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Why choose Fortress Power?

Fortress Power stands out for its safe, high-efficiency lithium battery systems engineered for longevity and performance. With smart energy management, scalable designs, and strong U.S.-based support, Fortress Power delivers reliable energy independence for residential, commercial, and off-grid applications.

Solar Kits

Solar Kits

Engineered for energy independence and efficiency, Fortress Power Solar Kits combine advanced lithium batteries, inverters, and solar panels for reliable, all-in-one renewable energy solutions. Designed for homes, businesses, and off-grid living, these kits deliver dependable power, seamless integration, and long-lasting performance.

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Power Kits

Power Kits

All-in-one energy storage solutions with lithium batteries and inverters, delivering reliable backup power and energy independence for homes, businesses, and off-grid use.

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Inverters

Inverters

High-performance inverters designed to convert stored solar energy into reliable AC power. Built for efficiency, durability, and seamless integration with Fortress Power batteries, they ensure consistent energy supply for homes, businesses, and off-grid applications.

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Batteries

Batteries

Advanced lithium batteries engineered for long life, safety, and high-efficiency energy storage. Ideal for homes, businesses, and off-grid systems, they provide reliable power, scalability, and true energy independence.

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Applications/Solutions

Backup Power for what matters

Live Off The Grid

Solar Self-Consumption

Time-Of-Use & Bill Management

Reduce Peak Demand Charges

Do It Yourself

EV Charging

Microgrid

Fortress Power

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Original price $3,740.00 - Original price $3,890.00
Original price
$3,740.00 - $3,890.00
$3,740.00 - $3,890.00
Current price $3,740.00

Fortress Power eBoost 16kWh Scalable Energy Storage System

Fortress Power
in stock

Fortress Power eBoost 16kWh Scalable Energy Storage System Description Boost Performance. Boost Reliability. The Fortress Power eBoos...

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Original price $3,740.00 - Original price $3,890.00
Original price
$3,740.00 - $3,890.00
$3,740.00 - $3,890.00
Current price $3,740.00
Original price $405.00 - Original price $405.00
Original price
$405.00
$405.00 - $405.00
Current price $405.00

Fortress Power eBoost eway for AC and DC wire management

Fortress Power
in stock

Fortress Power eBoost eway for AC and DC wire management Description The eBoost eWay is an integrated wireway and mounting base included with each ...

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Original price $405.00 - Original price $405.00
Original price
$405.00
$405.00 - $405.00
Current price $405.00
Original price $529.00 - Original price $529.00
Original price
$529.00
$529.00 - $529.00
Current price $529.00

Fortress Power Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Guardian Battery Monitor Description The Fortress Power Guardian is a gateway device that connects Fortress Power Batteries to the c...

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Original price $529.00 - Original price $529.00
Original price
$529.00
$529.00 - $529.00
Current price $529.00
Original price $1,545.00 - Original price $1,545.00
Original price
$1,545.00
$1,545.00 - $1,545.00
Current price $1,545.00

Fortress Power Solo 6.5kW Off-Grid Inverter

Fortress Power
in stock

Fortress Power Solo 6.5kW Off-Grid Inverter Description SPLIT / SINGLE-PHASESOLAR STORAGE INVERTER Reliable, Flexible Power for Non-Export...

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Original price $1,545.00 - Original price $1,545.00
Original price
$1,545.00
$1,545.00 - $1,545.00
Current price $1,545.00
Original price $5,065.00 - Original price $5,065.00
Original price
$5,065.00
$5,065.00 - $5,065.00
Current price $5,065.00

Fortress Power Envy Duo 21 Whole Home 21kW Solar Hybrid Split Phase Inverter

Fortress Power
in stock

Fortress Power Envy Duo 21 Whole Home 21kW Solar Hybrid Split Phase Inverter Description Maximum Power. Dual-Purpose Design. The Fortress...

