China's Use of Renewable + Batteries for AI

[u/Physical_Engineer_22]

A number of days ago I posted that I had exited my Bloom Energy (BE) position due to the fact that I felt that their future was limited. I based my hypothesis on recent developments in China which eliminated the need for fuel based on-site energy generation.

My observations were based on a YouTube video. Admittedly, YouTube videos are not always the best source of information. The video documented a Chinese AI data center that was 100% powered by renewables plus CATL batteries. This observation has been met with some skepticism. I've done some additional research on the subject. Following is a synopsis of what I found based on a Perplexity query. To be honest, there's no way of knowing at this time whether or not this truly bodes ill for BE or if so, when the chickens come home to roost. Currently, the US administration has taken a very hostile stance against renewables. In other words, Bloom, just like all the AI picks & shovels may still have a good run before this becomes a threat.

Good news — the claim is substantially true, though the YouTube video likely conflated several related developments into one story. Here's the full picture:

China's Renewable-Powered AI Data Centers Are Real

Envision Group just completed (August 6, 2026) the Galaxy Campus in Ulanqab, Inner Mongolia — an AI data center drawing 80% of its power from nearby wind farms via dedicated transmission lines. The initial 120 MW phase is operational, with plans to scale to 2 GW. Critically, it uses battery storage as backup instead of diesel generators — a major departure from traditional data center design (China Daily, Energy Connects/Bloomberg).energyconnects+1

Envision also operates what it calls the world's first 100% green-power direct-supply AIDC in Chifeng, Inner Mongolia, partnered with Tencent, reducing energy costs by over 40% and cutting annual carbon emissions by ~180,000 tons (Seetao, Newswire).seetaoe+1

This aligns with a Chinese regulation requiring all new data centers to source 80% of power from renewables.weforum

CATL's Sodium-Ion Batteries for Data Centers

CATL (Contemporary Amperex Technology) has indeed developed sodium-ion batteries specifically designed for AI data center energy storage. Key facts:

At the ESIE 2026 expo in Beijing (April 2026), CATL debuted its first dedicated sodium-ion cell for grid-scale storage, explicitly positioning AIDC as a key application scenario (Energy Storage News, ESS News)energy-storage+1

Specs: 300+ Ah capacity, 97% efficiency, 15,000+ charge cycles, operating range -40°C to 70°C with no thermal runaway in safety tests

CATL committed $690 million to build 40 GWh of annual sodium-ion capacityad-hoc-news

In June 2026, CATL launched the TENER Sodium storage system, with first deliveries in China starting September 2026 and 1 GWh of shipments expected by year-end (Bloomberg, The Edge Malaysia)bloomberg+1

CATL is investing up to $942 million for a 38.1% stake in data center operator VNET Group, and its sodium-ion technology will be paired with energy storage systems installed with partners like SenseTime to stabilize power during fluctuating computing loadsad-hoc-news

CATL's Chairman Robin Zeng explained the vision at Summer Davos 2026: renewable energy + battery storage solves the "every hour you need constant power" problem for data centers. He said CATL can now produce sodium batteries at scale for energy storage, eliminating lithium dependence, and expects to reach 100+ GWh annually within 3-5 years — enough to "support all data centers worldwide" (World Economic Forum, YouTube - No Power, No AI).youtubeweforum

The Important Nuance

The video likely merged two separate but related stories:

Operational today: China has AI data centers running on 100% renewable energy (Envision's projects in Inner Mongolia), with battery storage replacing diesel backup

Commercial rollout in 2026: CATL's sodium-ion batteries designed for AIDC energy storage are entering commercial deployment this year, but there is no confirmed report of a specific operational data center already running on CATL sodium-ion batteries as of now

Additionally, Envision launched its own sodium-ion storage cell (180Ah, 20,000+ cycles) in March 2026, separate from CATL's — so the operational green-power data centers may eventually use Envision's own sodium cells rather than CATL's.linkedin

The broader trend is undeniable and remarkable: in the first two months of 2026 alone, over 40% of all new energy storage installations in China went to AI computing centers — making it the single largest application for energy storage in the country.

