RV Cable Planner

Size each positive and negative cable run, check voltage drop, and build a cable shopping list.

Load & Charge Summary

Calculated from active cable runs
RV cable system with solar, battery, charging and load paths
Solar array → controller10 A @ 12 V
Controller → house battery20 A @ 12 V
House battery → loads100 A @ 12 V
DC-DC → house battery30 A @ 12 V
Total charging current80 A @ 12 V

Bill of Materials

6 materials
2B&S (32mm²) Red Single Core Automotive Cable per Metre
4 m
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2B&S (32mm²) Black Single Core Automotive Cable per Metre
4 m
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6B&S (13.5mm²) Twin Core Automotive Cable per Metre
12 m
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8B&S (7.9mm²) Twin Core Automotive Cable per Metre
3 m
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6mm (4.59mm²) Twin Core Automotive Cable per Metre
3 m
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6mm² Twin 1500V IEC 62930 Solar Cable per Metre
7 m
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Total cable costLoading…Loading prices.

Cable Runs

7 active runs
System Voltage (V)
Circuit
System summary group
Status
No warningsRun checks passed
Current (A)
One-way length (m)
Protection rating (A)
Voltage drop
2.72% / 0.33V calculated
Recommended cable2 B&S per polarity3 m red positive + 3 m black negativeCurrent Rating Incl. Derating Factor: 133.31 A
Cable clipped to a panel routing diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Single cable run, touching grouping diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Circuit
System summary group
Status
No warningsRun checks passed
Current (A)
One-way length (m)
Protection rating (A)
Voltage drop
3.24% / 0.39V calculated
Recommended cable6 B&S twin-core pair5 m twin-core cable (red + black pair)Current Rating Incl. Derating Factor: 86 A
Cable clipped to a panel routing diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Single cable run, touching grouping diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Circuit
System summary group
Status
No warningsRun checks passed
Current (A)
One-way length (m)
Protection rating (A)
Voltage drop
3.4% / 0.41V calculated
Recommended cable8 B&S twin-core pair3 m twin-core cable (red + black pair)Current Rating Incl. Derating Factor: 59.98 A
Cable clipped to a panel routing diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Single cable run, touching grouping diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Circuit
System summary group
Status
No warningsRun checks passed
Current (A)
One-way length (m)
Protection rating (A)
Voltage drop
4.54% / 0.54V calculated
Recommended cable6 B&S twin-core pair7 m twin-core cable (red + black pair)Current Rating Incl. Derating Factor: 86 A
Cable clipped to a panel routing diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Single cable run, touching grouping diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Circuit
System summary group
Status
No warningsRun checks passed
Current (A)
One-way length (m)
Protection rating (A)
Voltage drop
3.81% / 0.46V calculated
Recommended cable4.59 mm2 twin-core pair3 m twin-core cable (red + black pair)Current Rating Incl. Derating Factor: 43.25 A
Cable clipped to a panel routing diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Single cable run, touching grouping diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Circuit
System summary group
Status
No warningsRun checks passed
Current (A)
One-way length (m)
Protection rating (A)
Voltage drop
3.95% / 0.47V calculated
Recommended cable6 mm2 joined single-core pair7 m joined red + black single-core pairCurrent Rating Incl. Derating Factor: 70 A
Cable clipped to a panel routing diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Single cable run, touching grouping diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Circuit
System summary group
Status
No warningsRun checks passed
Current (A)
One-way length (m)
Protection rating (A)
Voltage drop
0.91% / 0.11V calculated
Recommended cable2 B&S per polarity1 m red positive + 1 m black negativeCurrent Rating Incl. Derating Factor: 133.31 A
Cable clipped to a panel routing diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−
Single cable run, touching grouping diagram showing red positive R/+ and black negative B/− conductorsRed positive conductor, R/+Black negative conductor, B/−