Fluence Energy stock pops on Siemens/Nvidia announcement but gains may be short lived

Munich-headquartered Siemens says its had developed a DSX Vera Rubin-aligned reference design in collaboration with Nvidia (NVDA) and Fluence Energy FLNC.

The firm’s announcement of a deployable, industrialized electrical, power, and control architecture purpose-built for hyperscalers, colocation providers, and specialized cloud infrastructure operators sent FLNC up some 40% on June 1^st.

Despite its meteoric run this morning, Fluence Energy stock remains a muted investment for 2026, still down roughly 18% versus its year-to-date high.   

Should you chase the momentum in Fluence Energy stock

Disciplined investors should treat the massive surge in FLNC shares today as an opportunity to cut exposure rather than initiating a new position.

Why? For starters, the Siemens/Nvidia announcement is a “reference architecture” – a blueprint of what data centers could look like – not a firm purchase order or exclusive supply deal.

In other words, markets may price in revenue that isn’t yet contracted.

Importantly, in this partnership, Fluence isn’t even the star of the show – Siemens and Nvidia are. FLNC’s role is just battery storage within a broader system.

If hyperscalers adopt the reference design selectively – taking Siemens’ electrical architecture but sourcing storage elsewhere – Fluence’s actual revenue uplift could be rather limited.

Q2 earnings warrant trimming exposure to FLNC shares

Caution is warranted in playing Fluence Energy shares at current levels also because the company missed topline expectations in its fiscal Q2, with the filing highlighting international exposure to tariffs, shifting commodity costs, and logistics headaches.

The Nasdaq-listed firm concluded its latest reported quarter with nearly $465 million in revenue, significantly below the $622 million that analysts had called for.

FLNC’s strong backlog and reaffirmed full-year guidance (2026) are prominent talking points, but a backlog is only as good as its conversion rate – and the company’s revenue miss shows execution risk remains real.

Simply put, the backlog isn’t new revenue yet, and that’s concerning given Fluence Energy Inc is currently trading at a rather stretched 9x price-to-book (P/B) ratio.

Technicals aren’t particularly in favour of Fluence Energy either

Investors must also note the high short interest as a potential catalyst, meaning today’s spike in the FLNC stock may partly be a short squeeze rather than a fundamental re-rating.

Even from a technical perspective, the battery storage specialist isn’t particularly attractive – given the firm’s relative strength index (RSI) now sits near 70, indicating it’s approaching “overbought” conditions that often trigger a pullback.

And it’s not like Fluence Energy pays a healthy dividend to incentivize ownership despite the above-mentioned risks. Crucially, Wall Street analysts also view the rally as “overdone”.

Consensus rating on the Nasdaq-listed firm sits at “hold” only, with the mean price target of about $18.47 signaling potential downside of more than 30% from the current price over the next 12 months.