Installation Manual

PRELIMINARY

String Optimizer V1500-30 Series

Installation Manual: 57070016-1

v20201023

Failure to follow the prescribed connection and disconnection order can result

in damage to the device.

Follow these instructions to avoid damaging the device. Follow polarity

markings on the optimizer faceplate. Do not cross-wire inputs or output.

Use only MC4-Evo 2 mating connectors or connectors manufactured by

Stäubli that are recognized as being part of the MC connector family with the

appropriate rating.

Per Canadian Electrical Code, the installer is required to mark the device with

the following wording or equivalent, located on or adjacent to each wiring

compartment giving access to high voltage circuits, only if actually connected

to high voltage in the installation:

DANGER — HIGH VOLTAGE

DANGER XXXX V

where XXXX is replaced by the rated voltage.

Connection/Disconnection Order Matters

The following label on the optimizer faceplate serves as a field reference to ensure proper

connection/disconnection order to avoid damaging the device. It is not meant to replace

the instructions that follow.

Figure 12: Connection order label on the optimizer faceplate

Connecting the Inputs

1. Read the warning, caution, and notice statements starting on page 20.

2. Make sure that the unit is properly mounted and grounded.

3. Make sure the strings of PV modules that will be connected to the inputs of the

optimizer meet the acceptable input criteria, fusing, and other requirements

outlined in Chapter 2.

4. For optimizer inputs with strings in parallel

a. Follow your safety procedures and protocols to prepare each set of PV

strings for each optimizer input.

i. Connect the PV modules in series for each string.

ii. Use an appropriately rated multimeter to verify the voltage and

polarity of each PV string before connecting in parallel.