SunCase 605 Silent Watch Fuel Cell Kit — with SFC EMILY 3000

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The SunCase™ 605 Silent Watch Fuel Cell Kit pairs New Use Energy's 537Wh LiFePO4 SunCase™ 605 power station with the SFC EMILY 3000 military-ruggedized fuel cell. The SunCase delivers up to 600W of pure sine wave power on demand. The EMILY 3000 puts back up to 3,000Wh per day — near-silent, low-signature, sun or no sun. Battery for the peaks. Fuel cell for the long haul.

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SFC EMILY 3000 fuel cell powering a forward drone launch site in open terrain, with a fixed-wing UAS in flight and a portable solar blanket deployed

NUE × SFC Energy · Hybrid silent watch power

Silent.Unseen.Unbroken.

SunCase™ 605 + SFC EMILY 3000 Silent Watch Fuel Cell Kit

A 600W LiFePO4 power station paired with a military-ruggedized methanol fuel cell. Days of continuous mission power — no generator roar, no idling engine, no waiting on the sun.

600WPure sine wave AC output
3kWhRecharge energy per day
48dBFuel cell at 1 m — diesel gen: 80–100 dB
3–5daysUnattended per 10 L cartridge
45lbComplete system weight
Chapter 01 · The problem

Every generator
is a beacon.

Out here, sound carries and heat glows. A diesel generator running at 80–100 dB, with 450 °C exhaust, tells anyone within range exactly where you are.

Shut it down and the radios, sensors and drones go dark. For decades, that's been the trade: power or concealment. Pick one.

The SunCase™ 605 + EMILY 3000 ends the trade.

Sound at 1 meter

80–100 dB
48 dB

Exhaust heat

450–600 °C
30–60 °C

Unattended run per 10 L of fuel

2–3 hrs
3–5 days

Unit weight

150 kg
12.5 kg

Source: SFC Energy, EMILY 3000 vs. typical diesel generator. Sound measured at 1 m; runtime per 10 L canister.

Soldier operating a rugged laptop inside a military vehicle cab, with on-board fuel cell power distribution running mission electronics while the engine is off
Chapter 02 · Engine off

0300.
Engine off.
Eyes on.

The engine has been cold for hours. The network hasn't blinked.

Laptops, radios and sensors run from the SunCase™ 605's clean pure sine wave output. Behind it, the EMILY 3000 converts methanol and air into a steady trickle of charge — at 48 dB, quieter than a normal conversation. No idling. No exhaust plume. No reason for anyone to look your way.

On-board silent watch · engine-off power for C2, comms and ISR

The system

Battery for the peaks.
Fuel cell for the long haul.

What is the SunCase™ 605 + EMILY 3000 kit? It's a hybrid off-grid power system from New Use Energy. The SunCase™ 605 — a 537Wh, 600W lithium iron phosphate (LiFePO4) power station — carries every load and surge. The SFC EMILY 3000, a military-ruggedized direct methanol fuel cell, recharges it with up to 3,000Wh per day.

The result: near-silent, low-signature power for silent watch, ISR, tactical communications, drone operations and disaster response — for days on a single fuel cartridge, day or night, in any weather.

How the SFC EMILY 3000 recharges the SunCase 605: air and an EFOY M10 methanol cartridge feed the fuel cell, which sends power to the SunCase; exhaust is only waste heat, water vapor and trace CO2
Air + methanol in · power out · water vapor, low heat and trace CO₂ exhaust
01 / LOAD

SunCase™ 605 carries the mission

Up to 600W of pure sine wave AC from a 537Wh LiFePO4 battery. It absorbs every surge — drone chargers, radios, laptops — with clean power that won't create RF interference.

02 / RECHARGE

EMILY 3000 refills it, silently

A steady 125W of DC charge, up to 3 kWh every 24 hours. Any load averaging 125W or less runs as long as the fuel lasts — about 88 hours per 10 L cartridge at full output.

03 / EXTEND

Add solar or a second cartridge

The SunCase™ 605's 400W solar charge controller harvests sunlight when it's there. SFC's DuoCartSwitch connects two cartridges to roughly double unattended runtime.

SFC EMILY 3000 fuel cell and 10 liter methanol cartridge mounted in the rear cargo bed of an armored military vehicle
Vehicle-mounted · EMILY 3000 and fuel cartridge ride in the cargo bed, approved for operation in motor vehicles
Chapter 03 · The long watch

Hours become days.

Here's how a 100-watt observation post plays out on a single 10-liter cartridge.

  1. Position establishedSunCase™ 605 full. EMILY 3000 online. Radios, sensor and laptop up.
  2. Where a battery alone goes dark537Wh is spent. Without a fuel cell, you're rotating batteries or starting a generator.
  3. Day one. Nothing to hear.Fuel cell holding the load at 48 dB. Exhaust: 30–60 °C. No resupply.
  4. Day three. Still running.No refueling run, no engine start, no change in signature.
  5. Swap one cartridge. Keep watching.About 4.4 days in. Add a DuoCartSwitch and second cartridge to roughly double it.

Illustrative scenario at a 100W continuous average load with one 10 L cartridge. Real-world results vary with temperature, conversion losses and configuration.

Run your numbers

How long will yours run?

Set your average mission load and see the difference a fuel cell makes.

Average load100 W
Example loads
Fuel cartridges (10 L)
SunCase™ 605 alone4.8 hrs
With EMILY 30004.4 days
≈ 22× longer runtime
Approximate runtimes at continuous average load with one 10 L cartridge. Real-world results vary with temperature, conversion losses and configuration. Loads above 125W draw down the battery faster than the fuel cell can recharge it.
Average loadSunCase™ 605 aloneWith EMILY 3000
50W~10 hours~9 days
100W~5 hours~4.5 days
125W~4 hours~3.5 days
Where it deploys

Built for the long watch.

