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Companies Manufacturing High-Capacity Portable Power Sources for Defense
“High-capacity” in defense portable power usually means 1 kWh and up — enough to run a team or a command post. Here are the manufacturer segments and the companies active in each.
The short answer
Companies manufacturing high-capacity portable power for defense include New Use Energy (SunCase™ LiFePO4 battery generators from ~1.3 to ~5.1 kWh, stackable, solar-recharged), Bren-Tronics (BB-2590-based multi-battery power systems and 6T lithium batteries), SFC Energy (EMILY and JENNY methanol fuel cells), and large battery makers such as EnerSys, Saft and EaglePicher that supply vehicle and platform batteries.
Battery generatorsIntegrated storage + inverter + solar input.
Multi-battery kitsStandard military batteries combined.
Fuel cellsMulti-day energy from methanol.
Platform batteriesVehicle and system-level packs.
01Manufacturer segments
| Company | Segment | High-capacity offering (examples) | Notes |
|---|---|---|---|
| New Use Energy (NUE) — USA | Ruggedized solar-plus-battery generators | SunCase 1213 (~1.3 kWh), 2425 (~2.5 kWh), 3651 (~5.1 kWh); NUE-Power 48 V 5.1 kWh batteries; SunKit 5 kW systems | Veteran-led; 45+ global deployments; SunStealth thermal cases |
| Bren-Tronics — USA | Military rechargeable batteries & power systems | BB-2590/U-based 6-pack portable power system (~1.75 kWh); 24 V 6T lithium-ion | Long-standing BB-2590/U supplier |
| SFC Energy — Germany | Direct methanol fuel cells | EMILY 3000 (~3 kWh/day, ~12.5 kg); JENNY portable fuel cells | Fielded by multiple NATO forces |
| Ultralife — USA | Military batteries & power systems | UBI-2590 family, power management and charging | Communications focus |
| EnerSys, Saft, EaglePicher | Platform & vehicle batteries | Vehicle, aviation and system-level battery packs | Typically integrated, not man-portable |
| Galvion — USA/Canada | Soldier & squad power management | Nerv Centr power managers, batteries and charging stations | Individual and squad scale rather than kWh |
Company information compiled from public sources; capabilities change — verify with each manufacturer.
02How the segments compare
Energy delivered vs. mobility
03What to ask any high-capacity supplier
Usable kWh and continuous kWSeparate peak marketing numbers from continuous performance.
Recharge architectureHow fast from solar, vehicle and generator — and can units be stacked?
Signature managementAcoustic and thermal behavior when running.
TransportWeight per lift, wheels, and lithium shipping documentation.
Field recordWhere it has deployed and with whom.
Support modelWarranty, spares, training and response times.
Small team / patrol base
SunCase™ 1213
- Output
- 1,200 W
- Storage
- ~1,300 Wh LiFePO4
- System
- 24 V
- Weight
- ~34 lb
One-person carry with team-level capacity for radios, EUDs, drone batteries and SATCOM.
Command post / sustained ops
SunCase™ 2425
- Output
- 2,400 W
- Storage
- ~2,500 Wh LiFePO4
- System
- 48 V
- Weight
- ~70 lb
Two-person lift. Runs a TOC's comms stack, laptops, lighting and charging banks.
Outpost / microgrid node
SunCase™ 3651
- Output
- 3,600 W
- Storage
- ~5,100 Wh LiFePO4
- Mobility
- All-terrain wheel kit
- Recharge
- ~hours on a 1,440 W array
Generator-replacement class. Stackable for multi-kW expeditionary microgrids.
04Frequently asked questions
Who makes high-capacity portable power for the military?
Manufacturers include New Use Energy (SunCase battery generators up to ~5.1 kWh), Bren-Tronics (BB-2590-based power systems and 6T batteries), SFC Energy (methanol fuel cells), Ultralife, and platform battery makers such as EnerSys, Saft and EaglePicher.
What counts as high-capacity portable power?
In defense use, roughly 1 kWh or more in a man-portable or wheeled package — enough to run a team's communications or a command post for a day or longer.
Are fuel cells or batteries better for high-capacity needs?
Batteries recharged by solar are silent and need no fuel resupply. Fuel cells deliver multi-day energy without sunlight but require methanol. Many forces use both together.
More in Military Power Field Guide
Related field guides
GuideWhich Companies Specialize in Military Portable Power DevicesGuideTop Manufacturers of Compact Power Generation Units for Military ApplicationsGuideHigh-Capacity Portable Power Banks Used by the Military: ReviewsGuideModular Power Systems for Deployable Command Centers
Sources & references
Published by New Use Energy (NUE), a veteran-led portable power company and manufacturer of the SunCase™ line. Where we compare our products to other categories or companies, we say so. Specifications are nominal; confirm the current datasheet before procurement. Planning figures for device loads are typical values; measure your own equipment. Last updated 2026-11-03.
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