Editing this old question for accuracy in case anyone else sees this. Removed incorrect calculations. Also, I don't think it was ever answered what internal battery DC voltage is. Any ideas?
So what I know is
- that the battery is a 13.5 [kWh] battery assuming a discharge/charge rate of 3.3 [kW]
- The DC voltage range is 350-550 [V]
- The internal battery DC voltage is 50 [V] (what is this???)
- Continuous current is 14.3 [A]
- Power (continuous) is 5 [kW] (charge/discharge)
Here's what I don't know:
- What internal battery DC voltage is
- If the DC Tesla PowerWall 2 has a limit to how many PowerWalls you can stack in parallel (pretty sure this is a manufacturer question so you can ignore this one)
- Why the AC Tesla PowerWall 2 specifies a limited number you can stack (I do now know that inverters usually have a limit to how many you can hook in parallel unless they are grid-tied, and I'm pretty sure this is a manufacturer question too so you can ignore this one).
Here's what I want to calculate with the information I have (need this information for a program called HOMER legacy):
- Nominal capacity (in amp-hours)
- Nominal voltage for DC version
Data sheet link: https://docs.google.com/viewerng/viewer?url=http://www.solarquotes.com.au/blog/wp-content/uploads/2016/11/Powerwall-2-DC_Datasheet_English.pdf&hl=en_US