Battery and pv wiring – Blue Sky Solar Boost 3048L User Manual

Page 23

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Installation and Operation Manual

22

BATTERY AND PV WIRING

¾ WARNING: This unit must be installed and wired in accordance with National Electrical Code,
ANSI/NFPA 70. Over current protection for the battery must be provided externally. To reduce the risk of
fire, connect to a circuit provided with 40 amperes maximum branch-circuit over current protection in
accordance with National Electrical Code, ANSI/NFPA 70.

¾ AVERTISSEMENT: Cette unité doit être installée et câblée en conformité avec le Code Électrique
National, ANSI/NFPA 70. La protection contre le courant excessif doit être fournie de l’extérieur. Afin de
réduire le risque d’incendie, branchez à un circuit fourni d’une protection contre le courant excessif de
maximum 40 ampères par circuit de dérivation, en conformité avec le Code Électrique National,
ANSI/NFPA 70.

¾ WARNUNG: Diese Einheit muß gemäß der Nationalen Elektrischen Code, ANSI/FPA 70 installiert und
angeschlossen werden. Batterieüberstromschutz muß äußerlich geschaffen werden. Um die Feuergefahr
vorzubeugen, schalten Sie bei einem mit Parallelstromkreis der mit einem Stromschutz von höchstens 40
Ampere versorgt ist , gemäß der Nationalen Eletrischen Code ANSI/NFPA 70, ein.

¾ ADVERTENCIA: Esta unidad debe ser instalada y cableada de acuerdo con el Código Eléctrico
Nacional, ANSI/NFPA 70. La protección contra corriente excesiva en la batería deberá ser provista
externamente. A fin de reducir el riesgo de incendio, conecte a un circuito provisto de una protección de
exceso de corriente en la rama del circuito de un máximo de 40 amperes, de acuerdo con el Código
Eléctrico Nacional ANSI/NFPA 70.

¾ CAUTION: Battery and PV compression terminals accept #14

−1/0 AWG wire and are to be tightened

to 50 in-lb (5.6 nm). Shunt and battery temperature sensor compression terminals accept #24

−14 AWG

wire and are to be tightened to 2.1 in-lb (0.23 nm).

¾ CAUTION: Les bornes de batterie et de compression photovoltaïque supportent un câble #14

−1/0 AWG

et doivent être serrées à 50 in-lb (5.6 nm). Les bornes de compression du shunt et du senseur de
température de la batterie supportent un câble de #24

−14 AWG et doivent être serrés à 2.1 in-lb (0.23

nm).

¾ VORSICHT: Die Batterie- und PV Kompressionsterminale ertragen #14

−1/0 AWG Kabel und müssen

bis zu 50 in-lb (5.6 Nm) festgezogen werden. Die Kompressionsterminale mit Schunt- und
Batterietemperatursensor ertragen #24

−14 AWG Kabel und müssen bis zu 2.1 in-lb (0,23 Nm)

festgezogen werden.

¾ PRECAUCIÓN: Los terminales de compresión de la batería y del conjunto fotovoltaico aceptan cables
#14

−1/0 AWG para ser ajustados a 50 in-lb (5.6 Nm). Los terminales de compresión del shunt y del

sensor de temperatura de la batería aceptan cables #24

−14 AWG para ser ajustados a 2.1 in-lb (0.23

Nm).

Wiring requirements for Solar Boost 3048 are different than conventional PV controllers. While the performance of other

controllers may be affected somewhat by wiring, wiring and connections used with this unit can have a significant effect on current
boost performance. The effect wiring has on current boost performance is that PV power wasted heating undersized wires or poor
connections becomes unavailable to charge the battery. A desirable installation would produce a total system wiring voltage drop of
3% or less. Table 3 is meant to serve as a wire size guide which will lead to good boost performance with reasonable wire sizes. The
lengths shown are one way for the wire pair between the PV array and battery.

MAXIMUM CONDUCTOR PAIR LENGTH (3% VOLTAGE DROP AT 24 AMPS)

WIRE GAUGE

AWG

24 VOLT SYSTEM

FEET / METERS

48 VOLT SYSTEM

FEET / METERS

6 AWG

42.8 / 13.0

85.6 / 26.1

4 AWG

68.1 / 20.7

136.1 / 41.5

2 AWG

108.2 / 33.0

216.5 / 66.0

1/0 AWG

172.2 / 52.5

344.5 / 105.0

2/0 AWG

219.3 / 66.8

438.6 / 133.7

3/0 AWG

276.5 / 84.3

552.9 / 168.5

4/0 AWG

348.7 / 106.3

697.4 / 212.6

TABLE 3

Larger wire sizes will tend to improve boost performance whereas smaller wire sizes will reduce boost performance. When

considering wiring, fuse, and connection options think big and short as larger heavier components and shorter wire lengths offer less

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