HARSKIYER 2 Pack Generator Grounding Plug, Neutral Ground Bonding Plug for Portable Inverter Generator Surge Protector with Floating Neutral for RV Generator Accessories, Open Ground Error

Why I reached for a bonding plug

Portable inverter generators and power stations are wonderfully quiet, efficient, and compact—but many ship with a floating neutral. That’s fine for standalone tools, but it can confuse RV energy management systems (EMS), surge protectors, and transfer gear that expect to see a single, intentional bond between neutral and ground. In practice, that often shows up as a persistent “open ground” or “no neutral/ground bond” warning and a refusal to pass power. I ran into exactly that with my camper’s surge protector and again with a home backup setup using a power station. The fix was simple: a neutral-ground bonding plug.

Over the past few months, I’ve been using the HARSKIYER grounding plug (sold as a two-pack). It’s a small accessory, but it solved two real problems for me: it let my RV’s surge protector accept power from a Honda inverter generator, and it allowed a Bluetti/EcoFlow-style power station to behave like a bonded source when feeding an RV via the shore cord. Here’s how it performed, what I liked, and what to watch for.

What this grounding plug is—and what it isn’t

Functionally, this is a neutral-to-ground jumper built into a standard household plug body. Inserted into an unused outlet on the generator or power station, it creates the single neutral-ground bond that many EMS/surge devices require before they’ll energize downstream loads. It’s not a surge protector, not a load-carrying adapter, and not a fix for a defective generator. Think of it as a compliance tool to make a floating-neutral source present itself like a “bonded” source to downstream safety equipment.

Specs are appropriate for the job: 10–15 A, 125–250 V, with a stated 2,500 W ceiling. In reality, no appreciable current should flow through the bond in normal operation; the rating simply speaks to component robustness.

Setup and real-world use

Using it is as easy as it gets:

• Start the generator/power station.
• Plug the HARSKIYER bonding plug into one of its 120 V receptacles.
• Connect your surge protector or RV shore cord as usual.

With a Honda EU2200i feeding my travel trailer via a Progressive Industries EMS, I initially got an “open ground” lockout. As soon as I inserted the bonding plug, the EMS cleared the fault and passed power. I replicated the same behavior using a Bluetti AC200 and later an EcoFlow Delta Max as the source for a small RV subpanel. In both cases, the bonding plug satisfied the EMS check, and everything downstream—converter/charger, outlets, microwave—ran as expected.

One side benefit: the plug can help you diagnose a truly open equipment ground. If you insert it and your surge protector still reports an open ground, the generator’s ground path (or the receptacle’s ground blade) may be compromised. In my tests, a cheap extension cord with a broken ground conductor triggered that behavior—useful feedback that saved me time hunting a phantom “generator issue.”

Build and safety notes

The plug’s conductors are phosphor copper, a good choice for spring tension and conductivity. The outer PVC jacket carries a 94-V0 flammability rating, which is reassuring for a device designed to live on a generator panel outdoors. The shell has a lightly frosted texture that makes it easier to grip with cold or gloved hands, and the prongs sit with a positive, snug feel in every 5-15/5-20 receptacle I tried.

I checked for warmth during extended use and felt none; my infrared thermometer never registered more than a degree above ambient on the body. That’s exactly what you want to see—the bond shouldn’t be carrying load current.

Safety-wise, a few reminders:

• Use it only at the power source: generator or power station. Never plug this into a wall outlet.
• Ensure you have only one neutral-ground bond in the system. If your transfer switch or subpanel already bonds neutral to ground, do not use a bonding plug.
• Keep it dry. The plug will be sitting in an outdoor receptacle; treat it like any cord cap and protect it from rain and spray.
• Jobsite GFCI rules vary. Some OSHA-compliant setups and GFCI-protected generators may trip or prohibit neutral bonding adapters. Know your requirements.

Performance across different sources

• Honda EU2200i (floating neutral): Cleared EMS “open ground” immediately; no tripping across a full trailer load at ~1,200 W.
• Bluetti AC200-series: Enabled direct RV connection via shore cord. No nuisance trips with the trailer’s onboard GFCI outlets downstream.
• EcoFlow Delta-series: Same positive result. The bonding plug made the power station behave like a bonded source to the EMS; loads ran normally.

In all cases, the plug stayed secure and cool, and I had zero intermittent faults. I also tested continuity across neutral-ground with a multimeter before first use; resistance was effectively zero, as expected.

Where it shines—and where it doesn’t

Strengths:

• RV and emergency use. If your EMS or surge protector blocks power from a floating-neutral source, this solves the handshake problem in seconds.
• Portable power stations. Many high-capacity lithium units are floating; this plug lets them safely interface with RV distribution systems.
• Diagnostics. Useful for distinguishing a true open ground condition from a simple floating-neutral lockout.

Limitations:

• Not a universal fix. If your generator is miswired, damaged, or has a defective receptacle ground, this won’t “repair” it.
• Household/grid applications. Never use a bonding plug in a home receptacle or in parallel with an already bonded transfer switch.
• Minimal labeling. I’d love a bolder “Generator Only—Do Not Use on House Outlets” imprint. It’s clearly intended for generators, but more obvious labeling would help prevent misuse.

Value and the two-pack factor

You get two identical plugs in the package. That’s more helpful than it sounds: I keep one permanently in my generator case and the other in the RV’s electrical kit. It also removes the temptation to cobble together a DIY jumper from a spare plug—this is cleaner, safer, and better built than most homemade versions. While the power rating is somewhat academic for this application, the materials and fire rating inspire confidence.

If there’s one area I’d tweak, it’s clarity in the documentation. The “2500 W” line can confuse newcomers into thinking this is a load adapter. A simple one-pager explaining floating neutral, single-point bonding, and safe use cases would elevate the product for first-time users.

Practical tips

• Label your plug. I added “GEN ONLY” and “N–G BOND” with a paint marker. It reduces the chance someone misuses it.
• Test your cords. If the bonding plug doesn’t clear an open-ground indication, check your extension cord or adapter for a broken ground pin or conductor.
• Know your system. If your transfer switch switches the neutral and leaves bonding at the home service, you generally shouldn’t bond at the generator. When in doubt, consult an electrician.

Recommendation

I recommend the HARSKIYER grounding plug to anyone running an RV or surge-protected setup from a floating-neutral generator or power station. It’s simple, well built, and—used correctly—solves a real compatibility problem that stops trips and emergency backups in their tracks. The two-pack makes it easy to stash a spare, the materials inspire confidence, and in my testing it performed flawlessly across multiple sources. Just treat it with the respect any bonding device deserves: use it only at the generator, ensure you have a single neutral-ground bond in the system, and keep it out of household outlets. Used that way, it’s one of those inexpensive, unsung tools that quietly prevents big headaches.