Blue Sky Energy - Solar Boost 2512i-HV and 2512iX-HV
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. Length can be increased inversely proportional to actual PV I
MP
such that if current was reduced by 1/2 wire lengths
could be doubled and still provide the same 3% voltage drop. For 60 cell modules use one wire size larger than shown (smaller awg #) for the wire section between
the 2512 and the battery.
MAXIMUM CONDUCTOR PAIR LENGTH – 3% VOLTAGE DROP
WIRE GAUGE
AWG
60 CELL MODULES @11AMP INPUT
FEET / METERS
36 CELL MODULES @ 20AMPS INPUT
FEET / METERS
12 AWG 19.2 / 5.7 6.4 / 1.9
10 AWG 30.6 / 9.3 10.2 / 3.1
8 AWG 48.6 / 14.7 16.2 / 4.9
6 AWG 77.1 / 23.4 25.7 / 7.8
4 AWG 122.4 / 37.5 40.8 / 12.5
TABLE 2
¾ 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).
¾ CAUTION: DO NOT connect Bat– and PV– together outside of the unit or improper operation will result. Bat– and PV–
connect together internally. PV– must connect directly into the 2512 and not to other negative buss bars or grounds.
SETUP AND WIRING DIAGRAM
FIGURE 3
AUXILIARY OUTPUT (Omitted on SB2512i-HV)
The auxiliary output can serve one of three functions; a 2 amp auxiliary battery charger, a 25 amp Low Voltage Disconnect (LVD) load controller, or a 25
amp variable Dusk-to-Dawn lighting load controller with LVD. The Charge/Load function is selected by DIP switch #3 shown in Figure 3. The IPN-ProRemote or
UCM are required to adjust LVD thresholds or enable Dusk-to-Dawn lighting control. Auxiliary outputs in a multi-controller system will function separately, but only
the auxiliary output in the master can be configured or monitored. The auxiliary output Load Indicator will illuminate whenever the auxiliary output is ON.
¾ CAUTION: The auxiliary output cannot perform both auxiliary battery charge and load control functions at the same time. Do not
connect to the 25 amp Load terminal for auxiliary battery charge or the 2512 may be damaged in a manner that voids the warranty.
(13 pages)
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