Covid-19: We are still providing phone and web based meetings. Learn More.
The 26% 2020 ITC Tax Credit is available for residential and commercial systems! (There are other rebates and credits too!)
It will go down at end of year! AEC Solar has strategies to help you maximize your credits, rebates, and savings!

AEC Solar
Storage System

Surprised When Your Solar System Stops Working Whenever The Grid Goes Down?

With Fortress Power smart energy storage, you can continue to use your solar power – even during grid outages. Our mission is to provide compact, user-friendly, and affordable energy storage solutions using the latest technology for all homes and businesses. Fortress smart energy storage units can be easily integrated with new and existing PV systems. It simply works by storing clean energy and providing power when you need it.

Fortress Power Advantages

We’re confident we’re a good fit for your energy storage needs, but we want you to find that out for yourself. Contact us to learn more about our innovative, personalized storage solution that grows with you and fits seamlessly into your lifestyle.

Latest Technology

We use the safest, environmentally friendly Lithium Ferro Phosphate technology.

All-in-one Solution

Smart energy management system supports multiple applications.

Lowest Energy Cost

Competitively priced, easy to install, and high trip efficiency.

Long Lasting

10 year warranty up to 6,000 cycles

AEC Solar: Fortress Energy Storage Benefits

Adding Fortress Power Energy Storage to your solar PV systems enables you to maximize the use of your clean solar energy by storing excess solar for use at night.

  • Provide power during grid outages
  • Lower your electrical bill by avoiding having to buy electricity at peak times
  • Enjoy a 30% investment tax credit when incorporating with solar
  • Increase your independence from the utility grid

Why AEC Solar and Fortress Power are better than alternative power back-up solutions.

Fortress Power Solution
Other Lithium Ion Solutions
Lead Acid
Backup power, time of use, self-consumption & off grid
Backup power, time of use, self-consumption & off grid
Backup power
Backup power
Depth Of Discharge
Battery Chemistry
Safest technology
Potential thermal runway
Risk of harmful gases
Environmental pollution
Life Cycles
Up to 6,000
10 years*
10 Years
6 months
2 years
Fuel Cost
$.50 per kWh
Every 6 months

*10-year warranty for Fortress Power Battery; 5-year warranty for Darfon inverter


  • Battery backup – A simple, robust option for using clean energy to keep a building powered during power outage.
  • Self-supply – Obtain energy independence by storing excess solar energy for later use
  • Time-of-Use – Store off-peak grid power for use when utilities charge the highest rates.
  • Demand charge curtailment – Reduce the demand charge for businesses
  • Off-grid – Use renewable energy to power your home during the day light, and stored excess energy for the night.

Technical Specifications

Darfon Inverter AC Output
Surge Power At Backup
5.5/6.5/7.5 kW  (40/5/1 second)
Transfer Switch
48 amps auto-transfer relay
AC Grid Voltage
120/240 volts
AC Output
21 amps
Battery Input Voltage
40-58.4 volts
Battery Life Cycles
Up to 6,000
Battery Capacity
10, 15, 20 or 30 kWh
UL recognized component*

*Inverter: UL 1741, IEEE 1547, FCC Class B; Battery cell: UL 1642, UN/DOT, ROHS

Fortress Install
Contact Us

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