A sodium ion deep cycle battery is a house battery for campervans, camper trailers and 4WD dual battery setups, built on sodium ion chemistry instead of lead acid or lithium iron phosphate. The SaltyCells DC210 is 12V 210Ah (2,520Wh), rated to 6,000 cycles to 70% capacity, and discharges down to minus 30°C.
Why a sodium ion deep cycle battery is worth a look
If you have ever sat in a campsite at 6am watching your fridge alarm flash because a 100Ah AGM house battery gave up overnight, you already know the problem. Lead acid deep cycle batteries are cheap to buy but heavy, slow to charge and only really give you about half their rated capacity back. Lithium iron phosphate fixes most of that, but it costs more and many packs will not charge below 0°C, which matters on a frosty morning in the high country.
Right now, most deep cycle batteries on the market are lithium, so lithium is what most people end up buying by default. It is a good chemistry, but it brings a real safety concern when it is packed into a hot vehicle, a camper trailer or under a bed, because lithium cells can go into thermal runaway if they are damaged, overcharged or overheated. Sodium ion is the alternative, and it is widely regarded as a much lower fire risk. It is now available in Australia as a deep cycle battery. I started SaltyCells to bring sodium ion to Australian vehicles, and our starter range has been the focus so far. The DC210 is our first house battery, aimed at people who live off grid for days at a time and want something that tolerates our heat, our cold and our corrugations.
This guide covers what the DC210 actually is, the numbers from the manufacturer's datasheet, how it compares with AGM and lithium, and what it does not do. If you are choosing a battery to start your engine, you want a different product. We cover that further down, and in our 4WD battery guide.
What is the SaltyCells DC210?
The DC210 (SKU SC-DC210) is a 12V sodium ion battery with 210Ah of capacity, which works out to 2,520Wh of stored energy. It is a house battery, not a cranking battery. Think fridge, lights, water pump, diesel heater, inverter and device charging, not turning over a 3.2 litre diesel.
Here are the datasheet figures from the manufacturer:
| Specification | SaltyCells DC210 |
|---|---|
| Chemistry | Sodium ion |
| Nominal voltage | 12V |
| Capacity | 210Ah at 0.2C |
| Energy | 2,520Wh |
| Cycle life | 6,000 cycles at 0.2C to 70% capacity |
| Standard charge current | 40A |
| Maximum charge current | 100A |
| Maximum charge voltage | 15.6V |
| Continuous discharge current | 100A |
| Peak discharge | 200A for 1 to 2 seconds |
| Charge temperature | minus 10°C to 60°C |
| Discharge temperature | minus 30°C to 60°C |
| Dimensions (L x W x H) | 387 x 206 x 273mm |
| Weight | 25kg |
| Terminals | M8 |
| Warranty | 5 years |
Two honest notes. First, the cycle rating is the manufacturer's laboratory figure at a gentle 0.2C rate, so treat it as a ceiling, not a promise for every trip. Second, the datasheet is supplied by the manufacturer and subject to change, so always confirm wiring and charger settings for your application before installing.
Sodium ion vs AGM vs lithium for a deep cycle battery
Most Australians shopping for a house battery are choosing between AGM and lithium iron phosphate (LiFePO4). Here is where sodium ion sits. The AGM and LiFePO4 columns are typical market figures for 200Ah class batteries, not specific brands, so check the product you are actually considering.
| Sodium ion (DC210) | AGM 200Ah (typical) | LiFePO4 200Ah (typical) | |
|---|---|---|---|
| Rated energy | 2,520Wh | 2,400Wh | About 2,560Wh |
| Practical usable energy | Check depth of discharge guidance when you order | About 1,200Wh (50% rule of thumb) | About 2,300Wh or more |
| Cycle life | 6,000 to 70% (manufacturer rating) | Roughly 400 to 800 | Roughly 3,000 to 6,000 |
| Weight | 25kg | About 55 to 62kg | About 20 to 28kg |
| Discharge in cold | Down to minus 30°C | Reduced capacity | Works |
| Charging in cold | Down to minus 10°C | Slow | Many packs stop below 0°C |
| Fire and thermal runaway risk | Considered much lower than lithium (no lithium or cobalt) | Low, but can vent hydrogen if overcharged | Lower than other lithium types, but a real risk if damaged or overcharged |
| Maintenance | None | None (sealed) | None |
The practical takeaway: against AGM, a sodium ion house battery gives you roughly double the usable energy at less than half the weight, and it should outlast several lead acid replacements. Against lithium iron phosphate, the case is less about raw capacity and more about safety, cold weather charging and long life. If you want the deeper chemistry comparison, read sodium ion vs lithium car battery and what is sodium ion.
How long will 210Ah run your gear?
