Compare Residential Batteries
Comparing 1 product
Fortress Power
eVault 18.5Performance
Usable Capacity
18.5kWh
Continuous Power
5kW
Peak Power
10kW
Max System Size
—
Round-Trip Efficiency
98%
Cycle Life
8,000
Depth of Discharge
100%
Chemistry
LFP
Physical
Weight
520lbs
Height
42.2in
Width
20.3in
Depth
20.3in
IP Rating
IP55
Operating Temp
-20°C to 60°C (discharge) / 0°C to 45°C (charge)
System
Coupling
—
Integrated Inverter
No
Grid-Forming
No
Indoor / Outdoor
Indoor
Certifications
UL 1973
Certified
UL 9540
Certified
UL 9540A
Not Certified
IEC 62619
Not Certified
Commercial
Warranty
10
Warranty Throughput
—
Est. Price
—
Software Platform
Fortress App
Manufacturing Location
Assembled USA
Key Differentiator
Largest single-unit LFP battery (18.5kWh); off-grid specialist; 48V architecture; popular w/ Sol-Ark
Data Quality
Data Confidence
Medium