LFP, NMC or sodium-ion: which battery for a business?

Choose LFP for a battery that must work hard for ten years or more. Choose NMC only when space or weight is truly scarce, and ask for its cycle warranty in writing. Treat sodium-ion as an option to watch, and to consider for cold sites once a supplier can back it with a warranty and service in Belgium. A good business battery is designed around your use: how often it cycles, where it stands, and how long it must last.

Maybe you have three offers on the table. One lists LFP, one NMC, and a third salesperson calls sodium-ion "the future". Each one claims thousands of cycles. On forums, one user answers cycle claims bluntly: "Advertising language must always be translated correctly." Another finds that small commercial systems are "hand waving" about the battery management. Others keep lithium out of their building out of fear of fire.

What most buyers do not see is how the choice plays out over ten years. A battery that shaves your peak every working day does about 250 to 365 cycles a year. Over ten years that is 2,500 to 3,650 cycles, and a chemistry or warranty that stops at 2,300 runs out early. A battery in an unheated shed may also refuse to charge on a frosty morning. The cheapest price per kWh on the offer can end up the most expensive per kWh you actually use.

The dairy farm in Londerzeel avoided an expensive medium voltage cabin with solar panels, a wind turbine and an LFP battery system. The capacity can grow when the farm grows. A new building without a grid connection in Lokeren also runs on an LFP battery system, with a generator for dark periods.

What is the difference between LFP, NMC and sodium-ion batteries?

The three chemistries differ in what the positive side of the cell is made of, and that changes weight, lifetime, cold behaviour and price. LFP uses lithium iron phosphate. NMC uses lithium with nickel, manganese and cobalt. Sodium-ion replaces lithium with sodium, the element in table salt.

Sources for the table: the International Energy Agency (energy density, market share, price and cold behaviour), a Pylontech LFP datasheet and an LG Chem NMC warranty for the temperatures.

For a battery that stands still, a few extra kilos rarely matter. Floor space, cycles and safety matter more. That is why LFP took over stationary storage.

Is LFP or NMC better for a business battery?

For a business battery that cycles every day, LFP is better in most cases: it is built for more cycles and costs less per kWh. NMC wins only on energy per kilogram.

Look at what manufacturers put in writing. The Pylontech US3000C, an LFP module, is rated for more than 6,000 cycles at 25 °C and 95% depth of discharge (how far the battery is emptied). Its datasheet mentions an operating life of more than 15 years at 25 °C. The Pylontech lithium battery in our off-grid case carries a 10-year warranty on 80% of its capacity.

An older NMC warranty shows the contrast. LG Chem guaranteed its RESU10H home battery (9.8 kWh, NMC cells) to keep at least 60% of its energy for 10 years or 22.4 MWh, whichever comes first. That throughput equals about 2,300 full cycles. Newer NMC products may promise more, which is exactly why you compare the numbers in writing.

Now put that next to how a business uses a battery. Peak shaving to cut the capacity tariff, or storing solar power for the evening, means roughly one cycle per working day. Our article on peak shaving with a battery shows how that daily rhythm works.

Which battery chemistry is safest for a business?

LFP is harder to push into thermal runaway than NMC, and releases less heat when it happens. Thermal runaway is a chain reaction in which a cell overheats and can set the next cells alight.

Published calorimetry tests, summarised by Battery Design, put the numbers side by side. NMC cells start heating themselves at about 90 to 110 °C, LFP cells at about 150 to 170 °C. The runaway itself starts at about 170 to 190 °C for NMC and 230 to 260 °C for LFP. NMC cells released about 20 to 25 kJ per Ah, LFP cells about 10 to 15 kJ per Ah.

Want to know which rules apply on your site? Then read our guide on whether a business battery is safe: fire zone advice, permits, inspection and insurance.

Are sodium-ion batteries ready for business storage?

Sodium-ion is ready for early projects, not yet for most businesses. The International Energy Agency (IEA) sees it as a good fit for stationary storage, especially in cold climates. But production is still small, and prices have not dropped below LFP.

The facts from the IEA (February 2026) are clear. The latest sodium-ion cells store up to about 175 Wh/kg. They keep around 90% of their capacity at -40 °C and work up to 70 °C. But in 2025 their production was less than 1% of lithium-ion. At today's lithium prices they do not yet undercut LFP in most applications.

For a business, the question is not only "does the cell work?" but "who stands behind it in ten years?". A new chemistry needs a proven battery management system, a fire test of the full system, spare parts and a service partner. Until a supplier can show all of that in Belgium, sodium-ion is a pilot, not a default.

Which battery chemistry handles the cold in an unheated shed or warehouse?

Sodium-ion handles the cold best. LFP and NMC need a room that stays above freezing, or a battery with built-in heating. This matters on farms, in warehouses and on building sites.

The Pylontech US3000C datasheet shows the limit: it discharges from -10 to 50 °C, but charges only from 0 to 50 °C. On a frosty morning such a battery can deliver power but not store your solar surplus. The LG warranty for its NMC battery only holds between -10 and 45 °C.

Heat is the other side. A battery under a hot roof ages faster, and some warranties lapse above a set temperature. Our article on warranty and maintenance of a business battery shows how temperature limits work in a real warranty text.

The fix is usually simple: an insulated container or technical room, or a battery with heating, sized in the design stage. It is cheaper than finding out in January.

What do the EU battery rules change for your choice of chemistry?

The EU Battery Regulation makes chemistry and origin traceable, and it changes the value of a battery at the end of its life. Three dates are worth knowing.

• From 18 February 2027: every industrial battery above 2 kWh placed on the market needs a battery passport, an electronic record reached through a QR code. It tells you the chemistry and other data of that battery.
• From 18 August 2031: industrial batteries above 2 kWh that contain cobalt, lithium or nickel must contain a minimum share of recycled material: 16% cobalt, 6% lithium and 6% nickel.
• Recycling targets: by the end of 2027, recyclers must recover 90% of cobalt and nickel and 50% of lithium; by the end of 2031, 95% and 80%.

For the buyer this means two things. An LFP battery contains no cobalt or nickel, so it avoids the scarcest materials. And whatever you choose, plan who takes it back. Our battery recycling disassembles and recycles lithium batteries, from cars to home batteries. Our article on what a company must do with old lithium batteries explains the rules.

Which questions should you ask your supplier about battery chemistry?

Ask for numbers, not labels. "LFP" on an offer says little until you know the cells, the cycles and the conditions.

Which battery chemistry do you get from us?

We choose the battery for your use, not the other way round. Each installation is engineered and tailored to your consumption, your production and your future plans.

Our off-grid and semi off-grid projects for a dairy farm in Londerzeel and a new building in Lokeren run on LFP battery systems. For businesses we build high-power installations, modular up to 1 MW, with monitoring, control and optimisation included. The battery capacity can be expanded afterwards.

1. Step 1: Analysis and sizing: how often the battery will cycle, how deep, and in which room or container.
2. Step 2: Technical design, including the battery type, the temperature of the room and room to grow.
3. Step 3: Installation and commissioning.
4. Step 4: Monitoring and support, so you see how the battery performs and ages.

The exact brand, chemistry and warranty for your site are in your offer. Want to know what a BESS is made of beyond the cells? Then read our guide on battery storage for businesses.