ElectricalDiagnostics & Troubleshooting4HighOwner$ implied
New EV charger shows PE Fault error despite installed grounding rod; need to reduce ground resistance to ≤4 ohms.
No easy way to measure ground resistance or know if bonding multiple rods will achieve the required ≤4 ohms.
47
0
Opp. Score
47
Severity
4High
Willingness to Pay
implied
Added
May 19, 2026
Workarounds Described
- installed a 5ft grounding rod but still getting error
- ordered a longer 10ft rod to try
- considering bonding multiple rods of different lengths together
- can turn off the PE fault error via software but wants proper solution
Implied Software Gaps
- App that tells you exactly what ground resistance is needed and how to achieve it with rod depth and bonding
App Concept
GroundResist Pro
A mobile app that guides users through proper grounding installation for EV chargers, including resistance measurement recommendations, rod depth calculations, and bonding configurations. Connects to a low-cost ground resistance tester accessory (via Bluetooth) to give real-time readings and pass/fail status.
Key Features
- Step-by-step grounding installation wizard with local soil type adjustments
- Bluetooth-enabled resistance meter accessory to measure actual ground resistance
- Bonding multiple rods: calculates optimal spacing and wire gauge based on target resistance
- Regulatory compliance check for local standards (e.g., NEC, Philippine Electrical Code)
Target Users: Homeowners and electricians installing EV chargers in residential and commercial settings
Revenue Model: $14.99 one-time app purchase; optional $79.99 Bluetooth ground resistance tester accessory
Existing Solutions Mentioned
installed 5ft grounding rodordered 10ft grounding rod
Part of App Idea
New EV charger shows PE Fault error despite installed grounding rod; need to reduce ground resistance to ≤4 ohms.Want to go deeper?
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