MidNite Solar Integration Guide

REV070219
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail] | SimpliPhiPower.com
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Note: Refer to the Discharge Calculation instructions included in your relevant inverter manufacturer
Integration Guide. 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).
3.2 – Midnite Solar Charge Controller Battery Bank Sizing
Examples
The Midnite Solar charge controller’s charge current ratings vary by model. The Midnite Solar Classic and
Classic Lite models are listed below.
• Midnite Solar Classic 150 & 150 Lite 96A on 12V / 94A on 24V/ 86A on 48V
• Midnite Solar Classic 200 & 200 Lite 79A on 12V / 78A on 24V/ 78A on 48V
• Midnite Solar Classic 250 & 250 Lite 61A on 12V / 62A on 24V/ 55A on 48V
Recommended minimum PHI battery bank sizes based on Charge Calculations are listed in the table
below. The inverter selection and its max load (kW rating) will determine the recommended Discharge
Calculation battery bank sizing, which may increase the recommended minimum PHI battery bank size.
Table 1.0 – PHI Battery Bank Sizing v. Charge Controller Model
Battery
PHI 3.8 kWh
PHI 2.9 kWh
Model Voltage
48V
24V
48V
24V
Max Continuous Charge Current (A)
37.5
45
28.5
45
Midnite Solar Model
Max Current (A)
Minimum # Batteries in Bank
Classic 150 & 150 Lite
86 (48V) or 94 (24V)
3
3
4
3
Classic 200 & 200 Lite
78
3
2
3
2
Classic 250 & 250 Lite
55 (48V) 62 (24V)
2
2
2
2
4.0 – Program Settings for PHI 3.8 Battery
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 Midnite Solar 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 qualifies for the SimpliPhi
10-year / 10,000 cycle Warranty on the PHI batteries. Greater DoD is possible, but will result in reduced
cycle life. Refer to the PHI 3.8 kWh Battery Warranty to compare DoD settings and the associated
Warranty.
CAUTION: If a firmware update is executed on Midnite Solar equipment, ALL the settings must be
reverified. The programmed settings shown in the following table must be applied based on
desired Warranty/Cycle life. The recommended is 80% Depth of Discharge.