Firman H03652 Review

Introduction: Why I Chose the Firman H03652

I have been using generators for over a decade, both for work sites and for my own camping and RV trips. When I started looking for a dual fuel model that would not break my back or my budget, the Firman H03652 kept coming up in forums and reviews. Everyone mentioned its weight and size, but I wanted to see if it could actually deliver reliable power without the usual headaches of larger machines. So I bought one, put it through my own real world tests, and here is my honest experience.

Let me be clear: this is not a generator for running a whole house or a heavy duty construction site. It is a portable, dual fuel inverter generator rated at 3200 starting watts and 2800 running watts on gasoline, and slightly less on propane. What makes it stand out is the weight. At 130 pounds, it is genuinely easier to move than most generators in its class. I have wrestled with 200 pound beasts before, and this Firman feels like a relief. But light weight often comes with trade offs, and I wanted to find out if those trade offs matter for the average user.

How I Tested It

I did not run this generator in a lab. I used it the way most people would: in my backyard for a weekend project, on a camping trip to power my RV and some lights, and as a backup for a small home office during a planned power outage. I tested both gasoline and propane operation, measured runtime, and paid close attention to noise levels, ease of starting, and how it handled different loads.

Test Setup

For the camping test, I connected it to a 30 amp RV outlet and ran the air conditioner, refrigerator, and a few LED lights. I also used it to charge phones and run a small electric heater at night. For the home backup test, I ran a 5000 BTU window AC unit, a refrigerator, a few lights, and a laptop charger. I used a Kill A Watt meter to track power draw and runtime.

Fuel and Starting

I used fresh regular gasoline and a standard 20 pound propane tank. The generator has a recoil start only, no electric start. I wanted to see if that was a deal breaker for someone like me who is not a bodybuilder. I also tested the low oil shutdown feature by intentionally running it with low oil to confirm it works.

Performance: What It Does Well and Where It Falls Short

Power Output: Honest Numbers

On gasoline, the Firman H03652 delivers 3200 starting watts and 2800 running watts. On propane, that drops to about 2800 starting and 2400 running. That is enough for most RV appliances and a few essential home items, but do not expect to run a central AC or a well pump. I ran my 13,500 BTU RV air conditioner without issue, but it was close to the limit. When the compressor kicked in, the generator strained for a second but held steady. For a smaller 5000 BTU window unit, it was effortless.

The inverter technology is a big plus. The power is clean enough for sensitive electronics like laptops and phone chargers. I measured the output with a multimeter and it stayed within 120 volts plus or minus 2 volts under load. No flickering or weird surges. That is important for RVers who plug in expensive devices.

Runtime and Fuel Economy

Here is where the small fuel tank becomes a real limitation. The tank holds 1.8 gallons of gasoline. At a 25% load, I got about 9 hours of runtime. At 50% load, it dropped to around 6 hours. On propane, a 20 pound tank gives you about 5 to 6 hours at moderate load. That is fine for a day of camping or a few hours of backup, but you will need to refuel or swap tanks if you run it overnight or for a full day.

I wish the tank were larger. Even an extra half gallon would make a big difference. But the trade off is the compact size. You cannot have a huge tank and a 130 pound generator. For my use case, I just carry an extra gas can or a spare propane tank.

Noise Level

This generator is not whisper quiet, but it is not obnoxious either. At idle, it measures around 58 decibels from 10 feet. Under a moderate load, it goes up to about 65 decibels. That is quieter than a lawnmower but louder than a conversation. For camping, it is acceptable. I have used louder generators that annoy neighbors, and this one is polite enough. But if you need dead silence for a quiet campsite, you might want a smaller inverter generator with a lower noise rating.

Starting and Operation

The recoil start is my biggest frustration. It is not hard to pull, but it takes a few tries, especially when cold. I am a reasonably fit person, but I can see someone with less upper body strength struggling. There is no electric start option, not even as an add on. That is a major con for me. On a generator that costs around $500 to $600, I expect at least a simple electric start button. Firman does make models with electric start, but this one is strictly manual.

Once running, it is stable. The dual fuel switch is simple: you flip a lever to choose gasoline or propane. Switching between fuels while running is not recommended, but you can do it when the engine is off. I had no issues with fuel flow or stumbling. The engine starts easily on propane if you bleed the line first.

