When it comes to safely connecting a generator to your home electrical system, generator interlock devices play a crucial role. These kits allow seamless transfer of power from your generator to select circuits, avoiding dangerous backfeed and ensuring electrical safety. Below is a summary table of top-rated interlock kits compatible with popular electrical panel brands and models, designed for different amp ratings and breaker spacings.
| Product | Compatible Panels | Amps | Breaker Spacing | Brand |
|---|---|---|---|---|
| Natupal Generator Interlock Kit | Square D QO, Homeline | 150/200 Amp | 1 3/8 inches | Natupal |
| EXCELFU Interlock Kit for Eaton Cutler Hammer | Eaton Cutler Hammer BR Series | 150/200 Amp | 1 1/4 – 1 7/16 inches | EXCELFU |
| QYZZRS Interlock Kit for Square D | Square D QO, Homeline | 150/200 Amp | 1 3/8 inches | QYZZRS |
| XMK Interlock Kit for Square D 100/125 Amp | Square D QO, Homeline | 100/125 Amp | 3/4 – 7/8 inches | XMK |
| XMK Vertical Interlock Kit for GE Panels | GE Vertical Main Breaker Panels | 150/200 Amp | 2 1/4 inches | XMK |
Natupal Generator Interlock Kit for Square D QO or Homeline Panels
This Natupal interlock kit is designed for Square D QO or Homeline panels rated for 150 or 200 amps. The kit requires a spacing of 1 3/8 inches between the main breaker and the generator breaker, ensuring proper fit and functionality. Its main function is to prevent both main power and generator power from being active simultaneously, which enhances safety during generator operation. The kit is an excellent solution for avoiding the inconveniences associated with unexpected power outages, allowing safe generator power direction to any home circuit.
EXCELFU Generator Interlock Kit for Eaton Cutler Hammer BR Series
The EXCELFU kit is tailored for Eaton Cutler Hammer BR Series panels, compatible with 150 and 200 amp models. It supports breaker spacing between 1 1/4 to 1 7/16 inches. This interlock kit ensures a safe and cost-effective method to prevent backfeeding from your portable generator. By controlling power flow, it allows you to run household appliances safely during outages or emergencies. The single handle horizontal throw breaker design facilitates straightforward usage.
QYZZRS Generator Interlock Kit for Square D QO and Homeline Panels
QYZZRS offers a professional-grade generator interlock kit compatible with Square D QO and Homeline electrical panels rated for 150 or 200 amps. It requires a 1 3/8 inch spacing between the main and generator breakers. Installation guidance advises pre-attaching screws to align and simulate use, preventing misalignment or malfunction. The design promotes safe connection and seamless generator power transfer to household circuits during power outages.
XMK Generator Interlock Kit for Square D 100 or 125 Amp Panels
This XMK interlock kit is ideal for Square D QO or Homeline panels rated 100 or 125 amps. It fits breaker spacing between 3/4 to 7/8 inches with a single handle breaker throw from left (on) to right (off). It provides a safe method to avoid simultaneous power feed from the main and generator. This makes it perfect for smaller capacity homes or sub-panels that require emergency generator power connection.
XMK Vertical Interlock Kit for GE 150/200 Amp Vertical Breaker Panels
The XMK interlock kit designed for General Electric vertical main breaker panels supports both 150 and 200 amp panels. It requires 2 1/4 inches spacing between main and branch breakers and features a vertical single handle that moves up (on) and down (off). This kit ensures safety and compliance when connecting a generator to vertical breaker configurations, preventing power from feeding back into the grid.
Buying Guide for Generator Interlock Devices
Choosing the right generator interlock device depends on several critical factors to ensure safety and compatibility.
Panel Compatibility
Identify the brand and model of your electrical panel—Square D, Eaton, GE, Siemens, Murray, or others—before selecting an interlock kit. Each kit is specifically designed for certain panel models and breaker styles.
Breaker Amp Rating
Match the interlock kit amp rating with your main panel’s amperage. Kits typically range from 100 amps to 200 amps, corresponding to panel capacity and generator sizing requirements.
Breaker Spacing
Measure the distance between the main breaker and the adjacent branch breaker where the interlock will be installed. Spacing varies from about 3/4 inch up to over 2 inches depending on panel design, and proper spacing ensures secure installation.
Installation and Safety Features
Look for kits that come with clear installation guidelines, including screw placement and breaker locking simulation. The primary safety feature of an interlock kit is to prevent simultaneous utility and generator power feed to avoid dangerous backfeeding.
Panel Orientation and Breaker Handle Movement
Some interlock kits are designed for horizontal breaker handles whereas others fit vertical breaker panels. Ensure you select a kit compatible with your panel’s breaker handle orientation and movement (horizontal left-right or vertical up-down).
Certified and Code Compliant
Verify that the interlock kit meets local electrical codes and standards for generator backfeed prevention. Certified kits provide assurance of quality and safety during installation and operation.
By carefully matching these factors, you can successfully select an interlock device that integrates safely with your generator and electrical panel, providing reliable backup power with peace of mind during outages.