Click to Download PDF Specification Sheet

Expand your energy storage by 45.6 kWh with the BOSS.12! This carbon-steel enclosure is a NEMA 3R-rated weather-resistant battery bank housing and wiring solution with built-in shelving. Holding up to 12 PHI batteries, this enclosure can be free-standing or pad mounted.

Where to Buy

  • Description
  • Specifications
  • Documentation
  • Video



SimpliPhi Power’s BOSS.12 carbon-steel enclosure is a weather-resistant battery bank housing and wiring solution with built-in shelving. The BOSS consolidates a PHI battery bank paired with any SimpliPhi-compatible Balance of System equipment and can provide additional battery capacity to a SimpliPhi ExprESS or AccESS fully integrated unit. They include terminal blocks for electrical wiring in parallel, busbar-to-terminal block battery cabling, and terminal block to inverter cabling when ordered. The BOSS.12 has been UL 9540 Certified when used with our AccESS 12K with Sol-Ark and with Sol-Ark 12K Inverters.

NEMA 3R-rated, weather- resistant carbon steel enclosures are easily installed and assembled.

Corrosion-resistant fan prevents PHI batteries from reaching maximum 120°F charging temperature.

Energized with cobalt-free, safe and non-toxic PHI batteries that outperform alternative solutions.


Dimensions (W x H x D) 29.5” W x 76”H (w/feet) x 20” D / 75 cm W x 193 cm H (w/feet) x 51 cm D
Weight 428 lbs (194.138 kg.) w/o batteries
Enclosure Rating NEMA 3R Outdoor rated
Mounting Free-standing or Pad-mounted
Built-In DC Connections 2 x 5-point Terminal Busbars, 3/8” lugs, 650 ADC
Charging Temperature 32°F to 120°F (0°C to 49°C)
Maximum Contained Battery Quantity Twelve (12) AmpliPHI or PHI 3.8, 3.5 or 3.4 batteries (each battery measuring 13.5” W x 15.5” H w/terminals x 8” D)
Enclosure Warranty Period 2 years

Specifications are typical/nominal. Subject to change without notice.

  • Manufactured in the United States


How to Wire and Assemble a SimpliPhi Power BOSS.12

  • Stay Current
    with SimpliPhi

    Subscribe to our newsletter
    for news, updates, free
    Elite IQ trainings and more.

  • This field is for validation purposes and should be left unchanged.