Tesla's fiscal 2022 annual report, filed with the SEC on January 31, 2023, marks the year the energy segment grew large enough that the margin question stops being premature. For the first several years, asking whether Megapack pencils was unanswerable — there was too little volume. By FY2022, with storage deployments rising materially, the 10-K finally gives a markets desk enough scale to take the unit-economics question seriously.

The framing that matters is the shift from deployment to profitability. Earlier filings told you storage was growing; the relevant FY2022 question is whether that growth carries gross margin or merely revenue. A containerized utility product like Megapack improves its economics through manufacturing scale — lower cost per MWh as the Lathrop factory ramps and as the production line matures. Scale is the lever, and FY2022 is the first year there is real scale to lever.

From a does-it-pencil seat, three variables drive the answer: cost per MWh installed, average selling price, and the mix between higher-margin Megapack and other energy products. The annual report describes a business moving in the right direction on volume; the durable question is whether cost-down outpaces any ASP pressure as the product scales. A segment can grow revenue fast and still carry thin margins if pricing falls as quickly as cost.

There is a structural advantage worth restating. Tesla funds its storage ramp from an automotive business that is, by FY2022, solidly profitable. That internal capital lets Megapack scale manufacturing without a dedicated raise, which a stand-alone storage developer cannot match. It does not guarantee segment profitability, but it removes the financing constraint that throttles many storage businesses at exactly this stage.

What the FY2022 10-K still does not hand a reader is a clean, isolated Megapack margin number to model in perpetuity. It gives the trajectory and the drivers — scale, factory ramp, mix — and lets you reason about direction. Pinning the per-unit economics precisely remains a job for the segment detail in this and subsequent filings.

We analyze, we don't advise. The honest verdict from the FY2022 annual report is that Megapack is now big enough to judge on economics, not just ambition — and that the judgment turns on whether cost-per-MWh falls faster than price as the business scales.

Figures from the filing on sec.gov, indexed by EdgarBeast.