Wilson Safe Company
The Diplomat Series
The highest-capacity and most diverse range of certified lithium-ion battery safes. Built to contain thermal runaway, suppress fire and reduce explosion risk, and an excellent deterrent to burglary and theft.
Compare models
Six sizes, one standard of protection
Pick the model that fits your batteries today, with room to grow.
| Model |  |  |  |  |  |  |
|---|---|---|---|---|---|---|
| Charging points | 6 | 12 | 18 | 24 | 30 | 40 |
| Shelves | 0 | 1 | 2 | 3 | 4 | 4 |
| Max battery capacity (kWh) | 2.5 | 5.0 | 7.5 | 10.0 | 12.5 | 22.5 |
| Capacity per shelf (kWh) | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 4.5 |
| Outside size, inches (H × W × D) | 34 × 27 × 28 | 39 × 27 × 28 | 54.5 × 27 × 28 | 63 × 27 × 28 | 75 × 27 × 28 | 75 × 44 × 28 |
| Inside size, inches (H × W × D) | 18 × 20 × 16 | 23 × 20 × 16 | 39 × 20 × 16 | 47 × 20 × 16 | 59 × 20 × 16 | 59 × 37 × 16 |
| Weight, approx. (lb) | 408 | 470 | 688 | 855 | 917 | 1,345 |
| Cut sheet | Download PDF | Download PDF | Download PDF | Download PDF | Download PDF | Download PDF |
| Quote | Request a quote | Request a quote | Request a quote | Request a quote | Request a quote | Request a quote |
Swipe sideways to compare all six models.
Outside height includes the 3.9 in plinth and 4.9 in control box. Outside depth includes 2.4 in for the ventilation unit. Color: Ivory (RAL 9002). Shown with the optional alarm light. Weights are approximate.
Built in
Advanced safety features
Every Diplomat safe is engineered to protect your people and your facility while your batteries charge.
Fire alarm
Smoke and heat detectors give early warning of a fire inside the safe.
122°F alarm
Sounds when the internal temperature signals thermal runaway.
Door left open alarm
Alerts you if the door stays open for more than one minute.
Fire-resistant battery shelves
Help keep thermal runaway from spreading from shelf to shelf.
Automatic fire extinguisher
The extinguishing agent is released automatically in response to heat or flame.
Emergency shutdown
Power to the charging system is cut automatically if a fire occurs.
Toxic gas venting
A ventilation port lets toxic gases be piped safely outside.
Building fire system link
Connects to your building’s central fire alarm and suppression system.
Control display panel
A control panel on the safe shows system status.
Tested and certified
Certified for safe battery storage
Diplomat safes have undergone rigorous physical testing under the supervision of ECB·S, a globally recognized European certification body renowned for its reliability and expertise in safety compliance. They are also certified to meet VDMA 24994, the standard created in 2024 as a new benchmark for the safe storage of lithium-ion batteries.
Options
Customize your safe
Extra shelf
2 in high, 19 in wide, 16 in deep, about 16 lb. Fits the 1820-BS through 5920-BS. The 5937DD-BS shelf is 36.5 in wide and about 28 lb.
Power strip
Choose a 4, 6 or 8 socket power distribution unit.
Fire extinguisher
Add an extinguisher for extra suppression capacity.
Alarm light
A visible beacon that signals an alarm from across the room.
Ready to talk
Get the cut sheet or a quote
The cut sheet covers every Diplomat model. Tell us what you charge and we will recommend the right size.