Capacity numbers only mean something when you turn them into days. Here is a rough guide using typical Australian camping loads. These are estimates, so measure your own fridge and loads for a real answer.
| Load | Typical draw | Approx. energy per day |
|---|---|---|
| 12V compressor fridge (40 to 60L) | 35 to 50Ah in warm weather | About 420 to 600Wh |
| LED lighting | 3 to 5Ah | About 40 to 60Wh |
| Water pump and device charging | 5 to 10Ah | About 60 to 120Wh |
| Diesel heater (cold nights) | 10 to 20Ah | About 120 to 240Wh |
| Starlink or laptop work | 20 to 40Ah | About 240 to 480Wh |
A typical weekend setup with a fridge, lights and charging uses roughly 1,000Wh a day. Against 2,520Wh, that is over two days with no sun at all, and effectively unlimited with 200W or more of solar. A full time tourer running a fridge, heater and internet might double that and want solar plus a DC to DC charger. For solar planning, our caravan battery guide walks through the sums.
Safety: why sodium ion is a lower fire risk
This is the part most house battery guides skip. Lithium batteries store a lot of energy in cells that can overheat and keep heating once a fault starts, which is called thermal runaway. In a caravan or campervan, that battery sits a metre from where you sleep, often in a hot, enclosed space, and it gets shaken over corrugations for years.
Sodium ion cells use a different chemistry with no lithium and no cobalt. The industry view is that this makes them considerably less prone to thermal runaway and fire than lithium cells, and that is a big part of why sodium ion is attracting so much attention for vehicles and home storage. That said, no battery is fire proof. A sodium ion battery still stores serious energy, so it needs correct fusing, proper cable sizing, a secure mounting and a charger set to the right voltages. We have not published independent abuse test results for the DC210, so we say lower risk, not zero risk.
Where the DC210 fits (and where it does not)
It suits: campervan house banks, camper trailers, caravans, canopy and ute fit outs, and 4WD dual battery systems with a DC to DC charger. It also suits off grid cabins, sheds and backup power where weight or temperature range matters.
It does not suit: starting an engine. The DC210 is a deep cycle battery, not a cranking battery. For your vehicle's starter, choose from our starter range, for example the SC-NA1280 for many larger 4WDs and utes, and always check the fitment finder first. If you are building a full touring rig, our camping and 4WD touring guide explains how the starter and house batteries work together.
Charging matters. Sodium ion has its own charge profile. Before you connect a DC to DC charger, solar controller or mains charger, check that it can be set to the voltages in the datasheet (maximum 15.6V) and that the manufacturer or its supplier supports it. If you are unsure, email hello@saltycells.com.au with your charger model and we will tell you honestly what we know.
Which SaltyCells battery should you choose?
| Use case | Recommended | Why |
|---|---|---|
| Campervan or camper trailer house battery | SC-DC210 | 2,520Wh of deep cycle energy, 25kg |
| Larger or off grid setup needing more | SC-DC300 (pre-order, estimated specs) | 300Ah class, still confirming final specs |
| Starting your 4WD or ute | SC-NA1280 or the model confirmed for your vehicle | Cranking power, drop in fit |
| Starting a small or mid size car | SC-NA1260 or SC-NA1270-280 as confirmed | Check the fitment finder |
🔋 Recommended SaltyCells Batteries
The DC210 is the house battery. Pair it with the right starter battery for your vehicle, and always check the fitment finder first.
210Ah · 2,520Wh · 25kg
300Ah class · pre-order
60Ah · 900A CCA
View the SC-DC210 at SaltyCells or see all batteries on /shop. Stock on the DC210 is limited and arrives in batches from our supplier, so check availability and delivery time on the product page before you plan a trip around it.
Frequently Asked Questions
Yes, that is exactly what the DC210 is built for. It is a deep cycle design rated for repeated discharge, unlike a starter battery.
Sodium ion is widely considered a much lower fire risk than lithium because it uses no lithium or cobalt, and the manufacturer rates it for a wide temperature window. It is not fire proof, so like any battery it must be fused, wired correctly and secured. Read is a sodium ion battery safe for more.
Possibly, but not automatically. You need a charger or controller with adjustable voltage that can hold the datasheet limits. Do not rely on a lead acid or lithium preset without checking.
The manufacturer rates it at 6,000 cycles to 70% capacity at 0.2C. Real life depends on depth of discharge, temperature and charge settings. We back it with a 5 year warranty. See how long a sodium ion battery lasts.
At 25kg it sits in the same range as most 200Ah LiFePO4 batteries and well under half the weight of a 200Ah AGM.
The Bottom Line
A sodium ion deep cycle battery will not suit everyone yet. It is a newer chemistry, charging setup needs care, and stock is limited. But if you tour in extreme heat or cold, want long life with a lower fire risk than lithium, or are tired of dragging 60kg of AGM around, the DC210 deserves a place on your shortlist. Check the datasheet, check your charger, and ask us anything before you buy.
Browse the SaltyCells range on /shop, read why sodium ion, or contact us on hello@saltycells.com.au.