Thermal-runaway resistant
LiFePO₄ chemistry stays stable well beyond typical operating temperatures — no fires, no drama.
LiFePO₄ · 48V · Rack-Ark
Power that outlives the grid.
The RackArk US2000, US3000 & US5000 — modular lithium storage engineered for solar homes, off-grid cabins, and businesses that refuse to go dark.
- 0Cycles @ 80% DoD
- 0Year warranty*
- 0Batteries stackable
48VNominal
LiFePO₄Chemistry
IP20Rated
Compatiable Inverters
— Portable power
Grid-free power.
Compact power stations for adventures, work sites, and home backup. LiFePO4 chemistry, 5-year warranty, dispatched from our UK warehouse.
Camping & outdoors
Tent lights, phones, coolers, drones
Home backup
Router, Wi-Fi, lights during outages
Work sites
Power tools, laptops, LED lights
Road trips
Campervans, RVs, weekend escapes
Chemistry that refuses to compromise.
Lithium Iron Phosphate is the gold standard for stationary storage. Safer than NMC, longer-lived than lead-acid, lighter than both.
95% usable capacity
Deep discharge without cell damage. Use almost every watt-hour you paid for — every cycle, for years.
Stack up to 16 in parallel
Start with one. Grow to 74+ kWh as your load grows. Plug-and-play CAN-bus makes expansion painless.
Cobalt-free & cleaner
No cobalt, no nickel. A gentler footprint and a longer service life than the lithium you've been sold.
6000+ cycles
That's one full charge-discharge every single day for over 16 years. Still above 80% capacity at the end.
Built-in BMS
Every Litrium battery ships with an integrated Battery Management System — cell balancing, SoC, temp, done.
Three batteries. One uncompromising standard.
RackArk-2000
Lithium · LiFePO₄ · 48V
- Capacity2.4 kWh
- Voltage48 V
- Cycles6000+
- Weight24Kg
RackArk-5000
Lithium · LiFePO₄ · 48V
- Capacity4.8 kWh
- Voltage48 V
- Cycles6000+
- Weight40 kg
RackArk-3000
Lithium · LiFePO₄ · 48V
- Capacity3.6 kWh
- Voltage48 V
- Cycles6000+
- Weight32 kg
Pick the right pack for your system.
Every Litrium battery shares the same DNA — LiFePO₄, 48V nominal, CAN-bus ready. The difference is capacity and compactness.
| Spec | RackArk-2000Compact | RackArk-5000Workhorse | RackArk-3000Next-gen |
|---|---|---|---|
| Nominal capacity | 2.4 kWh | 4.8 kWh | 3.6 kWh |
| Nominal voltage | 48 V | 48 V | 48 V |
| Usable DoD | 95% | 95% | 95% |
| Cycle life (80% DoD) | 6000+ | 6000+ | 6000+ |
| Charge / discharge | 89 A / 200 A peak | 89 A / 200 A peak | 89 A / 200 A peak |
| Max parallel units | 16 | 16 | 15 |
| Dimensions (mm) | 442×420×133 | 442×420×161 | 442×420×161 |
| Weight | 24 kg | 40 kg | 32 kg |
| Communication | CAN / RS485 | CAN / RS485 | CAN / RS485 |
| Certifications | IEC · UN38.3 | IEC · UN38.3 · CE | IEC · UN38.3 · CE |
| Warranty | 10 yr* | 10 yr* | 10 yr* |
* Warranty subject to installation and usage terms. See documentation for full details.
Limited-time offer
Buy 3 1 Batteries Free
Order any 3 Litrium batteries (RackArk-2000, RackArk-3000 or RackArk-5000 — mix or match) and we add a 4th to the crate at zero cost. Perfect moment to scale your bank to 20+ kWh.
Claim this offer
Use code
LITRIUM4
- Free shipping on bundle
- 10-year warranty on all 4 units
- Mix any models you need
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— How it works
Solar in. Lithium stored. Clean power out.
A Litrium setup plugs into any modern hybrid or off-grid inverter. Panels charge the pack during the day. The battery discharges through the night — or during outages. The cycle repeats for decades.
-
01
Generate with solar
PV panels on the roof produce DC during daylight hours. A hybrid inverter manages where that energy goes.
-
02
Store in Litrium
Surplus solar charges the LiFePO₄ pack. The built-in BMS balances every cell and talks to your inverter over CAN-bus.
-
03
Power the home
At night or during outages, the battery discharges cleanly to your loads — silent, instant, grid-independent.
-
04
Scale on your terms
Start with one battery. Add another next year. Stack up to 15 in parallel for whole-business backup.
Installed in homes, farms & businesses.
Quiet power. Loud reviews.
Three US5000s in parallel. My home has been off the grid for 14 months. Flawless. The BMS talks to my Deye inverter like they were built together.
G
George
Home owner
Switched our farm from diesel generators to a six-battery Litrium bank. Noise gone. Fuel bills gone. Whole thing paid itself back faster than I expected.
E
Eleanor P.
Farm operator
I install solar for a living. Litrium is the only battery I stock now. Clients understand the warranty. The packs wake up and talk. That's it.
J
James T.
Solar installer
— FAQ
Still have questions?
The quick answers. For anything else, our team is one message away — we reply within a day.
Talk to an expertWhich inverters work with Litrium batteries?
RackArk-2000, RackArk-3000 and RackArk-5000 use CAN-bus protocol, which is natively supported by Victron, Deye/SunSynk, Growatt, Goodwe, SolaX, Voltronic, Solis and most modern hybrid inverters. We'll confirm compatibility before shipping.
How long do these batteries last?
Rated for 6000+ cycles at 80% depth of discharge — roughly 16 years of daily cycling while retaining 80% of original capacity. Covered by a 10-year warranty.
Can I mix RackArk-2000 and RackArk-5000 in the same bank?
We don't recommend it. For optimal BMS communication and cell balancing, stick to identical models in parallel. You can run them as separate banks on the same inverter if needed.
Do you ship internationally?
No we only ship to United kingdom. Batteries ship via certified lithium-compliant freight (UN38.3, IATA). Lead times is about 5-10 days within UK
Do I need a professional installer?
For a full solar + battery system: yes, use a certified electrician. Litrium batteries themselves are plug-and-play on the DC side, but AC wiring to your home must follow local codes.
What's included in the box?
The battery module, power & communication cables (DC, CAN, RS485), rack-mount ears, and a quick-start manual. Rack cabinets and inter-battery cables are sold separately
Ready when you are
Let's build your storage.
Tell us your load, your location, and the inverter you have (or are picking). We'll spec the right battery bank and quote it within 24 hours.