Solar 4 RVs
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Caravan Power System
Caravan Power System
Solar 4 RVs
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System Diagram
Live power flow
Show negative paths
Advanced solar
100%
RV DC cable sizing diagram
Schematic showing solar panels connected through a two-pole isolation switch to the charge controller, plus charging, busbar, protection, monitoring, and house battery connections with stocked installation cable recommendations, calculated minimums, and fuse sizes.
+
−
1S1P
−
−
+
+
Solar Isolator
2-Pole
+
−
Inverter / Charger
+
−
AC Mains Charger
+
−
+
−
DC-DC Charger
+
−
Starter Battery
+
−
+
−
Solar Charge Controller
20A
Positive Busbar
250A
Negative Busbar
250A
+
+
Main
Switch
SHUNT
−
−
B1
RJ12
Battery
Monitor
Display
+
−
House Battery
Solar calculated minimum
4 mm2
0.43 Vd / 3.6%
400A
Calculated minimum
2x 50 mm2
0.26 Vd / 2.2%
40A
Calculated minimum
6 B&S
0.39 Vd / 3.2%
40A
Calculated minimum
8 B&S
0.41 Vd / 3.4%
40A
Calculated minimum
6 B&S
0.54 Vd / 4.5%
25A
Calculated minimum
4.59 mm2
0.57 Vd / 4.8%
250A
1A
400A
Calculated minimum
2x 50 mm2
0.26 Vd / 2.2%
Positive battery cables
Cable lengths must be equal.
Negative battery cables
Cable lengths must be equal.
Starter volts
12
24
48
V
Battery volts
12
24
48
V
Mains charger
A
Mains run
m
Inverter load
VA/W
Inverter run
m
DC-DC charger
A
Starter run
m
House run
m
Batteries
parallel
Battery run
m
Solar series
panels
Solar parallel
strings
Panel watts
W
Panel Vmp
V
Solar run
m
Controller run
m
Electrical Inputs
Starter volts (V)
12 V
24 V
48 V
Battery volts (V)
12 V
24 V
48 V
Inverter load (VA/W)
Inverter run (m)
Mains charger (A)
Mains run (m)
DC-DC charger (A)
Starter run (m)
House run (m)
Batteries (parallel)
Battery run (m)
Solar series (panels)
Solar parallel (strings)
Panel watts (W)
Panel Vmp (V)
Solar run (m)
Controller run (m)
