Solo 6.5K Inverter
Reliable Off-Grid and Backup Power with Smart Controls and Scalable Performance
Coming Q4 of 2025!
Solo 6.5K Inverter
Reliable, Flexible Power for Non-Export Applications
The Fortress Power Solo 6.5K is a powerful and flexible 6.5kW split/single-phase hybrid inverter designed for off-grid living, backup power, and grid-tied solar systems. Featuring a built-in 140A solar charge controller and support for both grid and generator input, the Solo 6.5K Inverter ensures seamless power management and reliable operation in any energy scenario. Its intelligent switching system provides uninterrupted power, while time-of-use scheduling helps homeowners lower utility bills by optimizing when energy is stored and used.
Perfect for residential applications, the Solo 6.5K Inverter supports parallel installation of up to six units—delivering up to 39kW of output power. Optional current transformers (CTs) enhance safety and precision by monitoring current flow and improving system stability. Whether you’re powering a remote cabin, designing a smart microgrid, or adding resilience to your grid-connected home, the Solo 6.5K Inverter delivers clean, stable energy when and where you need it.
Applications
Off-Grid
Grid-Tied
FEATURES
PRODUCT INFORMATION
| 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 (H x W x D) | 27 x 16.1 x 5.5 in (686 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 Power | TBD |
| Maximum Battery Charge Power (with PV) | 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 |
Coming Soon
VIDEO LIBRARY
Video Library Coming Soon
PRODUCT COMPATIBILITY
FREEDOM OF CHOICE WITH OUR ENVY INVERTERS!
Our Envy inverters are battery-agnostic!
What does this mean for you? It means you get to choose the battery that aligns with your vision. Our inverters seamlessly integrate with a wide range of lithium batteries. We have compiled a list of all the battery manufacturers you can choose from!
Info Sheet
Download Here
Monitor and control your EV6500-S Inverter Anywhere and Anytime!
✅ Monitor Performance of Each Battery
✅ Update Firmware Over The Air
✅ Participate in Virtual Power Plant Programs
