Electrician warns that improper wiring can endanger utility workers

A Maryland resident looking to buy solar-powered backup equipment received a warning that went beyond keeping the lights on: An improper connection to a home's electrical panel could put utility workers in danger.

Here's what to know

In a Reddit discussion, the buyer asked whether installing an Anker solar generator and battery backup required a specialized electrician and whether contractors would install equipment purchased elsewhere.

One commenter who said they had experience installing generators recommended a transfer switch that would disconnect the house from the electrical grid during outages.

"This prevents your voltage from back-feeding up through your transformer and killing a lineman," the commenter wrote.

Another commenter advised that a whole-home setup hardwired to the main electrical panel would require permits and licensed electricians.

More background

After receiving the advice, the original poster made clear that they intended to hire a professional, writing, "I'm only looking for professionals for this but not sure on what type." 

To that end, one commenter explained that, while most electricians could handle wiring a compatible system to a transfer switch or smart electrical panel, permanently mounting solar panels called for an electrician with specialized experience. 

When it came to installation, the commenter who identified themselves as an electrician explained that cost and complexity depend in part on how solar panels and batteries connect to household circuits. That connection brings together two types of electricity: direct current (DC) from the panels and batteries and alternating current (AC) used by the home's circuits.

Going deeper

As for the OP's question about whether electricians would install equipment purchased from someone else, the self-identified electrician's advice was to let prospective installers evaluate the selected gear before hiring them. Contractors might accept the job, but they would want to review the proposed setup first.

In the end, the self-identified electrician offered the OP advice on how to identify a quality electrician, writing, "If they firmly lay out safety boundaries, then they're taking their trade seriously."

Where can I learn more?

Other homeowners have run into similar questions about connecting solar and battery backup equipment safely. These stories cover transfer switch compatibility, restrictions on commissioning batteries, and other grid connectivity challenges. 

• An Ontario electrician questioned whether a Generac transfer switch could support battery backup.

• An installer found wiring fused to metallic flex in an attic, warning solar DIYers to seek help.

• A Powerwall 3 owner needed a manual switch during outages, prompting commenters to question installation.

• A homeowner planning a Franklin battery add-on learned certified installers were required for commissioning.

• A homeowner's solar stopped during outages despite battery backup, as the equipment manufacturer and the installer clashed.

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