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Original price $5,065.00 - Original price $5,065.00
Original price
$5,065.00
$5,065.00 - $5,065.00
Current price $5,065.00
Original price $1,689.00
Original price $1,689.00 - Original price $1,689.00
Original price $1,689.00
Current price $1,549.00
$1,549.00 - $1,549.00
Current price $1,549.00

Fortress Power EV6500-S 6500W 48V Offgrid Split Phase Inverter

Fortress Power
in stock

Fortress Power EV6500-S 6500W Offgrid Split Phase Inverter Description AVAILABLE IN Nov 1ST 2025Ā  Reliable, Flexible Power for Off-Grid and B...

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Original price $1,689.00
Original price $1,689.00 - Original price $1,689.00
Original price $1,689.00
Current price $1,549.00
$1,549.00 - $1,549.00
Current price $1,549.00
Save 8% Save %
Original price $17,484.00 - Original price $18,013.00
Original price
$17,484.00 - $18,013.00
$17,484.00 - $18,013.00
Current price $17,484.00

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 28.8kWh System Bundle | Envy12 Hybrid Inverter + eForce 28.8kWh Lithium Battery

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 28.8kWh System Bundle | Envy12 Hybrid Inverter + eForce 28.8kWh Stackable Lithium Bat...

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Original price $17,484.00 - Original price $18,013.00
Original price
$17,484.00 - $18,013.00
$17,484.00 - $18,013.00
Current price $17,484.00
Original price $24,465.60
Original price $24,465.60 - Original price $24,465.60
Original price $24,465.60
$22,279.00 - $22,808.00
$22,279.00 - $22,808.00
Current price $22,279.00

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 38.4kWh System Bundle | Envy12 Hybrid Inverter + 2 x eForce 19.2 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 38.4kWh System Bundle | Envy12 Hybrid Inverter + 2 x eForce 19.2 Stackable Lithium Ba...

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Original price $24,465.60
Original price $24,465.60 - Original price $24,465.60
Original price $24,465.60
$22,279.00 - $22,808.00
$22,279.00 - $22,808.00
Current price $22,279.00
Save up to 9% Save %
Original price $23,385.60
Original price $23,385.60 - Original price $23,385.60
Original price $23,385.60
$21,470.00 - $21,999.00
$21,470.00 - $21,999.00
Current price $21,470.00

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 38.4kWh System Bundle | Envy10 Hybrid Inverter + 2 x eForce 19.2 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 38.4kWh System Bundle | Envy10 Hybrid Inverter + 2 x eForce 19.2 Stackable Lithium Ba...

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Original price $23,385.60
Original price $23,385.60 - Original price $23,385.60
Original price $23,385.60
$21,470.00 - $21,999.00
$21,470.00 - $21,999.00
Current price $21,470.00
Save up to 8% Save %
Original price $23,385.60
Original price $23,385.60 - Original price $23,385.60
Original price $23,385.60
$21,309.00 - $21,838.00
$21,309.00 - $21,838.00
Current price $21,309.00

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 38.4kWh System Bundle | Envy8 Hybrid Inverter + 2 x eForce 19.2 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 38.4kWh System Bundle | Envy8 Hybrid Inverter + 2 x eForce 19.2 Stackable Lithium Batt...

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Original price $23,385.60
Original price $23,385.60 - Original price $23,385.60
Original price $23,385.60
$21,309.00 - $21,838.00
$21,309.00 - $21,838.00
Current price $21,309.00
Save up to 9% Save %
Original price $14,391.60
Original price $14,391.60 - Original price $14,391.60
Original price $14,391.60
$13,030.00 - $13,559.00
$13,030.00 - $13,559.00
Current price $13,030.00

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 19.2kWh System Bundle | Envy10 Hybrid Inverter + eForce 19.2 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 19.2kWh System Bundle | Envy10 Hybrid Inverter + eForce 19.2 Stackable Lithium Batter...

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Original price $14,391.60
Original price $14,391.60 - Original price $14,391.60
Original price $14,391.60
$13,030.00 - $13,559.00
$13,030.00 - $13,559.00
Current price $13,030.00
Save up to 9% Save %
Original price $14,391.60
Original price $14,391.60 - Original price $14,391.60
Original price $14,391.60
$12,869.00 - $13,398.00
$12,869.00 - $13,398.00
Current price $12,869.00

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 19.2kWh System Bundle | Envy8 Hybrid Inverter + eForce 19.2 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 19.2kWh System Bundle | Envy8 Hybrid Inverter + eForce 19.2 Stackable Lithium Battery ...