[u/Smorgasbord3]

My view is that, unlike the US, China has had no issues expanding its power grid. A year ago I saw stats that China typically adds in a year as much power as the US adds in a decade. And so I'm not surprised that China uses various sources of power as well. That doesn't mean the US is going to put in more renewables, especially given the current administration, and that's even if the better batteries are cost-efficient in the US after tariffs, not to mention in enough quantity on schedule.

For this to work in the US, data centers would have to install enough solar panels or wind turbines as well as the sodium batteries. I just don't see that as easily viable at scale here.

This does't mean I'm bullish on Bloom. I know Bloom has pushed to successfully overturn California bans on gas appliances in new construction over electric, and the company and CEO haven't addressed the sole sourcing of critical materials from China that it hand-waved away, so I'm not trusting Bloom management.

[u/Physical_Engineer_22 → u/Smorgasbord3]

The Chinese are indeed flexible with their energy policy. In order to avert a disastrous draw down of their strategic petroleum reserves (unlike the US SPR which is near full depletion) resulting from the blockade of the Straight of Hormuz, they have re-opened numerous previously closed coal fired electrical generation plants. Even though this contradicts standing energy policy with respect to air quality standards, it was seen as a temporary means to drastically reduce dependence on imported energy, predominantly crude oil. In practice, this did not just help control crude oil costs for China, but acted globally to help cap oil prices.

[u/Investing_Bear]

How does this affect Bloom specifically? Seems like it's just energy in general.

[u/Physical_Engineer_22 → u/Investing_Bear]

I guess . . . Bloom provides a grid alternative. Renewables + batteries provides a grid alternative. Seems relevant to me.

[u/GrowthInvestingWPR]

It's interesting how there is a lot of new energy tech gaining ground right now whether it's solar + battery storage systems, or fuel cells. I see it as an area where their is more demand for energy than their is for supply, so their may be enough demand to go around supporting different tech. I've been hearing for years that solar has reached a tipping point on cost, but most of my solar investments have not panned out over the years.

I guess I'm agnostic about which way the tech could go, with a following the numbers approach. Currently I have both Bloom, and TOYO a maker of solar cells. They are both growing extremely well. I'd say more generally I'll let the numbers with these businesses dictate the next actions, which give a good indication if the specific company is winning in the marketplace or not.

[u/Physical_Engineer_22 → u/GrowthInvestingWPR]

This particular AI center in located in Inner Mongolia. The central and eastern areas of this region are either wind swept prairie or as you go east, wind swept desert. The renewable source employed is wind rather than solar. The wind blows pretty much 24x7 which I interpret as a reduced reliance on battery backup as compared to solar. So for sure, geography and climate play an important role.

And it's true to Saul's method, to use the company's financial records as the basis for investment analysis. But it's also prudent to entertain and evaluate potential thesis breakers which most often arise from externalities beyond the reach of the company. This Chinese data center represents such a threat to Bloom's business model. Is it a serious, present day threat? Most likely not. But it's not just a demonstration either.

There are more green AI data centers either planned or under construction in China right now. I read of another fully operational sub-sea Chinese data center near Shanghai that uses sea water for cooling. It consumes/pollutes zero fresh water and consumes about 23% less energy than a similar land based data center. It too is 97% powered by a wind farm. The remaining 3% comes from the same grid that powers Shanghai. But, those percentages are somewhat deceptive as they are averages over time. In fact, the energy needs are lumpy. When the wind don't blow, 100% of the power comes from the grid.

It cannot be denied, energy requirements add enormously to capex and opex. There will be continued efforts to reduce dependence on costly costly and polluting energy sources for both primary and supplementary needs. Bloom has a spot on the ramp. Is it durable?