What you are buying is metalwork
A JKESS enclosure kit supplies the box and the hardware named on the selected package. Cells, inverter, charger, external breaker, site cabling, installation and commissioning sit outside that unless a written quotation puts them in.
An assembled capacity such as 15kWh describes what the box is designed to hold once compatible cells are fitted. It is not a statement that cells are included, and it is not a guarantee of usable energy, which depends on the cells, the voltage window, temperature and the BMS configuration.
The four measurements, and why the third one dominates
Two 280Ah prismatic cells from different production runs routinely differ by two or three millimetres in thickness. That difference is trivial per cell and decisive across a stack, because sixteen cells multiply it into something no enclosure tolerance absorbs.
- Width and depth at the widest point, measured over the wrap rather than the bare case
- Height over the terminal posts, which is what sets lid clearance, not the case height
- Stack length for the full cell count, plus the compression allowance the design expects and the thickness of any interleaved pads
- Terminal orientation and polarity sequence, which fixes busbar lengths and decides whether the arrangement can be mirrored to fit
Measure a sample cell yourself rather than working from a datasheet drawing. Take the stack figure from cells at rest, and leave room for the growth that LiFePO4 shows across its state-of-charge range and again over its life; a stack built with no allowance ends up pressing on the enclosure walls rather than on the pack.
Caster or rack: the question is where the mass ends up
Both formats build a 51.2V pack of similar capacity, so the choice is not about the battery. It is about how the loaded box is supported, moved and reached afterwards.
| Caster kit | 6U rack kit | |
|---|---|---|
| Empty enclosure | About 28kg, 835 × 400 × 280mm. | About 25kg, 715 × 472 × 270mm. |
| Who carries the load | The floor, through the wheels. Needs a level surface and something to stop it rolling once positioned. | The rails and the rack frame. Needs the rack static load rating checked against the loaded module, not the empty one. |
| Assembled system | 51.2V using compatible 280Ah to 320Ah cells, around 15kWh or 16kWh once built. | 51.2V rack module, around 15kWh once compatible cells are installed. |
| Environment | IP54 enclosure design, which tolerates dust and splashing but is not an outdoor rating. | IP20 indoor design. It expects a clean, dry, controlled space. |
| Getting it there | Rolls once assembled; still has to be carried to the room and up any step. | Has to be lifted to its rack position. Plan that before the cells go in, or plan to fit them in place. |
| Product page | Battery Kit with Caster | 6U Battery Kit |
Sixteen 280Ah cells weigh substantially more than either empty enclosure, so the assembled module is several times the listed figure. That number, not the empty weight, is what a rail rating and a lifting plan have to be checked against.
Enclosure only, or enclosure with BMS and display
The bundled package removes a sourcing step and a compatibility check, which is worth having if the BMS in it suits the pack. Take enclosure-only when you already have a board, or when the pack needs a specific series range, continuous current or inverter protocol that the bundle does not cover.
Either way the same three things have to be settled: series count against the pack, continuous current against the inverter rating rather than the battery capacity, and the communication the far-end device expects. The CAN and RS485 note explains why a shared interface name is not a shared protocol.
Leave room for the things that come later
The pack has to be maintained after it is built, and a box packed to its limit makes that expensive. Before committing, check that there is space to reach a busbar with a torque wrench, to route the sense harness away from the power path, to fit the fuse or breaker where it can be inspected, and to get a lid off without disturbing terminals.
Airflow matters even on a pack that is not aggressively cycled, because the balancer dissipates its correction as heat inside the same box. A sealed enclosure with a high balance current and no path for that heat runs warmer than the design assumed.
Shipping is a destination question for these kits
Enclosures are bulky and heavy in a way that boards and cables are not, so they follow a destination rule rather than the free worldwide shipping applied to the rest of the catalog. EU destinations are free. The United States, Southeast Asia, Japan, South Korea and the listed Middle East markets are a flat USD 150. Anywhere else needs a written freight quote and cannot be completed online.
Check that before configuring, not at the payment step, and remember that a cart containing any of the three kits follows the kit rule for everything in it.
Before ordering
- A sample cell measured, not a datasheet drawing read
- Stack length for the full count, with compression and growth allowance
- Height over terminals against the lid clearance
- Loaded mass, against the floor or the rail rating
- How the assembled module gets from the door to its final position
- Series count, continuous current and the inverter protocol
- Enclosure-only or bundled BMS and display
- Service access for busbars, fuse, harness and lid
- Destination and which shipping rule it falls under
- Who is assembling and commissioning it, and whether they have done one before
Compare the formats with the measurements in hand
The product pages carry the exact package contents, dimensions and included hardware.