Fortress Power

Solar Panels

Inverters

Storage solutions

Charge controllers

Solar Equipment

Racking

Accessories

Solar Panels

Inverters

Storage solutions

Charge controllers

Solar Equipment

Racking

Accessories

65 products

  • Top Rated
    Fortress Power FlexRack

    Fortress Power Enclosure - FlexRack

    SKU: PES-PA-ELC-0371
    MPN NO

    FlexRack

    Fortress Power
    $1,491.50 USD
    $1,491.50 USD
  • Top Rated
    Fortress Power Guardian Battery Monitoring

    Fortress Power Gateway - Guardian Battery Monitoring

    SKU: PES-PA-ELC-0106
    MPN NO

    Guardian Battery Monitoring

    Fortress Power
    $359.81 USD
    $359.81 USD
  • Top Rated
    Fortress Power FlexTower

    Fortress Power Energy Storage System (81.0Kwh Capacity) - FlexTower

    SKU: PES-ESS-BTS-0028
    MPN NO

    FlexTower

    Fortress Power
    $17,466.93 USD
    $17,466.93 USD
  • Top Rated
    Fortress Power Avalon HV Pro ESS battery system components and mobile app interface

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 11.4kW Inverter, 29.4kWh (6 x 4.9kWh Batteries), 200 A Transfer Switch

    SKU: PES-ESS-BTS-0008
    MPN NO

    Avalon HV Pro ESS 11.4kW 29.4kWh

    Fortress Power
    $23,444.96 USD
    $21,461.16 USD $23,444.96 USD
  • Top Rated
    Fortress Power Avalon HV Pro ESS solar battery system with monitoring app interface

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 11.4kW Inverter, 24.5kWh (5 x 4.9kWh Batteries), 200 A Transfer Switch

    SKU: PES-ESS-BTS-0007
    MPN NO

    Avalon HV Pro ESS 11.4kW 24.5kWh

    Fortress Power
    $21,005.60 USD
    $19,228.16 USD $21,005.60 USD
  • Top Rated
    Fortress Power Avalon HV Pro ESS home battery system with app interface shown on smartphone

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 11.4kW Inverter, 19.6kWh (4 x 4.9kWh Batteries), 200 A Transfer Switch

    Sale
    SKU: PES-ESS-BTS-0006
    MPN NO

    Avalon HV Pro ESS 11.4kW 19.6kWh

    Fortress Power
    $16,744.00 USD
    $16,995.16 USD $16,744.00 USD
    Sale
  • Top Rated
    Fortress Power Avalon HV Pro ESS energy storage system and app interface

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 11.4kW Inverter, 14.7kWh (3 x 4.9kWh Batteries), 200 A Transfer Switch

    SKU: PES-ESS-BTS-0005
    MPN NO

    Avalon HV Pro ESS 11.4kW 14.7kWh

    Fortress Power
    $14,762.16 USD
    $14,762.16 USD
  • Top Rated
    Fortress Power Avalon HV Pro ESS home battery storage and monitoring app display

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 7.6kW Inverter, 29.4kWh (6 x 4.9kWh Batteries), 200 A Transfer Switch

    SKU: PES-ESS-BTS-0004
    MPN NO

    Avalon HV Pro ESS 7.6kW 29.4kWh

    Fortress Power
    $22,375.99 USD
    $21,070.39 USD $22,375.99 USD
  • Top Rated
    Fortress Power Avalon HV Pro ESS solar battery system and mobile app interface

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 7.6kW Inverter, 24.5kWh (5 x 4.9kWh Batteries), 200 A Transfer Switch

    SKU: PES-ESS-BTS-0003
    MPN NO

    Avalon HV Pro ESS 7.6kW 24.5kWh

    Fortress Power
    $20,578.72 USD
    $18,837.39 USD $20,578.72 USD
  • Top Rated
    Fortress Power Avalon HV Pro ESS solar battery storage system and app interface

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 7.6kW Inverter, 19.6kWh (4 x 4.9kWh Batteries), 200 A Transfer Switch

    SKU: PES-ESS-BTS-0002
    MPN NO

    Avalon HV Pro ESS 7.6kW 19.6kWh

    Fortress Power
    $18,139.35 USD
    $16,604.39 USD $18,139.35 USD
  • Top Rated
    Fortress Power Avalon HV Pro ESS solar battery system and mobile monitoring app interface

    Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 7.6kW Inverter, 14.7kWh (3 x 4.9kWh Batteries), 200 A Transfer Switch

    SKU: PES-ESS-BTS-0001
    MPN NO

    Avalon HV Pro ESS 7.6kW 14.7kWh

    Fortress Power
    $15,699.99 USD
    $15,699.99 USD

Fortress Power Products at PES Supply

Shop genuine Fortress Power lithium batteries at PES Supply. Known for LiFePO4 lithium energy storage batteries, Fortress Power delivers the quality and reliability that solar installers, electricians, and homeowners trust. As an authorized retailer, we stock a full selection of Fortress Power products ready to ship nationwide.

Why Choose Fortress Power?

  • Proven performance – Fortress Power energy storage are engineered for decades of reliable service
  • OEM warranty – every product ships with full manufacturer coverage
  • Industry reputation – trusted by installers across the country
  • Compatibility – designed to integrate with major system components

At PES Supply, we curate only the best brands in solar and backup power. Fortress Power stands out for its commitment to quality, innovation, and value. Whether you're building a grid-tied solar array, an off-grid cabin system, or a whole-home backup solution, Fortress Power energy storage deliver the performance you demand.

Our team knows Fortress Power products inside and out. We can help you select the right energy storage for your specific project, from sizing and compatibility to warranty and support. Browse the complete Fortress Power selection below and order with confidence from PES Supply.

Browse the full selection below and order today with fast shipping from PES Supply. Questions? Our solar and backup power experts are ready to help you spec the right system—contact us.