Install MPPT Jumpers (Optional)

Where the PV input current exceeds the maximum current rating per MPPT (IMP) of 13 A, jumpers can be used to parallel MPPTs to double the total PV input current capacity to 26 A.

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Note
Jumpers are included in the Powerwall 3 accessory bag:
Powerwall 3 Part NumbersJumper Part NumberJumper Image
1707000-11-L or 170700-21-L2009322-xx-y
All other Powerwall 3 part numbers1784893-xx-y
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CAUTION
These jumpers are not interchangeable. Only install the jumpers that ship with the unit.
  1. For a string with IMP > 13 A, connect the string to terminals [1+ and 1-] or [5+ and 5-].
  2. Install a jumper to combine the MPPTs. Combine inputs 1 and 2 (installing jumpers from 1+ to 2+ and from 1- to 2-) or combine inputs 5 and 6 (installing jumpers from 5+ to 6+ and 5- to 6-).
    • A in the following diagrams represents a string where IMP > 13A, so jumpers are installed from MPPT 1 to MPPT 2.
    • B in the following diagrams represents a single string where IMP < 13A, so no jumpers are required
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Note
MPPT PV inputs 3 and 4 cannot be combined and are closed from the factory. Do not remove the factory-installed components closing these inputs (C in the following diagram).
Figure 1. Installing Jumpers on Powerwall 3 Units with P/N 1707000-11-L or 1707000-21-L
Figure 2. Installing Jumpers on All Other Powerwall 3 Units