Blue Sky Energy - Solar Boost 2512i and 2512iX
7
BATTERY AND PV WIRING
A desirable installation will produce a total system wiring voltage drop of 3% or less. The lengths shown in Table 2 are one way from the PV modules to the
battery with the 2512 located along the path. Wire length can be increased inversely proportional to actual current. If current was reduced by ½, wire lengths could
be doubled and still provide the same 3% voltage drop.
MAXIMUM CONDUCTOR PAIR LENGTH
–
3% VOLTAGE DROP
WIRE GAUGE
AWG
12 VOLT SYSTEM @20AMPS
FEET / METERS
12 AWG
6.4 / 1.9
10 AWG
10.2 / 3.1
8 AWG
16.2 / 4.9
6 AWG
25.7 / 7.8
4 AWG
40.8 / 12.5
TABLE 2
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CAUTION:
Battery, PV and Auxiliary Output terminal block accept #20
10 AWG wire and are to be tightened to 9 in-lb (1
nm). IPN Network and Temperature Sensor compression terminals accept #24
14 AWG wire and are to be tightened to 2.1 in-
lb (0.24 nm).
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CAUTION:
DO NOT connect Bat– and PV– together outside of the unit or improper operation will result. Bat– and PV–
connect together internally.
SETUP AND WIRING DIAGRAM
FIGURE 3
AUXILIARY OUTPUT
(Omitted on SB2512i)
The auxiliary output can serve one of three functions; a 2 amp auxiliary battery charger, a 25 amp load controller with Low Voltage Disconnect (LVD), or a
25 amp variable Dusk-to-Dawn lighting load controller. The Charge/Load function is selected by DIP switch #3 shown in Figure 3. The IPN-ProRemote is required
to adjust LVD thresholds or enable Dusk-to-Dawn lighting control. Auxiliary outputs in a multi-controller system will function normally, but only the auxiliary output in
the master can be configured or monitored using the IPN-ProRemote. The auxiliary output Load Indicator will illuminate whenever the auxiliary output is ON.
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CAUTION:
The auxiliary output cannot perform both auxiliary battery charge and load control functions at the same time. Do not
connect to the 25amp Load terminal for auxiliary battery charge.
