SMA America, LLC
Inserting the strings
Installation Guide
SBCBTLUS-IUS094510
19
5 Inserting the strings
1. Determine the number of the required strings referring to your system calculation.
2. Open the Sunny Boy Combiner Box (see 8.1 ”Opening the Sunny Boy Combiner Box”
(page 27)).
3. Break out the number of knockouts needed for the cable conduits. For each string cable a
seperate conduit is needed.
4. Insert the cable conduit fittings into the knockout holes.
5. Pull the cable conduits into the fittings and tighten them.
6. Draw the string cables through the cable conduits into the Sunny Boy Combiner Box.
☑ The cables are inserted into the Sunny Boy Combiner Box.
NOTICE
Infiltration of water during mounting and installation of the product.
Damage to the product will result.
• Do not open the Sunny Boy Combiner Box when it is raining or when there is very
high humidity > 95 %.
• For conduit hubs, use only UL listed rainproof, or wet location hubs complying with
UL 514B for entry into the enclosure.
Position
Description
A
DC input
B
Grounding
C
DC combined output
