Sol-Ark Integration Guide

Rev 2.0 08-28-21
Fortress Power - Sol-Ark Inverter Guide
505 Keystone Rd, Southampton, PA 18966 . [phone]. [e-mail] . Fortresspower.com
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Step 6 – Plug the modified end of the cable into the correct Sol-Ark port.
Fortress batteries communicate with Sol-Ark over RS485 modbus. Even so, Sol-Ark labels its
communication port on its most recent communication card as the “Battery/Canbus” port. Legacy
SolArk inverters may use the RS485 port for battery communication.
Typical SolArk - Battery / CANbus port Indoor 8kW unit - RJ45/485 port Indoor 12kW Unit / RS485 Port
Indoor 12kW - RS485/MOD port
Step 7 – Program the first three tabs in the Battery Setup menu.
Touch the gear icon on the main SolArk home screen to find the Battery Setup menu. Program the
batt/charge/discharge tab as shown below. Call or email for LFP-5/10/15 settings.
Use Batt V charged – only use this feature
when not using BMS control. Select to
enable voltage-based programming.
Use Batt % Charged – Most Sol-Ark
installations will use this feature.
Activate Battery – does not activate the battery but instead helps the battery after deep discharges.
Max A Charge / Discharge - Fortress requires 1 eVault or 2 eFlex per SolArk inverter in BMS control to max out the
SolArk 185A setting. When not using BMS control or when using an undersized battery bank, limit this charge to
55A per eFlex or 100A per eVault. Call Fortress for settings when installing LFP5/10/15 legacy batteries.
Tempco – if this item is not programmable, the BMS is already in control. Don’t worry about it.
RJ45 485
RS485
0mV/C/Cell
0 mV/C/Cell
Note: to recalibrate the Battery % Charged,
uncheck the BMS Lithium Battery 04, and
check the Use Batt V charged box. Let the
battery run for a day of sunny weather to
charge the battery to 56V and then renable
BMS control.
185A
185A
Battery
CANbus