MorningStar Integration Guide

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SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail] | SimpliPhiPower.com
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• Max. continuous charge current for PHI 3.8 48V = 37.5A
• PV charge controller max = 60A
B
#PV
≥ 60A / 37.5A = 1.6
A properly sized PHI battery bank based on available PV charge would have a minimum of 2 batteries.
Sizing the battery bank in this way 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 the Discharge Calculation Example and Charge Calculation Example A, this translates into 3
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
Morningstar equipment.
4.1 – Depth of Discharge
In order to optimize performance and the life of your system and PHI batteries, SimpliPhi recommends
programming the equipment settings for 80% Depth of Discharge (DoD). This enables the batteries to achieve
an expected 10,000 cycles. Greater DoD is possible but will result in reduced cycle life.
4.2 – Inverter Settings
The SureSine-300 inverter settings can be programmed to custom battery settings over Modbus on a PC
computer; there is currently no Setup Wizard (as is used to custom program Morningstar’s charge controllers).
A complete Modbus data editing guide from Morningstar is available
at this link. In addition to downloading
ModScan32, a USB MeterBus Adapter (model UMC-1), linked here, is required. This adapter allows you to
interface between the inverter (which has an RJ-11 electrical interface) and your PC computer (with a standard
USB port).
Please review Table 1.0 below for Morningstar inverter program settings.
Table 1.0 - Settings for SimpliPhi PHI 730 & 1.4 Batteries w/ Morningstar SureSine-300 Inverter
SURESINE-300 INVERTER
PHI 730 Wh & 1.4 kWh; 12V
Setting
Low Voltage Disconnect
12.6 (80% DoD)
12.4 (90% DoD)
12 (100% DoD)
Low Voltage Reconnect
12.8
LVD Warning Threshold (buzzer)
12.6
LVD Delay Period
10 sec
Instant LVD
12
High Voltage Disconnect
15
High Voltage Reconnect
14
Notes:
• The SureSine-300 is an inverter without a built-in charger.