01

Silent watch & ISR

Observation posts, sensor networks and perimeter surveillance that must stay concealed for days.

02

Tactical communications

Radios, SATCOM terminals and C4ISR nodes on clean, RF-quiet pure sine wave power.

03

Drone & counter-UAS

Continuous battery charging for sUAS, goggles and ground control stations at the edge.

04

Vehicle-based missions

Engine-off power for command, emergency and multipurpose vehicles. No idling, no fuel burn.

05

Disaster response

Command posts, comms and lighting when the grid is down and the sky is overcast.

06

Remote sites & telemetry

Unattended monitoring, border and field stations far from fuel resupply.

SunCase 605 Silent Watch Fuel Cell Kit: EFOY M5 methanol cartridge, SFC EMILY 3000 fuel cell and NUE SunCase 605 power station
The kit

Two units.
One mission.

  • SunCase™ 605 537Wh LiFePO4 · 600W pure sine · 17.6 lb
  • SFC EMILY 3000 125W DMFC · 3 kWh/day · 27.6 lb
  • SFC methanol cartridge M5 / M10 / M28 · ~88 hrs per 10 L at full output

SunCase™ 605 Power Station

Inverter600W pure sine wave (120V) · 700W (230V models)
Capacity537Wh
ChemistryLithium iron phosphate (LiFePO4)
Cycle life6,000 cycles at 80% depth of discharge
DC nominal voltage24V
Solar / DC input13–100V, 400W max
AC chargingBuilt-in charger, max 20A charge rate
CaseFire-retardant thermoplastic, IP55
Operating temp32–131°F (0–55°C)
Weight17.6 lb (8 kg)
Dimensions15 × 11 × 8 in (36 × 27 × 19 cm)
CertificationsUN38.3, CE, RoHS (cells), UL1973 (cells), UL 489 listed breaker
Warranty24-month limited manufacturer's warranty

SFC EMILY 3000 Fuel Cell

TypeDirect methanol fuel cell (DMFC), military-ruggedized
Rated power125W
Energy per day3,000Wh
Output voltage12V / 24V DC
Fuel consumption0.9 L per kWh · under 100 ml per hour
Runtime (10 L)88 hours at 3,000Wh/day
Noise48 dB at 1 m
Fuel cartridgesSFC M5 / M10 / M28
Operating temp-13°F to 122°F (-25°C to +50°C)
Weight27.6 lb (12.5 kg)
Dimensions18.7 × 8.1 × 11.3 in (476 × 206 × 286 mm)
Vehicle useApproved for operation in motor vehicles
75,000+ SFC fuel cells fieldedNUE · 45+ global deploymentsVeteran-led
Field questions

Straight answers.

Still have a question? Talk to a New Use Energy portable power expert at 1-844-941-3476.

What is a silent watch power system?

A silent watch system powers mission equipment — radios, sensors, optics, computers — without running a vehicle engine or generator. It keeps noise, heat and visual signatures low so a position stays concealed. The SunCase™ 605 + EMILY 3000 does this with a LiFePO4 battery for peak loads and a 48 dB fuel cell for continuous recharge.

Does the SunCase™ 605 + EMILY 3000 need sunlight?

No. The EMILY 3000 recharges the SunCase™ 605 day or night, in any weather, from methanol fuel cartridges. Solar is a bonus: the SunCase™ 605's 400W solar input lets you add panels when the sun is available.

How long will the kit run on one fuel cartridge?

At a 100W average load, roughly 4.5 days on one 10 L cartridge, versus about 5 hours on the SunCase™ 605 alone. At 50W, about 9 days. Adding a second cartridge with SFC's DuoCartSwitch roughly doubles that.

How long does the EMILY 3000 take to recharge the SunCase™ 605?

About 4 to 5 hours from empty at the fuel cell's full 125W output, depending on conditions.

How quiet is the EMILY 3000 compared to a generator?

The EMILY 3000 produces about 48 dB at 1 meter — quieter than normal conversation. A typical diesel generator produces 80–100 dB. Its exhaust runs at 30–60 °C versus 450–600 °C for a diesel generator, sharply reducing thermal signature.

Can I run it inside a vehicle or shelter?

Yes. SFC fuel cells are approved for operation in motor vehicles. Install the EMILY 3000 where it has adequate supply air and a path for exhaust air and waste heat.

Does it work in extreme cold?

The EMILY 3000 operates down to -13°F (-25°C). The SunCase™ 605 operates from 32°F (0°C) up, so in freezing conditions keep it inside the vehicle or shelter while the fuel cell works outside or alongside.

What does the EMILY 3000 emit?

Only water vapor, low-temperature waste heat and a little CO₂ — at full power, roughly what a person exhales while exercising. No diesel smoke and no engine exhaust.

Is the system maintenance-free?

No system is. Both units need periodic inspection and care, but with no engine, no oil and no spark plugs, upkeep is a fraction of a generator's.

Who should buy this kit?

Military units, special operations, government agencies, emergency managers and remote-site operators who need reliable power for days at a time without generator noise, refueling runs or dependence on the weather.

Your next mission

Stay on station.
Stay unseen.

Tell us the mission. A New Use Energy portable power expert will size the system, confirm fuel logistics and send a quote — including government, volume and international 230V configurations.

1-844-941-3476sales@newuseenergy.com

Response within one business day. Your information is never shared.