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OutBack PS1 2500, 3000 Inverters

for Grid-Tie Systems with Battery Backup

AC/DC inverterThe PS1 is advanced engineering and refinement that you have come to expect from OutBack Power in a next generation grid-interactive solar electric system. The system’s battery back-up is a silent and hands-off alternative to noisy and maintenance intensive generators. Designed with an emphasis on performance, the PS1 system operates similarly to standard solar inverters but with the unique benefit of uninterrupted power during utility outages.

In side-by-side "real world" testing, the PS1 system performs within 5% of the industry leading battery-less grid-tie inverter. This translates into more money savings when using net metering. The same field proven MPPT technology found in the MX60 solar charge controller is featured in the PS1. This technology gives the system the ability to use your PV array at its peak output. Uninterrupted AC power is provided by the system’s true sinewave inverter that has an industry leading, California Energy Commission (CEC) certified, efficiency of 91% – thus guaranteeing that your household appliances run seamlessly while utilizing all available solar power. Your recommended AGM batteries are maintained and charged by aninnovative OutBack multi-stage charging process, this valuable feature assists in providing reliable back-up power and a battery life up to 10 years.

Like every OutBack Power product, the PS1 is rugged. All components are protected within an aluminum type 3R rainproof enclosure. An ultra-fast 16 millisecond AC transfer switch guarantees that even sensitive back-up loads, like computers, never know when a grid outage occurs. The ETL listed system is pre-wired by OutBack engineers to ensure that the PS1 system works reliably for years to come. A standard 5-year warranty provides peace of mind and satisfies state rebate requirements.

High performance, battery back-up, and proven OutBack engineering makes the PS1 system the only choice for a premium grid interactive solar power system.


  • Battery-based Power Back-up
  • True Sinewave Output
  • CEC certified 91% Efficiency Inverter
  • Zero AC Watts Consumed at Night
  • Proven Maximum Power Point Tracking
  • 16 Millisecond AC Transfer Switch
  • Type 3R Rainproof
  • Multiple Anti-Islanding Safeguards
  • Standard 5-year Warranty
Technical Specifications
Vented PS1-3000
Sealed PS1-2500
Continuous Power Rating At 40° C 3000 VA 2500 VA
  At 25° C 3600 VA 3000 VA
AC Voltage / Frequency Output
120 VAC 60 Hz
AC Input Current Maximum ACTransfer Switch / System Bypass
50 amps AC
  Battery Charger 20 amps AC with automatic back-off 16 amps AC with automatic back-off
Maximum AC Surge Current Peak (1 millisecond)
70 amps AC
  RMS (5 seconds)
50 amps AC
Maximum PV Array Wattage
3300 watts DC stc rating
PV Open Circuit Voltage Maximum
150 VDC
MPPT Input Voltage Range
44 to 135 VDC
PV Array Ground Fault Protection
Standard - 80 amp DC
Inverter Efficiency Typical 91% (CEC Certified) 91% (not CEC Certified)
MPPT Efficiency
Overall System Efficiency Typical
Battery Voltage - Nominal
48 VDC
Minimum / maximum operating range
40 to 60 VDC
Battery Charge Rate Inverter 45 amps DC 35 amps DC
60 amps DC
AC Output Voltage Regulation Typical
120 VAC
AC Output Current Inverting 30.0 amps AC 25.0 amps AC
  Selling 25.0 amps AC 20.8 amps AC
Total Harmonic Distortion Inverting
< 5% current THD per UL1741 conditions
AC Transfer Switch Speed Typical
< 16 Milliseconds
Battery Temperature Sensor
Operating Temperature Range
-40° C to 60° C (power derated above 25° C)
Recommended Mininum Energy Storage
4 kWHRS at 80% discharge
Recommended Batteries
Four AGM type 31 or type 27 sealed VRLA
Optional MATE system display with RS232 port
Enclosure Materials
Powedercoated aluminum with stainless steel hardware
Wall mount, 16-inch on center studs
Recommended Mounting Hardware
5/16 x 2.5" Lag Bolts - three per side minimum
System Enclosure Dimensions (HxWxD) Unit
31.3 x 17.25 x 12.9" (80 x 44 x 33 cm)
40.5 x 20.5 x 17.25" (103 x 52 x 44 cm)
Battery Enclosure Dimensions (HxWxD) Unit
36.25 x 17.25 x 12.55" (92 x 44 x 32 cm)
43.25 x 20.25 x 16.75" (110 x 51 x 43 cm)
System Weight Unit
107 lbs (49 kg)
117 lbs (53 kg)
Battery Enclosure Weight (without batteries) Unit
29 lbs (13 kg)
47 lbs (21 kg)
ETL certified to the UL1741 standard
Anti-Islanding Measures
UL1741 compliant
5 year limited repair warranty standard
Field Installable Options
MATE or MATE2 remote system display
OBAC breakers for additional AC load circuits
OBPV breakers for PV array series string protection


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