Build Quality and Value for Money

Construction and Portability

The frame is made of steel tubing with a powder coated finish. It feels solid but not overbuilt. The wheels are small but adequate for smooth surfaces. I rolled it over gravel and grass, and it handled fine, but the wheels will not handle rough terrain like a larger cart style generator. The handle is comfortable and folds down for storage.

At 130 pounds, it is genuinely easy to lift into a truck bed or SUV. I can do it alone, but I appreciate having a second person for safety. The compact dimensions (24 x 18 x 20 inches) mean it fits in the back of my SUV with room for camping gear. That is a huge advantage over bulkier models.

Materials and Durability

The plastic panels are thick and fit well. The control panel has clear labels and a covered outlet for the RV plug. The propane hose is included and feels durable. After several months of use, I have not seen any rust or corrosion. But I do not leave it out in the rain. The low oil shutdown works as advertised, which is a good safety feature.

One thing I noticed: the air filter is easy to access and clean. That is important for long term maintenance. The spark plug is also easy to reach. Overall, the build quality is good for the price point. It is not a Honda, but it is better than some no name brands I have tried.

Value: What You Get for the Money

I paid about $550 for mine. For that, you get a dual fuel inverter generator with clean power, a lightweight frame, and decent runtime. Compare that to a Honda EU2200i, which costs around $1,100 and only runs on gasoline. The Firman gives you more watts and dual fuel for half the price. But you lose the Honda’s reputation for reliability and quiet operation. For me, the value is excellent if you accept the trade offs.

The small fuel tank and lack of electric start are the main drawbacks. If Firman added a half gallon more capacity and a simple electric start, this generator would be a near perfect portable. As it is, it is a very good value for the money.

Who Should Buy the Firman H03652

This generator is not for everyone. Let me break down the ideal user and the person who should look elsewhere.

Ideal User

• RV and Camping Enthusiasts: If you have a small to medium RV or a travel trailer, this generator will run your air conditioner, fridge, and lights. The lightweight design makes it easy to load and unload. The dual fuel option is great because propane is easier to store and does not go bad.
• Budget Conscious Buyers: You want a dual fuel inverter generator without spending over $1,000. This is one of the most affordable options that still has decent build quality.
• People with Limited Strength: If you cannot lift a 200 pound generator, this 130 pound model is manageable. You can roll it on flat ground and lift it into a vehicle with some effort.
• Homeowners with Minimal Backup Needs: If you just want to keep a refrigerator, a few lights, and a fan running during an outage, this generator will handle it. Just be ready to refuel every 6 to 8 hours.

Who Should Skip It

• Whole House Backup Users: You need 5000 watts or more to run a well pump, central AC, or multiple appliances. This generator is too small.
• People Who Hate Pull Cords: If you have arthritis, weak shoulders, or just do not want to deal with recoil start, look for a model with electric start. The Firman H03652 will frustrate you.
• Extended Off Grid Campers: If you camp for days without access to fuel, the small tank will force you to carry extra gas or propane. A larger generator with a 3 gallon tank might be better.
• Noise Sensitive Users: If you need absolute silence at a quiet campsite, this generator is not the quietest. Consider a Honda or Yamaha inverter.

My Verdict: A Solid Portable with Clear Trade Offs

After weeks of testing, I can say the Firman H03652 is a good generator that knows exactly what it is. It is lightweight, compact, and dual fuel. It delivers clean power for RV and camping use. It is affordable. But it is not perfect. The recoil start is a pain, the fuel tank is too small, and the power output is limited.

For my own use, I keep it as my go to camping generator. I pair it with a 20 pound propane tank and a spare gas can. I use it for weekend trips and short power outages. When I need more power for a bigger job, I pull out my larger generator. But for 80% of my needs, the Firman is enough.

Would I buy it again? Yes, but only if I knew what I was getting into. If you are looking for a lightweight dual fuel generator and you can live with the manual start and small tank, this is a great choice. If those things bother you, spend a bit more for a model with electric start and a larger tank. But for the price, the Firman H03652 delivers honest value.

My final recommendation: test the recoil start before you buy. If you can pull it easily, go for it. If not, keep looking. And always keep an extra fuel can handy.