Best Home Generator Interlock Kits for Safe Power Backup
When it comes to safely powering your home during outages, a home generator interlock kit offers a convenient and code-compliant solution. These kits allow you to connect a portable generator to your electrical panel without the need for expensive transfer switches, ensuring safety and easy operation. Below is a summary of five top-rated generator interlock kits compatible with popular electrical panels and designed for different amperage and spacing requirements.
| Product | Compatible Panels | Amperage | Spacing Between Breakers |
|---|---|---|---|
| Natupal Generator Interlock Kit (SD200A) | Square D QO or Homeline | 150 or 200 Amp | 1 3/8 inches |
| EXCELFU Generator Interlock Kit for Eaton Cutler Hammer | Eaton Cutler Hammer BR Series | 150 or 200 Amp | 1 1/4 – 1 7/16 inches |
| LiftCharger 50 Amp Generator Hook-up Kit | Square D Homeline | 150/200/225 Amp Load Center | Standard panel spacing |
| XMK Generator Interlock Kit for QO/Homeline 100-125 Amp | Square D QO or Homeline | 100 or 125 Amp | 3/4 to 7/8 inches |
| XMK Generator Interlock Kit for Siemens or Murray Panels | Siemens or Murray | 150 or 200 Amp | 7/8 to 1 1/4 inches |
Natupal Generator Interlock Kit for Square D QO or Homeline Panels
This interlock kit is designed for Square D QO or Homeline 150 or 200 amp panels with a spacing of 1 3/8 inches between the main and generator breakers. It provides a reliable safety mechanism to block the utility power when generator power is in use, preventing backfeeding which can be hazardous for utility workers. It enables safe connection and operation of your portable generator to power your home’s circuits during outages.
QYZZRS Generator Interlock Kit Compatible with Square D Panels
The QYZZRS kit fits Square D QO and Homeline 150 and 200 amp panels, requiring a 1 3/8 inch spacing between the main and generator breakers. Installation includes attaching screws before mounting, allowing for precise alignment and functional use. It ensures safety by preventing simultaneous supply from both utility and generator power, directing generator power safely to selected home circuits.
EXCELFU Generator Interlock Kit for Eaton Cutler Hammer BR Series
This kit is tailored for Eaton Cutler Hammer BR Series 150 and 200 amp panels with a spacing range from 1 1/4 to 1 7/16 inches. It features a single handle horizontal throw breaker design for secure and efficient backfeeding prevention. The kit is a cost-effective and safe solution for keeping essential home circuits powered during emergencies, while protecting utility workers.
LiftCharger 50 Amp Generator to House Hook-Up Kit
This comprehensive 50 amp hook-up kit includes a generator cord, power inlet box, panel interlock kit, and a circuit breaker, compatible with Square D Homeline 150/200/225 amp load centers. It supports portable generators with output from 9,000 to 15,000 watts, offering a secure and convenient way to power select home circuits without pre-wiring or costly transfer switches. The kit is designed for safe operation and compliance with electrical codes.
XMK Generator Interlock Kit for Square D QO or Homeline 100/125 Amp Panels
Compatible with Square D QO or Homeline 100 or 125 amp panels, this interlock kit requires a 3/4 to 7/8 inch spacing between breakers. It provides a safe method of connecting portable generator power directly to your home’s electrical circuits, preventing the risk of backfeeding while ensuring you maintain power during outages. This kit is especially suitable for smaller panel amperages.
Buying Guide for Home Generator Interlock Kits
Selecting the right generator interlock kit is critical for safety and effective backup power. Here are key factors to consider before purchasing:
Panel Compatibility
Each interlock kit is designed to fit specific types and brands of electrical panels, such as Square D QO or Homeline, Eaton Cutler Hammer, Siemens, or Murray. Confirm your panel’s brand and model before buying to ensure compatibility.
Amperage Rating
Generator interlock kits come with varying amperage ratings ranging typically from 100 amps up to 225 amps. Match the kit to your panel’s main breaker rating for safe and effective operation.
Breaker Spacing
Check the spacing between your panel’s main breaker and adjacent branch breakers. Common required spacings include 3/4 to 7/8 inches, 1 3/8 inches, or 1 1/4 to 1 7/16 inches. Incorrect spacing will prevent proper fitting and compromise safety.
Installation Requirements
While interlock kits are designed for DIY installation, it requires careful handling. Follow manufacturer guidelines and consider hiring a licensed electrician to ensure code compliance and safe connections.
Included Components
Some kits provide additional components like generator cords, power inlet boxes, circuit breakers, and mounting hardware. Kits with these inclusions offer a complete solution, saving time and added purchases.
Safety Features
The interlock kit must provide a fail-safe way to prevent simultaneous power flow from utility and generator, avoiding dangerous backfeeding and ensuring the safety of utility workers and your home electrical system.
Power Needs and Generator Size
Select a kit compatible not only with your electrical panel but also with your generator’s power output capacity, ensuring it can handle the wattage your generator produces.