Troubleshooting · Troubleshooting
Why isn't my EON 100/120d charging?
Short answer: Check the outlet, charger connection, and contacts, then allow up to 4.5 hours for a full charge indoors or in shade.
Test the wall outlet with another device, then check the charger LED. It should glow green when the charger has power.
Based on Maytronics support, updated 2026-06-01, rewritten by Poolbots' pool experts. Applies to 1 model. Parts that fix it are below.
The fix
Step by step.
For a Dolphin EON 100 that won't charge, work through these checks in order.
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Step 1Check outlet power
Test the wall outlet with another device to verify that it works. When the charger receives power, its LED should glow green.
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Step 2Check the charger connection and contacts
Check that the charger is firmly connected to the robot. Inspect the charging contacts on both the robot and charger, and remove any dirt or debris.
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Step 3Check the charging conditions
Choose an indoor location or a shaded area for charging. During hot weather, try charging at night to help prevent overheating.
If the battery LEDs blink at the same time, the battery or charger temperature is too high.
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Step 4Give the battery time to charge
Allow up to 4.5 hours for a full charge. Leave the robot connected to the charger throughout that time.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
Replacement parts
Parts that fix this.
This answer comes down to power supplies & chargers. The exact part depends on the model: choose your robot and we open its parts list, or browse the category for every model.
Browse by category:Power Supplies & Chargers All genuine Dolphin parts →
By model
This fix on your robot.
Every model below has its own troubleshooting guide that repeats this fix with the exact parts that fit it. The link opens the guide on this fix.
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