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Original price $14,391.60
Original price $14,391.60 - Original price $14,391.60
Original price $14,391.60
$12,869.00 - $13,398.00
$12,869.00 - $13,398.00
Current price $12,869.00
Save up to 11% Save %
Original price $32,241.60
Original price $32,241.60 - Original price $32,241.60
Original price $32,241.60
$29,569.00 - $30,098.00
$29,569.00 - $30,098.00
Current price $29,569.00

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 57.6kWh System Bundle | Envy12 Hybrid Inverter + 2 x eForce 28.8 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 57.6kWh System Bundle | Envy12 Hybrid Inverter + 2 x eForce 28.8 Stackable Lithium Ba...

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Original price $32,241.60
Original price $32,241.60 - Original price $32,241.60
Original price $32,241.60
$29,569.00 - $30,098.00
$29,569.00 - $30,098.00
Current price $29,569.00
Save up to 8% Save %
Original price $31,161.60
Original price $31,161.60 - Original price $31,161.60
Original price $31,161.60
$28,760.00 - $29,289.00
$28,760.00 - $29,289.00
Current price $28,760.00

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 57.6kWh System Bundle | Envy10 Hybrid Inverter + 2 x eForce 28.8 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 57.6kWh System Bundle | Envy10 Hybrid Inverter + 2 x eForce 28.8 Stackable Lithium Ba...

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Original price $31,161.60
Original price $31,161.60 - Original price $31,161.60
Original price $31,161.60
$28,760.00 - $29,289.00
$28,760.00 - $29,289.00
Current price $28,760.00
Save up to 8% Save %
Original price $31,161.60
Original price $31,161.60 - Original price $31,161.60
Original price $31,161.60
$28,599.00 - $29,128.00
$28,599.00 - $29,128.00
Current price $28,599.00

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 57.6kWh System Bundle | Envy8 Hybrid Inverter + 2 x eForce 28.8 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 57.6kWh System Bundle | Envy8 Hybrid Inverter + 2 x eForce 28.8 Stackable Lithium Batt...

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Original price $31,161.60
Original price $31,161.60 - Original price $31,161.60
Original price $31,161.60
$28,599.00 - $29,128.00
$28,599.00 - $29,128.00
Current price $28,599.00
Save up to 8% Save %
Original price $18,279.60
Original price $18,279.60 - Original price $18,279.60
Original price $18,279.60
$16,675.00 - $17,204.00
$16,675.00 - $17,204.00
Current price $16,675.00

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 28.8kWh System Bundle | Envy10 Hybrid Inverter + eForce 28.8 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 28.8kWh System Bundle | Envy10 Hybrid Inverter + eForce 28.8 Stackable Lithium Batter...

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Original price $18,279.60
Original price $18,279.60 - Original price $18,279.60
Original price $18,279.60
$16,675.00 - $17,204.00
$16,675.00 - $17,204.00
Current price $16,675.00
Save up to 9% Save %
Original price $18,279.60
Original price $18,279.60 - Original price $18,279.60
Original price $18,279.60
$16,514.00 - $17,043.00
$16,514.00 - $17,043.00
Current price $16,514.00

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 28.8kWh System Bundle | Envy8 Hybrid Inverter + eForce 28.8 Stackable Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 28.8kWh System Bundle | Envy8 Hybrid Inverter + eForce 28.8 Stackable Lithium Battery ...

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Original price $18,279.60
Original price $18,279.60 - Original price $18,279.60
Original price $18,279.60
$16,514.00 - $17,043.00
$16,514.00 - $17,043.00
Current price $16,514.00
Save up to 10% Save %
Original price $13,734.00
Original price $13,734.00 - Original price $13,734.00
Original price $13,734.00
$12,311.00 - $12,840.00
$12,311.00 - $12,840.00
Current price $12,311.00

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy12 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guardian Battery Monitor | FlexTower

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy12 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guar...

