Honda 664350 EM5000SX 5000-Watt Portable Generator

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If you’re looking for a reliable, powerful, and fuel-efficient generator for home backup or job site power, the Honda EM5000SX should be on your list. 

Built with Honda’s legendary engine technology, this generator combines strength, quiet performance, and premium features like electric start and iAVR (Intelligent Automatic Voltage Regulation). 

This review explains why the Honda 664350 EM5000SX is a favorite for homeowners, contractors, and emergency-preparedness pros.

Also, read >>> Power Up Your Life With Honda Generator 5000 Watt

Quick Verdict

The Honda EM5000SX delivers outstanding performance with 5000 watts of continuous power and up to 7000 watts for startup surges, making it ideal for running refrigerators, well pumps, AC units, and power tools. It’s quiet for its class, easy to start, and built to last. A bit pricey, but you get what you pay for.

Key Features

• 5000 Running Watts / 7000 Starting Watts (iAVR boost for 10 sec)
  
• Honda GX390 Commercial-Grade Engine
  
• iAVR Technology – Maintains stable voltage for sensitive electronics
  
• Electric Start + Recoil Backup
  
• Runtime: Up to 11.2 hours at 50% load
  
• Noise Level: 63 dB at rated load
  
• 4-Wheel Kit & Folding Handle Included
  
• 120/240V Selector Switch for versatility
  
• CO-MINDER® Carbon monoxide detection and automatic shutdown
  

Performance and Power Output

The EM5000SX produces:

• 5000 watts of continuous power
  
• 7000 watts peak with iAVR technology, allowing for surge-demand tools or large appliances
  

This makes it capable of running:

• Refrigerator + freezer + lights + TV + furnace fan
  
• Well pump or sump pump
  
• Microwave and coffee maker simultaneously
  
• Multiple jobsite tools (saws, compressors, drills)
  

Its iAVR system ensures smooth, consistent voltage, even during high start-up loads, making it safe for sensitive electronics.

Fuel Efficiency & Runtime

Powered by a 6.2-gallon fuel tank, the EM5000SX runs:

• Up to 11.2 hours at 50% load
  
• About 8.1 hours at rated load (5000W)
  

This is ideal for overnight outages or full workdays on a single tank.

Noise Level

• Operates at 63 dB at rated load and 58 dB at 50% load
  
• Comparable to a normal conversation
  
• Quieter than many other 5000W generators, making it neighborhood- and campsite-friendly
  

Ease of Use

• Electric start with recoil backup makes it easy for all users.
  
• Fuel gauge, hour meter, and auto low-oil shutoff for maintenance ease
  
• CO-MINDER® tech for safety shuts the unit down if CO levels get dangerous
  
• The wheel kit and folding handle make it portable despite the 232 lb. weight.
  

✅ Pros

• Legendary Honda reliability
  
• iAVR tech handles high-surge appliances with ease
  
• Long runtime on one tank
  
• Quiet for a 5000W generator
  
• Electric start + CO monitoring for added convenience and safety
  
• Durable, jobsite-tough build
  

❌ Cons

• Pricey compared to other 5000W generators
  
• Heavy – though the included wheel kit helps
  
• No remote start option
  

Best Use Cases

• Home backup power during blackouts
  
• Construction sites needing consistent, surge-handling power
  
• RV or camping (where large-capacity power is needed)
  
• Events, food trucks, and outdoor business setups
  

Price & Value

The EM5000SX is a premium model retailing around $2,600- $2,800, but the investment pays off in reliability, power quality, and long-term durability. It’s built to outlast cheaper competitors and deliver when it matters most.

Where to Buy

• Amazon – Fast shipping and easy returns
  
• Home Depot – Carries official Honda stock and accessories
  
• Acme Tools / Northern Tool – Sometimes have deals or free shipping.
  
• Authorized Honda Power Equipment dealers
  

Final Thoughts

The Honda 664350 EM5000SX is a top-tier portable generator that excels in reliability, safety, and raw power. If you’re investing in a generator that must work when it counts, the EM5000SX is worth every penny. 

Whether for your home, business, or job site, it’s a powerful, dependable machine that lives up to the Honda name.

Rating: ★★★★★ (4.9/5)

Best For: Homeowners, contractors, and anyone who needs reliable backup or off-grid power.