Guardian E2.1
48kWh/ 18kW
Complete Energy Storage System with SunFusion Batteries and Sol-Ark 18K Inverters
⚡ INDUSTRY-LEADING PERFORMANCE ⚡
Featuring the Sol-Ark 18K - The Most Powerful & Versatile Hybrid Inverter Available
Unmatched 36kW Surge Capacity • 32.4kW PV Support • True Whole-Home Backup
NO SEPARATION REQUIREMENT
Due to construction of cabinets and battery modules using 5052-H32 aerospace aluminum
Melting point: 1,125-1,200°F • UL 9540 Compliant • Fire Safety Certified
Technical Specifications
Cabinet Specifications
| Dimensions | 82" × 17" × 33" |
| Weight | 1,049 lbs |
| Cabinet Type | Aluminum 5052 |
| Cabinet Finish | Gun Metal Finish |
| Cooling System | AC Infinity 200CFM 38db |
| Security | Lockable Door |
| Enclosure Rating | NEMA Type 3R |
Battery Module Specifications
| Battery Type | Hithium 314Ah ECHO 3.0 |
| Module Capacity | 16 kWh |
| Cell Type | Lithium Iron Prismatic Cells |
| Nominal Voltage | 51.2V DC |
| BMS | 48V Advanced BMS |
| Protection | RSD Compliant Each Module |
| Battery Includes | 16 Cells, 250A Breaker, BMS |
System Configuration
| Total Capacity | 48 kWh (3 × 16 kWh) |
| Off-Grid Power | 18 kW |
| Cable Type | 1/0 AWG Arctic Ultraflex |
| Max Current Rating | 264A @ 40°C (104°F) |
| DC Protection | 250A Battery Breaker |
| Rapid Shutdown | 5-15 seconds |
Operating Parameters
| Operating Temperature | -25°C to 55°C |
| Battery Voltage Range | 40-58V DC |
| Charge Current | 250A Continuous |
| Charging Efficiency | 97.0% |
| Parallel Stacking | Yes |
| Communication | WiFi, CanBus, RS485 |
Sol-Ark® 18K - The #1 Whole Home System
Maximum Power. Unmatched Reliability. Industry-Leading Performance.
✓ Unprecedented Surge Capacity
• 36kW surge for 10 seconds
• Starts any HVAC system or motor without issue
✓ Maximum Solar Support
• 32.4kW PV input capacity
• 28.8kW usable PV power
• Plus 19.2kW AC-coupled input
✓ True Whole-Home Backup
• 18kW continuous power on/off grid
• Powers entire home without sacrifice
✓ Grid Down Generation
• Continue generating power during outages
• No fuel costs or generator maintenance
✓ Military-Grade Reliability
• 2x military-grade standards
• Protection through lightning strikes
✓ DC to DC Architecture
• Maximum efficiency design
• Industry-best round-trip efficiency
MOST POWER
18kW Continuous
36kW Surge
200A Pass-Through
Solar Options
6X DC Ports
3X MPPT
32.4kW PV Input
Battery Choice
275A Charger
2X 48V Ports
UL9540 Options
Grid Control
Time-of-Day
5ms Transfer
VPP Ready
EV/Gen Ready
Two-Wire Start
Auto EV Shed
Smart Load
Sol-Ark 18K Inverter Specifications
| Continuous AC Power | 18 kW (On/Off-Grid) |
| Surge Power (10 sec) | 36 kW |
| Pass-Through Power | 48 kW @ 200A L-L |
| Load Power (Off-Grid) | 18 kW @ 150A L-L |
| Max PV Input Power | 32.4 kW |
| Usable PV Power | 28.8 kW |
| CEC Efficiency | 96.5% (Peak 97.5%) |
| MPPT Channels | 3 Independent |
| MPPT Voltage Range | 125-425V |
| Max DC Voltage | 500V @ 32A |
Inverter Features
| Grid Response Time | 5ms |
| Power Factor | +0.9 to 1.0 |
| Frequency | 60/50 Hz |
| Sell Back Modes | Limited or Full Grid-Tied |
| AC Coupled Input | 19.2 kW |
| Idle Consumption | 95W (No Load) |
| Design Type | Transformerless DC |
| Connections | 120/240/208V Split Phase |
| Dimensions | 34" × 18.3" × 11.1" |
| Weight | 137 lbs |
Protection Features
| PV DC Disconnect | Integrated (NEC 240.15) | Ground Fault Detection | Yes (NEC 690.5) |
| Arc Fault Detection | Yes (690.11/UL1699B) | Lightning Protection | PV Input Protected |
| EMP Hardened | Optional MIL-STD-461G | Battery Protection | Breaker/Disconnect |
Why Sol-Ark 18K is the #1 Choice
🏆 Industry Leader
Most powerful hybrid inverter with unmatched 36kW surge capacity
⚡ Maximum Solar
32.4kW PV support - more than any competitor
🏠 True Whole-Home
18kW continuous power handles any residential load
Certifications & Compliance
PCS Compliant • UL9540 B Compliant • Conforms to Aggregate Sizing under 600kWh
Each Battery Module is under 20kWh with Fire Safety • Independently Tested June 2018