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Transfer Switch, Knife Blade Disconnect, or Bypass Transfer Switch (upstream of Main Service Panel and
Line-Side Tap). – see Diagrams Section Pgs. 8-17
2. CT Sensor Size
• Each Inverter includes three (3) x 1 3/8” CT sensors (fits up to 4/0 AWG service wires and busbars)
• We have 2” (> 4/0 AWG or Metal Busbars) sensors available for purchase if needed.
• Dimensions refer only to CT sensor hole size; contact Sales at (972) 575-8875 Ext 1 to purchase larger
sensors
3. CT Sensor Extension Example
4. CT Sensor Wiring
• Wire CT sensor on L1 to pins 1 (white +) and 2 (black -)
• Wire CT sensor on L2 to pins 3 (white +) and 4 (black -)
• Wire CT sensor on L3 to pins 5 (white +) and 6 (black -).
• Twist the black and white wires for each sensor along the length of the run,
• If needed, you may extend the range using Shielded Cat 6 (use two twisted pair wires per sensor),
• Use two shielded Cat 6 cables for sensor extensions.
5. CT Sensor Direction
• The arrow embossed on the CT sensor housing helps determine the direction.
• Install CT sensors with the arrow pointing toward the Inverter.
6. Peak Shaving Mode
• Grid Peak Shaving is available with the CT sensors in the location described above and the correct arrow
direction
7. CT Ratio
Set the CT ratio; the default value is 2000/1. DO NOT change this value unless you speak with technical
support; 3rd Party CT sensors require our permission not to void the warranty.
8. Parallel 120VAC/208VAC Three-Phase Note*
Please contact Sol-Ark technical support for parallel operation details.
Limiter Sensor Automatic Setup
Requires Batteries and AC coupled panels must be off while detecting. If you do not have batteries: verify
CT sensor placement manually.
A. Install limiter sensors as previously described (shown in all diagrams). We require a battery and grid
connection before starting auto-setup.
B. Navigate to the "Advanced" Tab of the Basic Setup screen (follow the directions below to get there).
A. Touch the gear icon → Touch the Basic Setup button → Select the Advanced tab
C. Select "Auto detect Home Limit Sensors" and press “OK”.
D. Wait for the Sol-Ark to finish its learning process (Sol-Ark will alternate sell-back magnitude between legs,
automatically determining the correct settings for the sensors).
E. Verify sensors were correctly configured (see Fig. D). If they are not correct, repeat the learn function.
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