Schneider Electric Integration Guide

REV20201
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SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail] | SimpliPhiPower.com
| 5 |
B
#Inv
≥ 6.8 kW / 0.925 / 1.9 kW = 3.8
A properly sized PHI battery bank based on maximum discharge of the inverter would have a minimum of 4
batteries. This ensures no greater than C/2 battery load. If the PHI battery bank has fewer batteries than
calculated, special care must be taken with the inverter settings to limit the load below the specified rating of
the PHI battery. These settings are described in the following sections of this Integration Guide.
3.2 - Charge Calculation: Charge Controller Power Bank Sizing
To optimize solar harvesting, a properly sized PHI battery bank should be able to accept the maximum PV
charge current. To determine the minimum number of PHI batteries required to optimize PV, consider the solar
PV array size and the charge controller(s) potential charging output.
Charge Example: B
#PV
≥ I
PVChrgMax
/ I
BatChrgMax
• PHI 3.8-51.2V
nom
battery is rated at 37.5A MAX Continuous Charge Rate
• Solar PV array is rated at 4,000 Watts
• PV charge controller max = 80A
The 4,000-Watt solar PV array has a maximum potential output current of 83.3 Amps DC at 48 Volts DC:
4,000 Watts / 48 Volts = 83.3 Amps.
However, the charge controller’s 80A maximum output rating limits the solar PV array’s output (through the
charge controller) to 80 Amps. Because the charge controller’s maximum output amps is less than the solar PV
array’s maximum potential output current, we’ll use the charge controller’s output current rating as the
determining factor when calculating the battery bank’s Charge Calculation:
B
#PV
≥ 80A / 37.5A = 2.13
A properly sized PHI battery bank based on available PV charge would have a minimum of 3 batteries. This
maximizes the use of available PV while ensuring the batteries are never stressed by overcharging. If the PHI
battery bank has fewer batteries than calculated, special care must be taken with the charge controller settings
to limit the charge rate below the specified rating of the PHI battery. These settings are described in the
following sections of this Integration Guide.
In summary: When comparing the same system using these two calculations for sizing the PHI battery bank,
the minimum number of batteries should be the greater of the two results (Discharge Calculation & Charge
Calculation). In this example, this translates into 4 PHI batteries in the system.
4.0 – Program Settings for PHI Batteries
In order to maintain the Warranty, it is critical to ensure that the appropriate settings for the desired Warranty
are programmed in all of the system components. This section will cover the basic concepts and settings for
Schneider Electric equipment.
4.1 – Depth of Discharge
In order to optimize performance and the life of your system and PHI batteries, SimpliPhi Power recommends
programming the equipment settings for 80% Depth of Discharge (DoD). This enables the batteries to achieve
the greatest expected 10,000 cycles. Greater DoD is possible but will result in reduced cycle life.