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

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Manufacturer Warranty Included
SKU Offgrid 6500W Inverter
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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
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At OffGrid Living, we are proud to have the best refund and return policies in the industry. If you’re not satisfied with your purchase for any reason, you may return it to us within 30 days for a refund.

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Fortress Power EV6500-S 6500W Offgrid Split Phase Inverter

Description

AVAILABLE IN Nov 1ST 2025 

Reliable, Flexible Power for Off-Grid and Backup Applications

The Fortress Power EV6500-S is a next-generation off-grid solar storage inverter built for reliability, scalability, and intelligent energy control. Designed to handle both split-phase and single-phase loads, it delivers up to 6,500W continuous output and 13,000W peak output, making it ideal for off-grid living, home backup, microgrids, and peak shaving.

Equipped with time-based charging and discharging, generator/grid hybrid input, and intelligent switching, the EV6500-S gives homeowners and installers ultimate flexibility in managing energy consumption and production. Its high-capacity solar charge controller (up to 140A) ensures efficient solar harvesting, while support for up to six parallel units allows expansion up to 39kW of output power.


Product Specifications

GENERAL DATA
Weight 47.84 lbs (21.7 kg)
Operating Temperature 14 ºF – 131 ºF (-10 ºC – 55 ºC), >45 ºC derating
Protection Level IP20 (for indoor use only)
Noise <60db
Dimensions (W x D x H) 25.5 x 16.1 x 5.5 in (648 x 410 x 140 mm)
Cooling Mode Fan
INVERTER OUTPUT
Rated Output Power 6,500W
Maximum Peak Power 13,000 VA
Rated Output Voltage 120/240 VAC (Single/Split-Phase)*
Rated Frrequency 50/60Hz*
Output Wave Pure Sine Wave
Switching Time 10 ms (typical value)
Parallel Number 6
BATTERY PARAMETERS
Compatible Battery Type Lithium-ion battery / lead-acid battery / user- defined battery*
Rated Battery Voltage 48 Vdc
Voltage Range 40 Vdc-60 Vdc*
Maximum Grid/Generator Charge Current 80 A DC*
Maximum Battery Charge Current 140 A DC*
PV INPUT
MPPT Channel Number 2
Maximum Input Power 5,000W+5,000W
Maximum Input Short Circuit Current 18 / 18 A
Maximum Open Circuit Voltage 550 Vdc / 550Vdc
MPPT Operating Voltage Range 150 Vdc-450 Vdc
GRID / GENERATOR INPUT
Input Phase Voltage Range 65 VAC – 140 VAC
Grid Frequency Range 50/60 Hz
Bypass Overload Current 40A
COMMUNICATION
Built-in Interface RS485 / CAN / USB / dry contact*
External Module (Optional) Wi-Fi / GPRS*
EFFICIENCY
MPPT Tracking Efficiency 99.9%
Maximum Efficiency of Battery Inverter 93%
STANDARDS & CERTIFICATIONS
Safety Standards IEC62109-1, IEC62109-2, and UL1741
EMC EN61000-6-1, EN61000-6-3, and FCC 15 class B
RoHS Yes

 

Product Manuals

Data Sheet

Product Warranty

N/A

Product FAQs

Fortress Power Product FAQs

1) Does energy storage work well with my solar system?

Yes. On the grid? Absolutely! Energy storage adds a lot of value to your solar systems. It keeps your solar system operating when your utility service is interrupted. Without energy storage, your PV system will be forced to shutdown when the grid is off.

If you live off grid, energy storage enables you to use the clean solar energy to power your home day and night.

Fortress Power also knows you’re a fan of conservation—energy storage saves both your surplus solar energy and your cash since it reduces on grid energy dependence.

2) Can I use energy storage without solar panels?

Absolutely. For on grid clients, a home energy storage unit  stores energy from your electricity provider. If an outage occurs, home energy storage can provide up to 24 hours of potentially life-saving power. Need more reassurance? Fortress Power offers batteries with larger storage capabilities, completely customizable to your needs. And, like you, we appreciate saving money. When electricity is at its lowest daily rate, our smart energy storage units use that period to charge. When peak electric use occurs, our energy storage units can discharge power to suit your lifestyle.

3) What about power outage protection?

Power interruptions shouldn’t disrupt your schedule. An energy storage system will keep your solar system operating during grid outages. When paired with solar panels, an energy storage system supplies unlimited energy delivery. The solar panels power your home during the day and use any excess power to charge the battery. At night, the system keeps your space bright. When used without solar panels, power outage support is dependent on battery size and your energy use. Batteries providing at least 12 hours of backup power are safest.

4) Are home energy storage systems financially beneficial?

You can use the energy storage to shelve your peak usage. When electricity is at its lowest daily rate, our smart energy storage uses that period to charge. During the peak periods, our energy storage system can power your home, reducing your electricity bill. Clients with solar panel installations enjoy a faster return on investment.

5) Do I receive incentives on my energy storage system?

If your energy storage is powered by solar panels, you are eligible for 30% federal tax credit. Many states and utilities provide rebates for homes and businesses with energy storage systems, aiming for grid resilience.