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Original price $13,734.00
Original price $13,734.00 - Original price $13,734.00
Original price $13,734.00
$12,311.00 - $12,840.00
$12,311.00 - $12,840.00
Current price $12,311.00
Save up to 10% Save %
Original price $12,654.00
Original price $12,654.00 - Original price $12,654.00
Original price $12,654.00
$11,502.00 - $12,031.00
$11,502.00 - $12,031.00
Current price $11,502.00

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy10 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guardian Battery Monitor | FlexTower

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy10 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guar...

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Original price $12,654.00
Original price $12,654.00 - Original price $12,654.00
Original price $12,654.00
$11,502.00 - $12,031.00
$11,502.00 - $12,031.00
Current price $11,502.00
Save up to 9% Save %
Original price $13,654.00
Original price $13,654.00 - Original price $13,654.00
Original price $13,654.00
$11,341.00 - $11,870.00
$11,341.00 - $11,870.00
Current price $11,341.00

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy8 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guardian Battery Monitor | Flex Tower

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy8 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guardi...

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Original price $13,654.00
Original price $13,654.00 - Original price $13,654.00
Original price $13,654.00
$11,341.00 - $11,870.00
$11,341.00 - $11,870.00
Current price $11,341.00
Save up to 17% Save %
Original price $18,990.40 - Original price $19,990.40
Original price $18,990.40 - Original price $19,990.40
Original price $18,990.40
$16,253.00 - $16,782.00
$16,253.00 - $16,782.00
Current price $16,253.00

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 32.4kWh System Bundle | Envy12 Hybrid Inverter + 6 x eFlex Max Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 32.4kWh System Bundle | Envy12 Hybrid Inverter + 6 x eFlex Max Lithium Battery | Guar...

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Original price $18,990.40 - Original price $19,990.40
Original price $18,990.40 - Original price $19,990.40
Original price $18,990.40
$16,253.00 - $16,782.00
$16,253.00 - $16,782.00
Current price $16,253.00
Save up to 16% Save %
Original price $17,910.40
Original price $17,910.40 - Original price $17,910.40
Original price $17,910.40
$15,444.00 - $15,973.00
$15,444.00 - $15,973.00
Current price $15,444.00

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 32.4kWh System Bundle | Envy10 Hybrid Inverter + 6 x eFlex Max Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 10kW 120/240 Output 48VDC - 32.4kWh System Bundle | Envy10 Hybrid Inverter + 6 x eFlex Max Lithium Battery | Guar...

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Original price $17,910.40
Original price $17,910.40 - Original price $17,910.40
Original price $17,910.40
$15,444.00 - $15,973.00
$15,444.00 - $15,973.00
Current price $15,444.00
Save up to 14% Save %
Original price $17,910.40
Original price $17,910.40 - Original price $17,910.40
Original price $17,910.40
$15,283.00 - $15,812.00
$15,283.00 - $15,812.00
Current price $15,283.00

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 32.4kWh System Bundle | Envy8 Hybrid Inverter + 6 x eFlex Max Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 8kW 120/240 Output 48VDC - 32.4kWh System Bundle | Envy8 Hybrid Inverter + 6 x eFlex Max Lithium Battery | Gua...

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Original price $17,910.40
Original price $17,910.40 - Original price $17,910.40
Original price $17,910.40
$15,283.00 - $15,812.00
$15,283.00 - $15,812.00
Current price $15,283.00
Save up to 15% Save %
Original price $13,234.00
Original price $13,234.00 - Original price $13,234.00
Original price $13,234.00
$10,826.00 - $11,355.00
$10,826.00 - $11,355.00
Current price $10,826.00

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy12 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guardian Battery Monitor

Fortress Power
in stock

Fortress Power Hybrid Power Kit | 12kW 120/240 Output 48VDC - 16.2kWh System Bundle | Envy12 Hybrid Inverter + 3 x eFlex Max Lithium Battery | Guar...

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Original price $13,234.00
Original price $13,234.00 - Original price $13,234.00
Original price $13,234.00
$10,826.00 - $11,355.00
$10,826.00 - $11,355.00
Current price $10,826.00
Save up to 18% Save %