Can You Run a Generator in the Rain?
Last updated:
Fact-checked by Marcus Hayes, Master Electrician (License #CA-EL-89241), 15 years generator installation experience.
Electrical Hazard
Running a generator in rain without a purpose-built cover is dangerous. Water can cause electrical shorts, shock hazards, and permanent damage to the alternator. Never use a tarp or plastic sheet — they trap exhaust and create a CO hazard.
Key Takeaways
- Do not run a generator in the rain unless it is protected by a purpose-built generator tent designed for running operation.
- Never use a tarp, plastic sheet, or enclosed box — these trap exhaust and create a carbon monoxide hazard.
- Solar and battery generators are safe to use indoors during rain because they produce no CO and have no combustion engine.
- Purpose-built generator tents (GenTent, IGAN) are open-sided, fire-resistant, and allow full airflow while keeping rain off the unit.
- If your generator gets wet while running, shut it off immediately and let it dry completely before restarting.
The short answer
No, you should not run a generator in the rain unless it is protected by a purpose-built generator tent
or enclosure. Water can cause electrical shorts, shock hazards, and damage the alternator. If you must
operate in wet weather, use a properly ventilated generator cover designed for running operation —
never a tarp that blocks airflow or traps exhaust.
Why rain is dangerous for generators
Rain is dangerous for generators because water entering the electrical outlets, control panel, or
alternator can cause short circuits, damage the unit permanently, and create a lethal shock hazard
for anyone touching the generator or connected cords. The combination of electricity and water is
especially dangerous because the generator's frame and outlets can become energized.
How to safely run a generator in wet weather
To safely run a generator in wet weather, use a purpose-built generator tent (also called a generator
shed or running cover). These are open-sided, fire-resistant structures that keep rain off the
generator while allowing full airflow and exhaust dispersal. Popular brands include GenTent and
IGAN. The generator must still be placed at least 20 feet from the house.
Frequently Asked Questions
Can you run a generator in the rain?
No, you should not run a generator in the rain unless it is protected by a purpose-built generator tent or enclosure. Water can cause electrical shorts, shock hazards, and damage the alternator. If you must operate in wet weather, use a properly ventilated generator cover designed for running operation — never a tarp that blocks airflow or traps exhaust.
What happens if a generator gets wet?
If a generator gets wet while running, water can short the electrical outlets, damage the alternator, and create a shock hazard. The generator should be shut off immediately, allowed to dry completely, and inspected by a qualified technician before restarting. Always use a generator tent in wet weather.
Can I cover my generator with a tarp in the rain?
No. A tarp traps heat and exhaust, creating a fire hazard and carbon monoxide risk. Use only a purpose-built generator tent or enclosure that is designed for running operation — these are open-sided or vented to allow airflow and exhaust dispersal while keeping rain off the unit.
Are solar generators safe in the rain?
Solar and battery generators (like EcoFlow, Bluetti, and Jackery) are safe to use indoors during rain because they have no combustion engine and produce no CO. However, the solar panels used to recharge them are weather-rated and can be left in the rain — most are IP67 or IP68 rated. The battery unit itself should be kept dry indoors.
How do I protect my portable generator from rain?
Use a purpose-built generator tent (also called a generator shed or running cover). These are open-sided, fire-resistant structures that keep rain off the generator while allowing full airflow and exhaust dispersal. Popular brands include GenTent and IGAN. Never use a tarp, plastic sheet, or enclosed box.
Can I run my generator under an awning or carport?
A carport or open-sided awning can provide rain protection if the generator is still at least 20 feet from the house and the exhaust is directed away from any openings. A fully enclosed porch or garage is never safe, even with doors open. The key is full airflow on all sides with no exhaust trapping.