Wiring RV batteries in parallel is a simple way to boost your power storage while keeping voltage the same. This setup is ideal for extending runtime for lights, appliances, and electronics. Here's a stepbystep guide:  

 What You'll Need  

 Two or more identical batteries (same type, age, and capacity).  

 Heavy duty battery cables (matched to your system current).  

 Wrench or socket set.  

 Safety gear (gloves, goggles).  

 Steps to Connect Batteries in Parallel  

1. Turn Off Power: Disconnect your RV from shore power and shut off all electrical systems.  

2. Position Batteries: Place batteries close to each other (within 1–2 feet) to minimize cable length and resistance.  

3. Connect Positive Terminals:  

Use a cable to link the positive (+) terminal of Battery 1 to the positive terminal of Battery 2.  

4. Connect Negative Terminals:  

Use another cable to connect the negative () terminal of Battery 1 to the negative terminal of Battery 

 5. Link to RV System:  

 Attach your RV’s positive lead to the positive terminal of Battery 1.  

 Attach the negative lead to the negative terminal of Battery 1.  

 Key Tips  

 Balance the Load: For more than two batteries, use a bus bar to ensure even charging and discharging.  

 Check Connections: Tighten terminals securely to prevent arcing or resistance.  

 Test Voltage: Use a multimeter to confirm the combined voltage matches a single battery (e.g., 12V for two 12V batteries).  

Why Parallel Works  

Parallel wiring doubles the capacity (Ah) but keeps voltage unchanged. For example, two 12V 100Ah batteries in parallel become 12V 200Ah, powering your RV twice as long.  

 Safety First:  

 Avoid short circuits by covering terminals with insulating caps.  

 Never mix old and new batteries—imbalanced charging can damage the system.  

 With proper setup, parallel batteries ensure reliable, extended power for your adventures!