Integration Guide

REV0226
18
SimpliPhi Power, Inc. | 420 Bryant Circle | Ojai, CA 93023, USA | [phone] | [e-mail] | SimpliPhiPower.com
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5.0 – AC Input Charger Limit
The Outback inverter charger current limit setting is made from the AC input side of the charger (not the
DC side of the charger) so the AC charging current must be calculated then entered as the charger limit
setting. Per Outback recommendations:
1. First convert DC charge current to DC watts. (AC and DC watts are the same)
2. Then apply the charger efficiency.
3. Then convert AC watts to AC current.
Table 5.0 – Conversion from DC to AC Limit for 1 to 5 PHI 3.5 kWh 24V Batteries (45A DC limit per PHI battery)
A B C D E F
# of Parallel
Batteries
DC Current
Limit ADC x VDC (24)
WDC ÷ Charger
Efficiency (85% = .85)
Column D ÷ Inverter
Voltage (120 or 240
VAC, dep. on
inverter; 240 VAC
used below)
Round up or down
(only whole #s can
be used as input)
1 45A
1,080 WDC
1,270.59 WAC
5.29 AAC
5 AAC
2 90A
2,160 WDC
2,541.18 WAC
10.59 AAC
11 AAC
3 135A
3,240 WDC
3,811.76 WAC
15.88 AAC
16 AAC
4 180A
4,320 WDC
5,082.35 WAC
21.18 AAC
21 AAC
5 225A
5,400 WDC
6,352.94 WAC
26.47 AAC
26 AAC
Table 3.0 – Conversion from DC to AC Limit for 1 to 5 PHI 3.5 kWh 48V Batteries (34A DC limit per PHI battery)
A
B C D E F
# of Parallel
Batteries
DC Current
Limit
ADC x VDC (48) WDC ÷ Charger
Efficiency (85% = .85)
Column D ÷ Inverter
Voltage (120 or 240
VAC, dep. on inverter;
240 VAC used below)
Round up or down
(only whole #s can
be used as input)
1 34A
1,632 WDC
1,920 WAC
8 AAC
8 AAC
2 68A
3,264 WDC
3,840 WAC
16 AAC
16 AAC
3 102A
4,896 WDC
5,760 WAC
24 AAC
24 AAC
4 136A
6,528 WDC
7,680 WAC
32 AAC
32 AAC
5 170A
8,160 WDC
9,600 WAC
40 AAC
40 AAC
Example - Using the max DC charge current of 45 amps in a 24V system:
1. Multiply the charge current by the voltage:
45 Adc x 24 Vdc = 1080 Wdc
2. Divide this by the charger efficiency (85% = 0.85):
1080 Wdc ÷ 0.85 = 1270 Wac
3. Divide this by the inverter voltage (120 or 240 Vac depending on inverter):
1270 Wac ÷ 240Vac = 5.29 Aac
4. Round up or down because only whole numbers can be used as input.
5 Aac