Integration Guide
Table Of Contents
- 1. introduction
- 2. PHI battery bank-to-inverter connection
- Wire the PHI Battery bank to the Sol-Ark according to the PHI Battery Installation Manual, not according to the Sol-Ark Manual:
- Figure 1 β Sol-Ark to Battery Connection
- It is acceptable but not required to use the ferrite choke on the positive and negative DC busbar-to-inverter leads (see Figure 1 above).
- SimpliPhi and Sol-Ark recommend against using the 100 Ohm resistor included with the Sol-Ark equipment to charge the Sol-Arkβs capacitors when connecting the PHI Batteries for the first time (as described in the Sol-Ark Install Guide Ownerβs Manual).
- Do not install the Battery Temperature Sensor. The PHI Batteries require no temperature compensation.
- 3. Battery bank sizing
- A properly sized PHI battery bank is sized to prevent over-discharge and over-charge from accompanying equipment. While the programming features of the Sol-Ark allow for battery discharging and charging according to specifically set parameters (refer ...
- Therefore, the PHI battery bank should still be sized to protect against over-discharge. In the case of an AC Coupled system setup, the PHI battery bank should also be sized to protect against over-charge from the solar photovoltaic (PV) array. In a D...
- Discharge Example: ,π©-#π°ππ.β₯,,π°ππ-ππΎ.Γ·,π°ππ-πππ.-,π©ππ-ππΎ..
- Charge Example: ,π©-#π·π½.β₯,,π·π½-ππΎ.-π.πΓ,π©ππ-ππΎ..
- ο· AC Coupled Solar PV Array is rated at 8 kW
- ο· PHI 3.8 kWh-51.2Vnom battery has a maximum continuous charge rate of 1.92 kWDC
- ,π©-#π·π½.β₯,,π-ππΎ.-π.πΓ,π.ππ-ππΎ..=π.π
- A properly sized PHI battery bank based on the maximum charge from the AC Coupled solar PV array has a minimum of 6 batteries. This ensures that the battery bank does not over-charge from the AC Coupled solar PV.
- When comparing the same system using both the discharge and charge calculations for sizing the PHI battery bank, the minimum number of batteries in the bank should be the greater of the two results. For instance, when examining the discharge calculati...
- While the PHI battery bankβs charge rate in a DC Coupled system can be limited via Sol-Ark programming (Max A Charge), consider the PHI battery bankβs maximum continuous charge rate in the systemβs design.
- Charge Example: ,π©-#π·π½.β₯,,π·π½-ππΎ.Γ,π°ππ-πππ.-,π©ππ-ππΎ..
- ο· DC Coupled Solar PV Array is rated at 8 kW
- ο· Sol-Ark PV-to-Battery efficiency is 97.5%
- ο· PHI 3.8 kWh-51.2Vnom battery has a maximum continuous charge rate of 1.92 kWDC
- ,π©-#π·π½.β₯,,π-ππΎ.Γ,π.πππ-πππ.-,π.ππ-ππΎ..=π.ππ
- A PHI battery bank utilizing the entire DC Coupled solar PV output potential has 5 batteries. However, programming the Max A Charge in the Sol-Ark to 150 A (4 Γ 37.5 ADC) would prevent the over-charging of a battery bank that includes only 4 batteries...
- Homeowners with little to no loads on during the day (while solar power production is at its peak) might consider sizing a larger PHI battery bank to take advantage of the entire solar PV output potential for battery charging. Homeowners that consiste...
- 4. program settings for phi batteries
- 5. USE CASES & Application notes
- Sol-Ark equipment includes many advanced programming features and a variety of modes (more than one mode can be used simultaneously). This section of the Guide will outline the system programming and setup basics for common use cases. However, refer a...
- 6. SPECIFICATIONS & WARRANTY
- For your reference:
- ο· See PHI 3.8 kWh Specifications Sheet.
- ο· See PHI 2.9 kWh Specifications Sheet.
- ο· See PHI Battery 10 Year Limited Warranty.
- Failure to adhere to installation protocol will void the Warranty.
- 7. SIMPLIPHI TECHNICAL SUPPORT
- For technical support related to your PHI Battery (or other SimpliPhi Power products), please contact us directly at:
- 805.640.6700
- techsupport@simpliphipower.com
REV
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SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | (805) 640-6700 | info@simpliphipower.com | SimpliPhiPower.com 
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Notes: 
1.  These settings are calculated by multiplying the per-battery value by the number of batteries in the connected 
battery bank. 
2.  Max A Charge refers to the maximum charge rate from the solar PV array. Programming this value to the maximum 
value versus the reduced-stress value does not impact the PHI Battery Warranty. 
3.  If the Auto Generator Start is utilized, the AGS is triggered when the batteries reach this set State of Charge (SoC) 
percentage. Once triggered, the generator charges the batteries until they reach approximately 95% SoC, at which 
point the generator turns off. This 95% SoC parameter is not programmable. 
4.  A refers to the maximum charge rate from the grid or the generator. If the Sol-Ark is connected to both the grid and 
a standby generator, the Sol-Ark prioritizes the grid as the batteriesβ charging source. Programming the 
A value to 
the maximum value versus the reduced-stress value does not impact the PHI Battery Warranty. 
5.  By default, battery charging from the solar PV array is prioritized over generator or grid charging. 
6.  When the battery has reached the Absorption voltage setpoint, the Sol-Ark utilizes constant-voltage regulation to 
maintain the battery at the programmed Absorption voltage. The Absorption phase lasts until the batteries charge at 
2% of the programmed Ah size. For example, one PHI 3.8-51.2V
nom
 battery (rated at 75 Ah), will remain in the 
Absorption charging phase until the number of Amps used to charge the battery decreases to 1.5 Amps DC (2% of 
75Ah). 
7.  While the PHI Battery does not require an Equalization charge, programming Equalization to the voltage, frequency 
and duration outlined in the table above ensures that the Sol-Arkβs internal SoC meter re-sets to 100% SoC every 30 
days. 
8.  Smart Loads are no longer powered via solar and/or batteries when the batteriesβ SoC level drops below this 
programmed 
Smart Load OFF Batt value. 
9.  Smart Loads are powered via solar and/or batteries when the batteriesβ SoC level exceeds this programmed Smart 
Load ON Batt value. 
10.  The Sol-Ark stops charging the batteries and powering the loads from the AC Coupled solar PV array once the 
batteriesβ SoC level reaches the 
Smart Load OFF Batt value. 
11.  The Sol-Ark triggers the AC Coupled solar PV array to produce power (powering the loads and charging the 
batteries) when the batteriesβ SoC level exceeds this programmed 
Smart Load ON Batt value. 
CAUTION: When PHI battery quantities change, the capacity & charge/discharge current 
settings must be reassessed. Failure to do so will void the Warranty. 
Grid Setup 
The Sol-Arkβs Grid Setup menu includes many advanced features (refer to Section 5 of this Guide). Regardless 
of the features used, the PHI battery bank should never discharge more than its maximum continuous 
discharge rate. Furthermore, to maintain the PHI batteriesβ Warranty at a 10,000-cycle level, also do not 
discharge the battery bank to a State of Charge (SoC) level less than 20%. These details are controlled in the 
Grid Setup menuβs Limiter tab.  










