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SMA Sunny Island SI 4548-US 4500W 48V Off-Grid Inverter, Smartformer Compatible, 96% Maximum Efficiency

The new SMA Sunny Island 4548-US and 6048-US inverters are based on the proven off-grid technology in the Sunny Island 5048-US but now feature 20 percent more power output. A maximum efficiency of 96 percent ensures peak production, which results in reduced diesel usage and makes a smaller dimensioning of the PV array possible. The new Sunny Island with two different power ratings enable more flexible system sizing. And, with multicluster technology, up to 12 Sunny Islands can be integrated into off-grid power systems up 100 kW in size.

Efficient

• Max. efficiency: 96 percent
• CEC efficiency: 94 % and 94.5 %
• State of Charge Calculation
• Intelligent battery management for longer battery lifespan

Simple

• Easy commissioning with the “Quick Configuration Guide”
• Complete off-grid management
• Excellent for grid-tied battery back up

Flexible

• For systems from 2 kW to 100 kW
• Single, 120/240 V split-phase and three-phase operation, connectable in parallel and modularly expandable

Durable

• Extreme overload capacity
• OptiCool active temperature management system
• 5-year standard warranty

Specifications

Output data (loads)
Rated Grid Voltage/AC Voltage Range	120 V/ 105 V - 132 V
Rated Grid Frequency/Frequency Range	60 Hz/ 55 Hz – 65 Hz
AC power at 25 °C / 40 °C for 3 hours	5000 W / 4000 W
Rated power	4500 W
Rated current	37.5 A
Max. current (60 ms)	180 A
Total harmonic factor output voltage	3%
Power factor with rated power	–1 to +1
Input data (PV array or grid)
Rated input voltage/AC input voltage range	120 V /80 V – 150 V
Rated input frequency/ allowable range	60 Hz / 54 Hz – 66 Hz
Max. AC input current /adjustable	56 A /0 A – 56 A
Max. AC input power	6.7 kW
Battery DC input
Rated input voltage/ DC voltage range	48 V /41 V – 63 V
Max. battery charging current	100 A
DC rated charging current	85 A
Battery capacity range	100 – 10 000 Ah
Charge control	IUoU with automatic full and equalization charge
Efficiency/Protection
Max. efficiency/ CEC efficiency	96 %/ 94%
Self-consumption with no load /standby	25 W / 4W
Protection type	NEMA 1 (indoors)
Certification	UL 1741 / UL 1998
Device protection	short-circuit, overload, overtemperature, battery deep discharge
Mechanical data	4548-US
Width / height / depth	18.4 / 24.1 / 9.3 inch (467 / 612 / 235 mm)
Weight	139 lbs (63 kg)
Operating temperature range	–13°F ... 122°F (–25 °C ... +60 °C)
Warranty	5 years

• SMA Sunny Island SI 4548-US and SI 6048-US 48VDC Datasheet
  
  SMA Sunny Island SI 4548-US and SI 6048-US 48VDC Installation Manual