China’s Battery Tax Landed the Month Sodium Was Supposed to Catch a $108 Lithium Pack
The chart that made batteries look inevitable just grew a kink. For fifteen years the story was a clean slide: lithium-ion packs that cost about $1,474 a kilowatt-hour in 2010, in today’s dollars, landed at $108 in 2025. BloombergNEF’s December 9, 2025 survey called that an 8 percent drop from 2024 and a record low, a 93 percent collapse from the start of the decade-and-a-half. The drop happened while cobalt jumped on Congo export quotas and lithium ticked up. In 2022 that kind of metal shock was the only year BNEF has ever logged an annual pack-price increase. In 2025 the factories ate it. September 2026 is the month the factories started sending the bill back.
On September 1, a Chinese consumption tax of 2 percent landed on mercury-free primary cells, nickel-metal hydride, lithium primary batteries, lithium-ion batteries, and vanadium flow batteries. Export product can still claim a rebate, which is a polite way of saying the tax bites harder at home. CATL, the world’s largest battery maker, had already nudged its 314 amp-hour storage cell from 0.414 yuan per watt-hour to 0.423. EVE Energy told customers the surcharge would sit on top of the base price from the same date. Gaogong Storage’s tracking shows the average 314 amp-hour storage cell climbing from about 0.28 yuan per watt-hour early in 2025 to roughly 0.38 by mid-2026. The first half of that climb was a shortage. The second half is tax plus ore. At an average near 0.36 yuan per watt-hour, the new levy is only about 0.007 yuan. Small on a sticker. Large as a signal. The industry that absorbed a metal spike in 2025 is no longer pretending every input is free.
What $108 Actually Bought
BNEF built the $108 figure from hundreds of data points across passenger cars, buses, commercial vehicles, two- and three-wheelers, and stationary storage. Battery-electric vehicle packs averaged $99 per kilowatt-hour, the second year under the round number Detroit used to treat as science fiction. On that benchmark a 60-kilowatt-hour pack is about $5,940 at the factory gate, and a 100-kilowatt-hour pack is about $9,900. Replacement at a dealer is a different invoice, because labor, logistics, and warranty are not in the cell.
Geography is the rest of the price. Chinese packs sat near $84. North American packs ran about 44 percent higher. European packs ran about 56 percent higher. China posted the steepest annual decline, about 13 percent. Europe fell about 8 percent. North America fell about 4 percent. Stationary storage did the violent move: packs headed for the grid dropped 45 percent in a year, to $70, and became the cheapest segment on Earth. The floor BNEF actually recorded was $36 at the cell and $50 at the pack, both lithium iron phosphate going into storage. Across every use, LFP packs averaged $81. Nickel-manganese-cobalt packs averaged $128. The chemistry that skips cobalt and nickel is eating the chemistry that does not.
BNEF’s own note, written before the September tax, still pointed to another dip in 2026, to just under $105, about 3 percent, even with tariffs and ore pressure. Evelina Stoikou, who runs the firm’s battery-technology desk, called the 2025 result “cut-throat competition” and an opening to cut electric-vehicle prices and to put storage behind wind and solar instead of talking about it. A tax and a round of cell-price notices do not erase $105 as a forecast. They do mean the next survey has to explain a policy, not just a learning curve. Analysts who treat Chinese overcapacity as a permanent discount are about to meet a finance ministry.
One Hundred Eight Gigawatts, Then a Salt Battery
The volume behind the price is no longer theoretical. The International Energy Agency’s Global Energy Review 2026 called battery storage the fastest-growing power technology on the planet. In 2025 the world installed 108 gigawatts of new storage, about 40 percent more than 2024 and eleven times the 2021 base. Some trackers put the energy figure near 275 gigawatt-hours. Utility-scale took about 87 gigawatts, roughly four-fifths. China alone added just over 63 gigawatts, about 58 percent of the global total. An IEA commentary on May 29, 2026 noted that 108 gigawatts is more than the historical peak for new gas plants, about 107 gigawatts in 2002. Lithium iron phosphate is about 90 percent of storage deployments. Five years ago it was under half.
Cars still eat more than 70 percent of lithium-ion demand. About one in four cars sold worldwide in 2025 was electric. Grid batteries and backup for data centers are the fast-growing remainder. The overall market topped $150 billion. Global lithium-ion deployment ran about six times the 2020 figure. Forecasts for 2026 deployments sit near 158 gigawatts. The machines are getting cheaper and more numerous at the same time, which is why a 2 percent tax matters. It lands on a flood, not a trickle.
Sodium was supposed to be the escape hatch if lithium ever spiked again. It is having a more complicated year than the slogans. CATL certified its Naxtra sodium-ion cell to China’s GB 38031-2025 safety rule, claims about 175 watt-hours per kilogram, an operating window from minus 40 to plus 70 degrees Celsius, and an 80 percent charge in about 15 minutes. In April 2026 the company put a storage-specific sodium platform on stage and signed a three-year, 60 gigawatt-hour supply deal with HyperStrong, with first energy-storage deliveries aimed at September 2026. Lin Jiubiao, a CATL storage executive, has said the company’s goal is sodium cells at LFP cost by the end of 2026, and that shipments should reach the gigawatt-hour scale. On September 15, CATL Australia chairman John Kwon told the Australian Financial Review Asia Summit that sodium-ion would probably match lithium-ion on cost by early 2027, a shift he framed as pressure on Australia’s lithium export trade.
Three Sodiums, and a Cobalt Bill That Did Not Vanish
Sodium-ion is not one battery. Layered-oxide cells hold the most energy and are the ones aimed at cars; they can still use nickel and manganese. Prussian-blue chemistries were the cheap, fast bet in Europe and the United States, and several of those firms did not survive the last lithium crash. Phosphate sodium cells store less and last longer, and they accounted for the bulk of China’s sodium shipments in 2025. When lithium carbonate collapsed by roughly 90 percent from its late-2022 peak, Chinese LFP cells fell toward $40 to $45 and sodium’s cost advantage disappeared. Natron and Northvolt were among the casualties. BNEF cut its sodium forecasts. Then lithium roughly doubled off the bottom, still far under the peak, Chinese stockpiles thinned, and CATL suspended output at one of its own lithium mines. Sodium came back as insurance. A cell that still pencils at $70 to $90 against LFP at $40 to $45 is not the default for a project signing contracts this year. It is the hedge, and the cold-weather tool, because vendor claims of usable power near minus 40 degrees are the one place LFP still looks clumsy.
The dirt under both chemistries did not get cleaner because the sticker fell. A large share of lithium and what remains of the cobalt trade is still processed in China. The human and environmental cost of cobalt mining did not expire when LFP took the storage market. Recycling of copper, aluminum, and battery metals is still a rounding error next to 108 gigawatts a year. Those are real constraints. They are no longer an excuse for a $1,400 pack. They are also no longer an excuse for pretending the price only moves one direction. A tax, a mine suspension, and a salt battery that might tie LFP on cost in 2027 are the same story: storage got cheap enough to rewire grids, and cheap enough that governments and ore markets noticed.
The generation sitting in front of those packs is the other half of the problem. The AEGIS Alliance has reported on solar-powered desalination and on an iceberg-shaped floating tower sold as a climate machine. The industrial uses mainstream coverage skipped, including materials that can stand in for petrochemicals, are in the file on nine uses of hemp. More of this beat is in Environment and Tech News.
