You've got a good grasp on the situation, but let's clarify and confirm.

Your understanding is mostly correct



Panel Limit is the key to bypassing the 120% rule (with Tesla's approval and proper installation). The Panel Limit, configured through the Tesla Site Controller, dynamically manages the total current flowing into your main panel from all sources. It's designed to ensure the combined current stays below a safe level, thus allowing the potential to exceed the traditional 120% rule constraints when properly implemented and approved by Tesla and the AHJ (Authority Having Jurisdiction). Power/Current Limit (PCS) is a per-Powerwall limitation. This setting affects the maximum output of each Powerwall 3 unit. It does not inherently address the overall panel current limit, and simply setting a Power/Current Limit (PCS) alone does not allow you to bypass the 120% rule. You're correct; it only limits what each individual Powerwall can contribute.

Addressing your specific questions


Is it correct that only the Panel Limit feature can be used to bypass the 120% rule, and PCS current limits alone are not enough? YES, that's correct. The Power/Current Limit (PCS) setting alone is not sufficient to bypass the 120% rule. The Panel Limit feature, managed by the Site Controller, is the necessary component for this. Remember, AHJ approval is also paramount.2. Can Powerwall 3 only be set to those 4 fixed output levels (48A, 41.7A, 31.7A, 24A)? Is 16A even possible? This is where we need to consult the official Tesla Powerwall 3 documentation and/or confirm with Tesla directly. From current information available, it's likely that the Powerwall 3 PCS limit settings are pre-defined fixed levels (likely related to UL standards), and not infinitely adjustable. While I don't have definitive confirmation about other settings beyond the 4 listed (48A, 41.7A, 31.7A, 24A), it seems unlikely that you could set it to 16A. The available information suggests a limited set of options. The intent is to set the lowest that is acceptable for the specific site conditions to limit the system output. Important

Always refer to the official Tesla Powerwall 3 installation manual for the most accurate and up-to-date information on available settings.

Key Takeaways and Recommendations



Panel Limit is your friend for 120% rule bypass (with proper implementation and approval). Understand how it works and its limitations. It is NOT a simple setting. Power/Current Limit (PCS) controls individual Powerwall output. This setting is useful for a variety of situations - but it is not a replacement for Panel Limit Consult Tesla Documentation

The official installation manual is your bible. It will have the most accurate information about available settings and how the system operates.

Work with a Qualified Installer

A certified Tesla installer is crucial. They will be familiar with the nuances of Powerwall 3, its settings, and the requirements for your local jurisdiction.

Engage with your AHJ

Early communication with your local permitting authority is essential. They will have the final say on whether the proposed system design (including the 120% rule bypass) is acceptable. Don't assume anything is automatically approved.

Ask Tesla Support: Tesla support can also provide clarity on configuration options and best practices.In summary, you have a solid understanding of the core concepts. The Panel Limit feature is designed to handle the 120% rule issue, while the PCS limit only restricts the output of each Powerwall. However, always verify specific settings and limitations with Tesla's official documentation and a qualified installer. They can ensure that the system is installed safely and complies with all local regulations. Flag for review