Rev1.4_5-13-21
How To Set Up Fortress Power Lithium Batteries Using Outback Inverters
Introduction
This integration guide will help set up the charge/discharge parameters of Fortress Power batteries as they relate to Sol-ark inverters, as well as closed-loop communication
Datasheets / Manuals: https://www.fortresspower.com/resources/
Email: techsupport@fortresspower.com
Discord Support: https://discord.gg/kxX6QMjKFw
Phone: 877-497-6937 x 2
Hours: 8:30 AM – 6:30 PM EST
Warranty Submittal: https://www.fortresspower.com/product-warranty/
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IMPORTANT! Fortress batteries may require disassembly if the voltage drops below 40V-44V. optics, OutBack’s free remote monitoring system, can be configured to send email notifications on a low battery to help warn and avoid a complete discharge of the battery.
Radian / FXR Inverter Settings (divide voltage by 2 for 24V FXR settings)
| Inverter | 80% DoD, 6000 cycles |
| Absorb Voltage and Time | 54.4 Vdc / 2.0 hr |
| Float Voltage and Time | 54.4 Vdc /0.0 hr |
| Re-float Voltage | 52.4 Vdc |
| Re-Bulk Voltage | 51.2 Vdc |
| AC Input Mode | Grid-Tied (default, adjust as needed) |
| AC Charger Limit in AC | LFP10: 15 Aac per battery eFlex: 15 Aac per battery eVault: 30 Aac per battery |
| Low Battery Cut-Out Voltage | 49.6V |
| LBCO Delay | 130 seconds |
| Low Battery Cut-in Voltage | 51. |
| High Battery Cut-Out Voltage | 56.4V |
| HBCO Delay | 10 seconds |
| High Battery Cut-in Voltage | 55.2V |
| SeIIRE (Offset) Voltage Max | 51.6V for “zero-outflow”, 53.6V for selling at “100% full” |
| Temp Sensors | Do not use temperature sensors / reduce any temperature coefficients to as close to zero as allowed |
SkyBox Inverter Settings
The settings below should be programmed into the unit under the Custom choice.
| Inverter | |
| Maximum SOC | 100% |
| Minimum SOC | 20% |
| Absorb Charge | Timed |
| Absorb Voltage | 54.4 Vdc |
| Absorb Time | 02:00 hr |
| Float Charge | Disabled |
| Float Voltage | Can be left at default |
| Float Time | Can be left at default |
| Re-float Voltage | 54.4 Vdc |
| Re-bulk Voltage | 52.5 Vdc |
| Equalize Voltage | 54.4 Vdc |
| Minimum Equalize Time | 0:00 |
| Max Charge Current (Adc) | LFP-5 & LFP-10: 50Adc eVault: 100Adc eFlex: 55Adc |
| Max Discharge Current (Adc) | LFP-5 & LFP-10: 90Adc eVault: 125Adc eFlex: 60Adc |
| Grid Charge Limit (kW) | Site specific |
| Low Battery Cutout | 50 Vdc |
| LBCO Delay | 15 seconds |
| Low Battery Cut-in | 51.0 Vdc |
| High Battery Cutout | 56.0 Vdc |
| HBCO Delay | 10 seconds |
| High Battery Cut-in | 55.5 Vdc |
| Battery Series | Custom |
| Battery Model Number | Custom |
| Battery Description | Fortress Power |
| Battery Total Amp-Hours | eFlex: 105Ah LFPP-10: 200Ah eVault: 360 Ah |
| Charge Efficiency Factor | 96% |
| Absorb End Amps | 1Adc |
Charge Controller Settings
| Charge Controller | |
| Absorb Voltage and Time | 54.4, 2 hours |
| Float Voltage | 54. |
| Rebuck Voltage | 52.5 note: higher than inverter |
| DC Current Limit | LFP-10: 80A per battery ÷ # of controllers eVault: 170A per battery ± # of controllers eFlex: 55A per battery ± # of controllers |
| Absorb End Amps | 1A |
Communication Settings
| FLEXnet DC (FN-DC) | If FlexNet DC display voltage is not within 0.1V of inverter terminal voltage, calibrate Outback equipment |
| Battery Amp-hour | eFlex :105Ah per battery LFP-10: 200Ah per battery eVault: 360Ah per battery |
| Charged Voltage | 54.0V |
| Charged Time | 15 minutes |
| Charged Return Amps | 1A |
| Battery Charge | 96% |
| Relay Invert Logic | No |
| Relay Voltage | High = 53.8 ； Low = 51.2 |
| Relay Delay | High = 1, Low = 0 |
| MATE3/MATE3s | |
| FLEXnet DC Advanced | Low SOC Warning = 15% |
| FLEXnet DC Advanced | Critical SOC Warning = 10% |
Calibrate FlexNet DC Instructions:
https://www.outbackpower.com/downloads/documents/appnotes/fndc_field_cal_app_note.pdf
05 Keystone Rd, Southampton, PA 18966. (877) 497 6937. sales@fortresspower.com. Fortresspower.com
Documents / Resources
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FORTRESS Power eFlex 5.4 Power Lithium Batteries Using Outback Inverters [pdf] Instructions eFlex 5.4, Power Lithium Batteries Using Outback Inverters, eFlex 5.4 Power Lithium Batteries Using Outback Inverters, Using Outback Inverters, Outback Inverters, Inverters |
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FORTRESS Power eFlex 5.4 Power Lithium Batteries Using Outback Inverters [pdf] Installation Guide eFlex 5.4 Power Lithium Batteries Using Outback Inverters, eFlex 5.4, Power Lithium Batteries Using Outback Inverters |
