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Home Energy Storage Solution

Take control of your energy usage and savings with an onsite Home Energy Storage Solution (HESS) from AEI.


Introducing HESS from Alternate Energy, Inc. – a combination of home battery technology and Mitsubishi Electric solar panels that allow you to capture excess power, store it onsite, and have it delivered when you need it, without exporting to the grid. Utilizing the TESLA Powerwall or Sunverge home battery system and Mitsubishi Electric solar panels, consumers can now optimize their energy savings, have the security of emergency backup power, and completely disconnect from the grid.

TESLA Powerwall Home Battery

  • 10-year manufacturer warranty
  • Wall mounted, rechargeable lithium ion battery with liquid thermal control
  • Allows consumers to go off the grid and completely disconnect from their utility provider
  • Provides emergency backup power during outages
  • 12.8kWh with daily cycling, 100% depth of discharge, and 92.5 round-trip DC efficiency
  • Zero-export: when your PV system produces more than you need, the rest is stored when you need it


  • 10-year manufacturer warranty
  • Lithium-ion technology with a cycle life range of 4000-7000 cycles designed to last 20 years
  • Uninterruptible true UPS and emergency backup power
  • Add capacity in oversaturated circuits
  • Zero-export: when your PV system produces more than you need, the rest is stored when you need it

Mitsubishi Solar Panels

  • 25-year manufacturer warranty
  • Premium monocrystalline solar panels designed to withstand the corrosive effects of salty air
  • 100% made in Japan

Customers who purchase a HESS system can now take advantage of the new Self Supply program offered by the Hawaii Public Utilities Commission on Oahu and Maui. The program allows residential and commercial PV customers to store all of their excess energy for later use.

Alternate Energy is Mitsubishi Electric’s first nationally recognized Elite Dealer for solar PV. All installers are annually trained and certified by Mitsubishi Electric to design, install and service PV systems, Locally owned and operated since 1993, AEI is also one of the few retailers in Hawaii authorized to sell and install Tesla Powerwall systems. 

How Does it Work


  1. Self-Consumption / Zero Export

    If the site is generating more solar power than it needs, the excess is stored for future use.

  2. Back-Up Power

    When the grid goes down, the unit provides back-up power supply backup to the site.

  3. Bill Savings

    When electricity usage is high, the unit dispatches both solar and stored power to reduce consumption.

Ready to get started?

For more information,
call 808-842-5853 or Request a free quote