Blue Sky Solar Boost 3000i - Manual (Page 10)

Blue Sky Energy – Solar Boost 3000i
9
BATTERY AND PV WIRING
A desirable installation will produce a total system wiring voltage drop of 3% or less. The lengths shown in Table 3 are one way from the PV modules to the
battery with the 3000i 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 two wire sizes larger than shown (e.g., 8awg rather than 12awg) for the wire
section between the 3000i and the battery.
MAXIMUM CONDUCTOR PAIR LENGTH – 3% VOLTAGE DROP
WIRE GAUGE
AWG
60 CELL MODULES @11.8AMP INPUT
FEET / METERS
36 CELL MODULES @ 24AMPS INPUT
FEET / METERS
12 AWG 17.9 / 5.5 5.3 / 1.6
10 AWG 28.5 / 8.7 8.5 / 2.6
8 AWG 45.3 / 13.8 13.5 / 4.1
6 AWG 71.2 / 21.7 21.4 / 6.5
4 AWG 114.1 / 34.8 34.0 / 10.4
TABLE 3
¾ CAUTION: Battery and PV compression terminals accept #16 − #8 AWG wire and are to be tightened to 15.9 in-lb (1.80 nm).
Temperature Sensor and IPN Network compression terminals accept #26 −16 AWG wire and are to be tightened to 2.1 in-lb
(0.24 nm). Take care to route wires in a manner that does not place undue strain on the 3000i’s compression terminal blocks.
WIRING DIAGRAM
FIGURE 4
OPTIONAL BATTERY TEMPERATURE SENSOR
Install the optional battery temperature sensor as shown in Figure 4. The temperature sensor will be automatically detected by the 3000i.
¾ WARNING: Use only BSE temperature sensor p/n 930-0022-20. Other temperature sensors or electrical connections to the
temperature sensor terminals may damage the 3000i, void the limited warranty, and may cause charge voltage to become
uncontrolled. Note that temperature sensor wires are polarized RED/BLK. The sensor will not function if installed reverse
polarity. The temperature sensor lug has no electrical connection to the sensor element may connect to any battery terminal.