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# Is it safe to leave the Dolphin robotic pool cleaners power supply outside in the elements? What happens if there is a thunderstorm?

The Power Supply Unit (PSU) is an electrical device which must be protected from the elements.

It is water resistant, but not waterproof.

Always plug into a Ground Fault Interrupter (GFI) outlet.

Do not allow the power supply to be submerged in the pool or standing water.

We recommend using a Dolphin Caddy to mount the PSU on.