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FIRMAN · Power station

E201002

4,000 starting watts and 2,000 running watts with battery operation.

2,000W running4,000W starting1,040Wh capacityBattery

$1,699.99

Direct price snapshot
FIRMAN Zero-E System plus Expansion Battery
Official product image: FIRMAN

Core specifications, simplified.

01 · Stored power

Up to 4,000 starting watts

Battery2,000W running

4,000W starting

02 · Runtime & operation

Manufacturer runtime

Runtime varies by load

Operating volume

Silent battery power

Fuel tank

No combustion fuel

03 · Size & ownership

42.7

Unit weight

16x10.6x11.2

Unit dimensions

Warranty
3-year warranty
Certifications
CARB · CETL · EPA · NOM
Availability
Sold out
04 · Controls & safety

Starting

Electric

Power quality

See specifications

Safety

Low-oil status listed below

Electrical

See full specifications

100W × USB-C PD Watts · 15.5W*4 × USB-A 5V 3.1A Watts · 100W*2 × USB-C PD Watts · Yes × USB Output Switch · Yes × USB Indicator · 4 × USB-A 5V 3.1A · 1 × USB-C PD Out 100W · 1 × USB-C PD In&Out 100W · 1 × TT-30R AC Output (120V 30A) · 4 × 5-20R AC Output (120V 20A)

These manufacturer images may include dimensions, control-panel callouts, included equipment, safety features, and common use cases. Scroll sideways to view the complete set available for this model.

FIRMAN E201002 product view
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Every official field, organized.

The technical fields below come from FIRMAN’s model-specific specification file. Product photos and infographics come from the official product gallery. Confirm current documentation before purchase.

Outdoor use only for combustion models. Never operate a fuel-burning generator inside a home, garage, shed, or other enclosed space. Follow FIRMAN’s manual and use an approved transfer method for home connections.

Manufacturer overview

The FIRMAN Zero-E Energy Storage System delivers clean, emission-free power wherever you need it—perfect for homes, apartments, RVs, and vehicles. With 4,000 starting watts and 2,000 running watts, the Zero-E can power small to medium appliances, electronics, and essential devices. Featuring advanced EPS (Emergency Power Supply) pass-through technology, the Zero-E automatically backs up your fridge, modem, sump pump, or security system during an outage—switching to battery power in milliseconds. Its Lithium Iron Phosphate battery ensures safe operation, 4,000+ charge cycles, and long-term reliability. Need more runtime? Easily expand with slide-on Zero-E batteries—up to 10 add-ons for a total of 11,440Wh capacity. Power up your devices with six 120V outlets, a TT-30R RV outlet, four USB-A ports, two 100W USB-C ports, a 12V cigarette outlet, a 12V DC port, and a Qi wireless charger. Recharge the Zero-E your way: from a standard wall outlet, your vehicle’s 12V socket, or up to 400W of solar input. Whether you're preparing for emergencies or living off-grid, the Zero-E is your all-in-one portable power solution.

Certifications

cETLus (UL2743)
Yes
UN38.3
Yes
FCC SDOC
Yes
FCC ID
Yes
IC ID
No
DOE
Yes
CEC
Yes
SDS
Yes
ROHS
Yes

Main Unit

Rated Capacity
1040Wh
Cycle Life
>4000 complete cycles to 80% capacity
Storage Temperature
-20 ~ 40 °C (-4 ~104 °F)
Discharging Temperature
-20 ~ 40 °C (-4 ~104 °F)
Charging Temperature
0 ~ 40 °C (32 ~104 °F)
Scalability
Up to 11.4kWh
Shelf Life
12 Month

Input

AC Charging Watts
1800W
MPPT Watts
400W
Car Charging Watts
240W
USB-C PD Watts
100W

Output

AC Rated Output Watts
2000W
AC Peak Watts
4000W
DC 12V Output Watts
120W
USB-A 5V 3.1A Watts
15.5W*4
USB-C PD Watts
100W*2
Wireless Charger Watts
10W

Control Panel

Multifunction LCD Display
Yes
Main Power Switch
Yes
USB Output Switch
Yes
DC Output Switch
Yes
AC Output Switch
Yes
USB Indicator
Yes
Wireless Indicator
Yes
DC Indicator
Yes
AC Indicator
Yes
USB-A 5V 3.1A
4
USB-C PD Out 100W
1
USB-C PD In&Out 100W
1
Wireless Charger (9V 1.1A)
1
5-15P AC Input (120V 15A)
1
EC5 DC Input (11-70V Max10A)
1
Parallel Port 120V 20A
Yes
TT-30R AC Output (120V 30A)
1
5-20R AC Output (120V 20A)
4
DC5521 Output (12V 10A)
1
Cigarette Lighter 12V Output
Yes
Input 15A Circuit Breaker
Yes
Output 20A Circuit Breaker
Yes
Output 30A Circuit Breaker
Yes
Expansion Pack Male Connector
Yes
Input Cover
Yes
Output Cover
Yes

Frame

Handle
Yes
Color
Black
Wireless Panel Material
Rubber

Battery Pack&BMS

Battery Cell Spec
LI-FUN 25Ah 3.2V
Battery Type
LFP
Pack Configuration
13S1P
Cooling
NA
Rated Charging Current
35A
Rated Discharging Current
65A
Overcurrent Protection
Yes
Temperature Protection
Yes
Short Circuit Protection
Yes
Balance Management
Yes

Inverter

Bidirectional Inverter
Yes
EPS (≤20ms)
Yes
Parallel
Yes
Constance Power Output
Yes
Input Voltage Protection
Yes
Input Frequency Protection
Yes
Input Over Current Protection
Yes
Output Over Current Protection
Yes
Output Short Circuit Protection
Yes
Temperature Protection
Yes
Fan Cooling
Yes

Packaging

UPC Code
840876105009
Carton Dimensions
19.7x15x16.5
Carton Weight
47.6
Product Dimensions
16x10.6x11.2
Product Weight
42.7
  • Camping
  • Home Projects
  • Power Outage
  • Tailgate
  • Work
  • Battery-powered operation
  • Electric start

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Official sources:FIRMAN product pageTechnical specificationsAll FIRMAN generatorsVerified September 15, 2026