Ampt String Optimizer V1500 Series, Installation Manual

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Copyright 2018-2020 Ampt, LLC.
All rights reserved.
15
Ampt String Optimizer V1500 Series
Installation Manual: 57070012-1H
Chapter 2:
Planning Installation
Overview
This chapter defines the acceptable criteria for input connections, describes the appropriate
electrical connections based on the grounding configuration of your PV system, and explains
the mating connector polarities for the inputs and output of the String Optimizer.
Input Criteria
This section defines the acceptable criteria for the two input connections of the Ampt String
Optimizer.
NOTICE
The inputs of the optimizer are not intended for connection to a battery or any
other type of DC source except PV modules.
The following information applies to 60- or 72-cell c-Si/p-Si modules. If you are using
another type of module (e.g. thin film), please contact Ampt for configuration rules.
Acceptable Input Configurations
It is common for inputs 1 and 2 to have the same number of modules (i.e. In1 = In2).
However, if the number of modules between inputs is different, the following conditions
must be met for the optimizer to operate at MPP.
V
oc-cold-in1
≥ V
oc-cold-in2
V
oc-cold-in1
≤ 1500V
V
oc-cold-in1
≤ Inverter maximum input voltage
V
out
/2< V
mpp-in1
< V
out
V
out
/2< V
mpp-in2
< V
out
0.5xP
in1
< P
in2
< P
in1
Acceptable Input Configurations Between Parallel Optimizers
The number of modules on each input between parallel optimizers can vary within an array
so long as they meet the criteria described in the
Acceptable Input Configurations section.