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210Ah Sodium-Ion Prismatic Cell (Layered Oxide) 3.0V, 630Wh, Freight & Duties Included
210Ah Sodium-Ion Prismatic Cell (Layered Oxide) 3.0V, 630Wh, Freight & Duties Included
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- ✓ Datasheet available before it ships
- ✓ Specs reviewed by battery engineer
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210Ah Layered Oxide Sodium-Ion Prismatic Cell: The High-Energy Sodium Option for Stationary Banks
This 210Ah sodium-ion prismatic cell packs about 630 Wh into the same footprint as the 280Ah to 314Ah LFP cells most DIY builders already know. It uses a layered oxide cathode, the higher-energy branch of sodium-ion, so it stores about 30% more energy per cell than our 160Ah NFPP cell at the same size. No lithium, no cobalt, and it discharges in deep cold where LFP gives up.
Footprint: 173.7 mm wide and 204.6 mm tall, same width and 2.6 mm shorter than a 280/314Ah LFP cell. It is 73 mm thick, about 1.3 mm thicker per cell, so a 4-cell stack runs about 5 mm longer. Our compression plates fit this footprint; just leave a little extra rod length.
What you get when you buy cells from OGS
We've spent years building relationships with the cell factories we buy from, ordering from them again and again and checking what shows up. We only list cells from reputable manufacturers we trust, so you're not gambling on an unknown seller or a listing that doesn't match the cell in the box.
- Vetted suppliers: these cells come from the same sodium-ion factory that supplies our 18650 and 160Ah cells.
- Specs we've actually read: we go through the full datasheet for every cell we sell and put the numbers that matter (charge limit, low cut-off, temperature limits, BMS settings) on this page.
- Your batch, confirmed: we send you the manufacturer, model, and datasheet for your cells before they ship. If it isn't what you expected, we cancel and refund before anything ships.
- One point of contact: if a cell arrives damaged or out of spec, you deal with us, not a factory sales rep on the other side of the world.
- Freight, duties, and customs handled: the price includes delivery to the US mainland. No surprise tariff bills.
- Lead time: large prismatic cells ship by sea, typically 7 to 9 weeks to your door. Need them sooner? Email us about air freight.
📐 Cell Specifications
- Format: 210Ah large-format prismatic
- Chemistry: Layered oxide cathode, hard carbon anode
- Nominal Voltage: 3.0 V
- Nominal Capacity: 210 Ah (≈630 Wh, ~134 Wh/kg)
- Voltage Range: 1.5 to 3.9 V
- Standard Charge Rate: 0.5P (about 105 A)
- Max Continuous Discharge: 1P (about 210 A)
- Cycle Life: ≥5,000 cycles at 0.3P, 90% DOD, 25 °C
- Charge Temperature: −10 °C to 55 °C
- Discharge Temperature: −40 °C to 60 °C
- Weight: 4.70 kg
- Dimensions: 204.6 × 173.7 × 73 mm (H × W × T)
- Terminals: M6 threaded studs (factory welded)
"P" is a power rate: 1P means discharging the cell's rated energy in one hour, about 210 A at 3.0 V.
⚡ Cold-Weather Behavior
- Discharges down to −40 °C. LFP loses a large share of its capacity in that cold.
- Charges down to −10 °C. That is 10 °C colder than LFP or our 160Ah NFPP cell will accept a charge. Charge gently in the cold and let your BMS reduce current below 0 °C.
What that means for a shed or cabin bank: on a −20 °C morning this cell still carries your loads. It will take a slow solar charge once the cells climb above −10 °C, while an LFP bank waits until it's above freezing.
🧪 Layered Oxide vs NFPP: Which Sodium-Ion Cell Should You Buy?
We carry both large-format sodium chemistries. They share a footprint but solve different problems.
| Characteristic | 210Ah Layered Oxide (this cell) | 160Ah NFPP |
|---|---|---|
| Energy per cell | ≈630 Wh | ≈480 Wh |
| Voltage window | 1.5 to 3.9 V | 1.5 to 3.8 V |
| Cycle life (rated) | ≥5,000 | ≥6,000 |
| Lowest charge temperature | −10 °C | 0 °C |
| Thermal stability | Moderate to high | Very high (phosphate cathode) |
| Pick it when | You want the most kWh per cell and per dollar of rack space | You want the longest cycle life and the most abuse margin |
More in our NFPP vs NFM (layered oxide) guide.
🔋 Pack Sizing: 12V, 24V, and 48V Banks
| Target Pack | Series | Nominal | Full Charge (3.9 V/cell) | Energy | Order |
|---|---|---|---|---|---|
| 12V | 4S | 12.0 V | 15.6 V | 2.5 kWh | 4-pack |
| 24V | 8S | 24.0 V | 31.2 V | 5.0 kWh | 2 x 4-pack |
| 48V | 16S | 48.0 V | 62.4 V | 10.1 kWh | 16-pack |
Check your inverter before you pick a series count. Layered oxide has the widest voltage window of any cell we sell. A 16S pack charged to 3.9 V per cell reaches 62.4 V, above the 58 to 60 V battery limit of most 48V inverters, and most of those inverters shut off around 40 V (2.5 V per cell at 16S). Two common fixes: charge a 16S pack to about 3.6 V per cell (57.6 V) and give up some capacity at the top, or run 15S (45 V nominal, 58.5 V full). Match the pack to your inverter's battery input window, not to the nameplate voltage.
🛠 Integration Notes (Read Before Building a Pack)
- BMS required with balancing. A stock LFP or lithium-ion BMS will not work out of the box. Use a programmable unit (JK, Daly, ANT) that accepts sodium cut-offs.
- Charge limit: 3.9 V per cell, never higher. Do not use an LFP or lithium-ion charger profile without reconfiguring it.
- Low cut-off: 1.5 V is the absolute floor. Most of the usable energy is above about 2.5 V per cell, so a 2.0 to 2.5 V working cut-off costs very little capacity and adds margin for cell drift.
- Cold charging: set a low-temperature charge cut-off at −10 °C and reduce charge current below 0 °C.
- Compression: clamp the stack evenly. Our compression plates fit this footprint.
- Don't mix cells: never mix part numbers, revisions, or batches in one series string. Buy every cell for a bank, including spares, in one order.
- Storage: if the cells will sit more than 3 months before you build, keep them at room temperature, check voltages every 3 months, and top up any cell drifting toward 1.5 V.
📋 Warranty & Arrival
- Factory defects: cells that arrive outside specification are handled with the factory. Keep your BMS logs of cell voltages and temperatures, because they are needed to evaluate any claim.
- Not covered: over-discharge below 1.5 V, overcharge above 3.9 V, charging outside −10 to 55 °C, physical damage, and moisture damage.
- Arrived damaged? Photograph the packaging and cells before you unpack further and contact us within 48 hours of delivery.
Datasheet: email us and we'll send the current factory specification for this cell.
