How to Cover a Generator in the Rain

Jun 08, 2025

Rain and generators don’t mix—unless you fancy sparks with your s’mores. Short answer: Use a waterproof, ventilated cover designed for your camping generator. Why? Because wet circuits ruin weekends. Keep reading for clever cover tips, DIY hacks, and the best ways to stay dry and powered up.

Understanding the Essentials: Risks and Core Safety Principles

Why Covering a Running Generator Needs Extreme Caution

The Dangers: Electrocution, Generator Damage, and Fire Hazards

Running a generator in wet weather is risky business. Water can get into the electrical parts and cause shorts or even fires. It may also corrode internal components over time. This not only reduces its life but also leads to expensive repairs. Protection is vital.

The Silent Killer: Carbon Monoxide (CO) Buildup from Improper Covering

Improper covering can block airflow and trap fumes. This raises the risk of carbon monoxide poisoning—a deadly, odourless gas. Without ventilation, the fumes can linger dangerously. Never underestimate how quickly CO can build up. Always prioritise safety over convenience.

Champion dual fuel inverter generator on a white background.

Critical Difference: Storage Covers vs. Safe Running Covers

Many people confuse storage covers with operational covers. Storage covers are for when the generator is off and stored. They are not safe for running. Running covers are specifically designed to allow airflow and heat escape. Choose the right one for the job.

Non-Negotiable Safety Practices for Wet Weather Operation

Ensuring Unobstructed Ventilation and Exhaust Flow (Rule #1)

Generators generate heat, especially while under load. Ventilation is non-negotiable. Always allow space around the unit, especially near the exhaust. Avoid tight wrapping or low-hanging material. Heat and moisture buildup will damage the engine and could cause a fire.

Proper Positioning: Distance, Level Ground, and Away from Living Spaces

Set your generator on flat, stable ground. Make sure it’s positioned away from doors, tents, or windows. Sloped or soft ground can lead to tipping or puddle formation. Keep it at least 6 metres from sleeping or living areas. That applies even when using a cover.

Keeping Electrical Outlets and Connections Shielded from Moisture

Water near electricity is a dangerous mix. Use weatherproof extension cords if operating in rain. Raise sockets off the ground if possible. Always inspect plugs and connections for moisture. A small leak can cause a big problem.

The Importance of a Working Carbon Monoxide Detector Nearby

A working CO detector is a camping essential. Place it close to where people are sleeping, not right next to the generator. Test it before every trip. It may be the only warning you get in a CO event. Never rely on smell or sight to detect danger.

EcoFlow generator used by a couple camping beside an RV under a canopy with a scenic forest background.

Practical Rain Cover Solutions & Critical Mistakes to Avoid

Recommended Methods for Safely Covering Your Generator

Purpose-Built Generator Tents/Running Covers (e.g., GenTent)

Running covers like GenTents are made for safe operation in the rain. They offer weather protection and ventilation. Most come with side skirts and frame support. This keeps water out while letting hot air escape. It’s a reliable long-term solution.

Safe DIY Options: Frame & Tarp or Elevated Canopy (Key Design Elements)

DIY shelters can work in a pinch. Use poles or wood to elevate a waterproof tarp. Leave plenty of clearance on all sides for ventilation. Make sure it’s secure and angled to allow runoff. Never let the tarp touch the generator.

Materials: What to Use and What to Avoid for DIY Shelters

Choose flame-resistant, heat-tolerant materials. A heavy-duty waterproof tarp works best. Avoid using plastic sheets or clingfilm. They may melt or block air flow. Reinforce with ropes or bungee cords to prevent sagging.

What NOT To Do: Common and Dangerous Generator Covering Errors

Never Operate Indoors, in Garages, Sheds, or Under Attached Awnings

Rain or no rain, indoor operation is a big no. This includes garages, sheds, or awnings attached to homes. Carbon monoxide builds up quickly in these spaces. Even partially open doors won’t protect you. Always use your generator outside.

Champion inverter generator plugged into a caravan, sitting on grass with a blurred trailer background.

Avoid Fully Enclosing the Generator or Allowing Cover to Touch Hot Parts

Tightly covering a generator can trap heat and moisture. If the material touches the muffler or exhaust, it can ignite. There must be space between the cover and the generator. This applies to both commercial and DIY covers. Airflow is everything.

Ignoring Your Generator Manufacturer's Specific Warnings and Guidelines

Each generator is a little different. Your manufacturer knows its limits. Follow the manual for cover recommendations and operating conditions. Skipping these can void your warranty—or worse, cause damage. When in doubt, double check the specs.

Final Checks & When to Say No

Pre-Rain Inspection: Cords, Grounding, and Fuel

Before any downpour, inspect your setup. Make sure cords are intact and properly grounded. Check fuel caps and valves for leaks. Even minor damage can worsen in the rain. Fix issues before switching on.

Assessing Severe Conditions: When It's Too Risky, Even with a Cover

Sometimes, the best option is not to run the generator at all. Heavy wind, flooding, or lightning can turn a safe setup into a hazard. Covers can help, but they’re not miracle shields. If conditions are extreme, power down and wait it out.

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