Installing a built-in RV generator can transform your off-grid experience - powering everything from tools to appliances wherever you travel. The HY3500RVi RV Petrol Generator from Hyundai Power Products is a popular choice for motorhomes and campervans thanks to its compact design, inverter technology, and reliable 3.5kW output.

In this fully optimised guide from Garden-Review, we’ll walk you through how to install the HY3500RVi safely, key setup tips, and what to avoid- plus answer common questions to help you get the most from your generator.

Why Choose the Hyundai HY3500RVi Generator?

Before diving into installation, here’s why this model is worth considering:

• ✔️ 3.5kW max output – ideal for RV appliances and tools
• ✔️ Digital inverter technology – stable, clean power
• ✔️ Remote LCM controller – easy operation inside your vehicle
• ✔️ Compact under-mount design – perfect for campervan conversions
• ✔️ 24L external fuel tank – extended runtime

👉 tip: If you’re building a full off-grid setup, pair this with a battery management system and solar panels for hybrid energy use.

⚠️ Safety First (Don’t Skip This)

Installing a petrol generator involves fuel, exhaust gases, and electrics - so safety is critical.

• ✅ Never install or run in enclosed spaces (carbon monoxide risk)
• ✅ Always use proper PPE (gloves, hearing protection, workwear)
• ✅ Fuel is highly flammable - keep away from sparks
• ✅ The generator is heavy - lift with assistance
• Professional installation is strongly recommended

Tools & Materials You’ll Need

To install the HY3500RVi, you’ll typically require:

• Mounting brackets or slide-out frame
• Anti-vibration mounts
• Exhaust sealant paste & heat wrap
• Fuel-grade hoses
• 10mm² copper wiring
• Engine oil (SAE 15W-40, 500ml)

👉 A complete RV generator installation kit can save time and ensure compatibility - look for kits with vibration mounts and exhaust components included.

Step-by-Step Installation Guide

1. Add Engine Oil (Before Anything Else)

The generator is shipped without oil, so this step is essential:

• Open the front panel
• Remove dipstick
• Add 500ml SAE 15W-40 oil
• Fill to the upper mark and secure

2. Choose the Right Mounting Location

Carefully inspect your RV or van:

• Ensure clear airflow to the intake
• Avoid chassis, brake lines, and wiring
• Plan routing for exhaust and fuel tank

💡 A poor location can lead to overheating or dangerous fumes entering the vehicle.

3. Mount the Generator

You have two main options:

Fixed Mount:

• Attach to generator frame
• Fit anti-vibration mounts
• Secure to chassis

Slide-Out Mount:

• Attach mounts to base
• Fix to slide-out tray for easier servicing

4. Install the Exhaust System

• Mount exhaust underneath the vehicle
• Use flexi pipe for alignment
• Apply exhaust sealing paste
• Add heat wrap if needed

⚠️ Exhaust gases must exit away from doors and windows.

5. Install the Fuel Tank

The HY3500RVi uses a separate fuel tank:

• Mount in a safe, ventilated area
• Use fuel-grade hoses only
• Ensure the filler cap is externally accessible

👉 Tp: Consider a lockable external fuel filler cap for added security.

6. Fit the Remote LCM Controller

• Install inside your vehicle
• Ensure easy access and visibility
• Connect via supplied USB cable

This allows you to control the generator without going outside.

7. Connect to the Battery

• Use 10mm² copper wires or higher
• Keep cable runs short
• Ensure secure, insulated connections

⚡ Poor wiring = poor performance and potential hazards.

8. Install Main Power Switch

Position the ON/OFF switch:

• Close to the controller
• Easy to access in emergencies

First Start-Up (Quick Checklist)

1. Turn main switch ON
2. Press Power ON on controller
3. Wait for AC OFF display
4. Let engine idle before adding load

✔️ Always connect appliances after startup

How to Avoid Overloading

To protect your generator:

• Add total wattage of devices
• Ensure it’s below 3.5kW max output
• Use formula:
  Watts = Volts × Amps
• Start large motors first

Maintenance Tips for Long-Term Performance

Keep your generator running smoothly:

• Check oil before every use
• Clean air filter regularly
• Inspect exhaust system
• Replace fuel lines every 3 years
• Service every 100 hours / 6 months

The Hyundai HY3500RVi is a powerful, compact solution for RV owners who need reliable off-grid electricity. While installation is more involved than portable generators, the payoff is seamless onboard power wherever you go.

👉 If you’re building a serious campervan or motorhome setup, this generator is best paired with:

• A solar charging system
• Leisure batteries
• Smart power management

Ready to Upgrade Your RV Power?

If you’re serious about off-grid living or long-distance touring, the HY3500RVi is a solid investment - but only when installed correctly.