REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | (805) 640-6700 |
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80 𝐴𝑚𝑝𝑠 < 93.75 𝐴𝑚𝑝𝑠 → 𝟖𝟎 𝐴𝑚𝑝𝑠
= 𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑠𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 𝑜𝑢𝑡𝑝𝑢𝑡 𝑡ℎ𝑟𝑜𝑢𝑔ℎ 𝑡ℎ𝑒 𝑐ℎ𝑎𝑟𝑔𝑒 𝑐𝑜𝑛𝑡𝑟𝑜𝑙𝑙𝑒𝑟
(𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑐ℎ𝑎𝑟𝑔𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡) ÷ (𝑀𝐴𝑋 𝐶ℎ𝑎𝑟𝑔𝑒 𝑅𝑎𝑡𝑒 𝑝𝑒𝑟 𝐵𝑎𝑡𝑡𝑒𝑟𝑦)
= 𝑀𝑖𝑛𝑖𝑚𝑢𝑚 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑞𝑢𝑎𝑛𝑡𝑖𝑡𝑦 𝑡𝑜 𝑝𝑟𝑒𝑣𝑒𝑛𝑡 𝑜𝑣𝑒𝑟𝑐ℎ𝑎𝑟𝑔𝑒
(80𝐴) ÷ (37.5𝐴) = 2.13 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 𝟑
Example B: Two PHI 3.8 kWh-25.6V
nominal
batteries (used in a 24-Volt system) must be paired with a 2,000-
Watt solar PV array wired to a 100 Amp-rated charge controller. In this case, the 2,000-Watt solar array is
used to determine the minimum PHI Battery quantity needed to prevent over-charging from the solar PV.
𝑊𝑎𝑡𝑡𝑠 = 𝐴𝑚𝑝𝑠 × 𝑉𝑜𝑙𝑡𝑠
2,000 𝑊𝑎𝑡𝑡 𝑆𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 = 𝐴𝑚𝑝𝑠 × 24 𝑉𝑜𝑙𝑡𝑠
2,000 𝑊𝑎𝑡𝑡𝑠
24 𝑉𝑜𝑙𝑡𝑠
= 𝟖𝟑. 𝟑𝟑 𝐴𝑚𝑝𝑠 = 𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑠𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 𝑜𝑢𝑡𝑝𝑢𝑡
83.3 𝐴𝑚𝑝𝑠 < 100 𝐴𝑚𝑝𝑠 → 𝟖𝟑. 𝟑 𝐴𝑚𝑝𝑠
= 𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑠𝑜𝑙𝑎𝑟 𝑃𝑉 𝑎𝑟𝑟𝑎𝑦 𝑜𝑢𝑡𝑝𝑢𝑡 𝑡ℎ𝑟𝑜𝑢𝑔ℎ 𝑡ℎ𝑒 𝑐ℎ𝑎𝑟𝑔𝑒 𝑐𝑜𝑛𝑡𝑟𝑜𝑙𝑙𝑒𝑟
(𝑀𝐴𝑋 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑐ℎ𝑎𝑟𝑔𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡) ÷ (𝑀𝐴𝑋 𝐶ℎ𝑎𝑟𝑔𝑒 𝑅𝑎𝑡𝑒 𝑝𝑒𝑟 𝐵𝑎𝑡𝑡𝑒𝑟𝑦)
= 𝑀𝑖𝑛𝑖𝑚𝑢𝑚 𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑞𝑢𝑎𝑛𝑡𝑖𝑡𝑦 𝑡𝑜 𝑝𝑟𝑒𝑣𝑒𝑛𝑡 𝑜𝑣𝑒𝑟𝑐ℎ𝑎𝑟𝑔𝑒
(83.3𝐴) ÷ (45𝐴) = 1.85 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 𝟐
Refer to the Battery Bank Sizing for Maximum Instantaneous Charge Rate tables in Appendix B of this
Manual for a complete list of common charge controllers and the minimum quantity of PHI Batteries those
controllers need to be paired with to ensure that the PHI Battery bank does not over-charge (assuming that
the charge controllers’ full current output rating is utilized). Failing to do so will destroy th
e PHI batteries
and Void the Warranty.
3.2.3
–
Sizing for Maximum Instantaneous Charge Rate (AC Coupled)
In an AC Coupled system, charge controllers do not regulate the PV solar array’s output, and many battery
-
based inverters fail to
effectively regulate the array’s output for battery charging. Therefore, in an AC
Coupled system, SimpliPhi assumes th
at all the connected PV array’s potential power output will charge the
system’s batteries. Determine the minimum quantity of PHI Batteries
needed to prevent over-charge from
the solar PV array by dividing the solar array’s power rating by the MAX Continuou
s Charge Rate per PHI
Battery (found in Table 1.0 or on the relevant battery’s specification sheet).
Example: Four PHI 3.8 kWh-51.2V
nominal
batteries must be paired with 6 kW of AC Coupled solar PV to
ensure the PHI Battery bank does not over-charge from the solar array.
(6 𝑘𝑊) ÷ (1.92 𝑘𝑊) = 3.13 → 𝑟𝑜𝑢𝑛𝑑 𝑡𝑜 4
