Tesla's first-quarter 2025 Form 10-Q, filed with the SEC on April 23, 2025, contains a single sentence that captures the entire storage-margin debate. The filing credits higher Megapack and Powerwall deployments for the period's energy performance, then notes a decrease in Megapack's average selling price. Volume up, price down — that tension is the whole game for a storage-economics desk.
Falling ASP is not automatically bad news. In a maturing, scaling hardware business it is often the expected consequence of lower cost per MWh being shared with customers to win volume — the same dynamic that drove the segment's earlier margin gains. The question the Q1 filing forces is whether the price decline is tracking a cost decline (margin-neutral or better) or outrunning it (margin-dilutive). The 10-Q states the direction of price; it leaves the reader to weigh it against cost.
The bullish reading is that lower Megapack prices are a deliberate lever: as the Lathrop Megafactory and the newer Megafactory capacity drive unit costs down, Tesla passes some of that to buyers to accelerate deployment and defend share in a competitive utility-storage market. Higher volume at a slightly thinner per-unit margin can still expand total gross profit dollars. That is the does-it-pencil case for the quarter.
The bearish reading is the mirror image: if ASP is falling because the storage market is getting more competitive faster than Tesla's costs are coming down, then the deployment growth is being bought at the expense of margin quality. The same revenue line can reflect either story, which is why a markets reader has to hold the volume and the price together rather than celebrate the deployment figure alone.
What the Q1 2025 10-Q does not isolate is the precise per-MWh cost trend in the quarter, which is the variable that would settle the debate. The filing gives volume direction and price direction cleanly; reconciling them into a margin verdict requires the cost side, which lives in the segment detail and the cadence of subsequent filings rather than in this single quarter's MD&A line.
We analyze, we don't advise. The honest read of Tesla's storage business in Q1 2025 is that it has reached the stage every successful hardware product reaches — where the interesting question is no longer whether it sells, but at what price and what cost it sells. The deployment number is the headline; the ASP line is the one to think about.
Figures from the filing on sec.gov, indexed by EdgarBeast.