, I will drain it overnight and have 2 or 3kw ready for the morning. Rinse and repeat. I guess on rainy days I would be screwed as I would have to buy everything from the grid.
5, What is the labor cost for one PW2? I already have the panel and their solar.
Am I off base or not?