RVMP Flex Power 3300i review: our full analysis
Brand: RVMP · Ranked 132nd of 174 · Our methodology
6.5/10 Power5.4 Runtime— Noise8.6 Features7.2 Portability8.9 Watts per dollar5.7 Dotted line: average of the 174 models. Relative scores based on specs, no hands-on testing. Where to buy Today's best priceTypical price: $500–$800 Check best price Affiliate link: As an Amazon Associate we earn from qualifying purchases.Not clearly published by the manufacturer, take with caution: warranty, runtime, EPA compliance.
Pros
- 3,300 starting / 2,700 running watts with a TT-30R RV outlet.
- 59 dB(A) at 23 ft and 46 lb.
- GFCI 20 A duplex, USB, 12 V DC, CO shutoff and parallel ports.
Cons
- 1.5-gallon tank.
- Recoil start only.
- Rated for altitude up to 5,000 ft.
Best for
- Camping, tailgating and small jobs away from an outlet
Specifications
| Type | Gas inverter (inverter: clean power) |
|---|---|
| Running watts | 2,700 W gasoline |
| Starting watts | 3,300 W gasoline |
| Fuel | Gasoline |
| Fuel tank | 1.5 gal |
| Runtime | Not published |
| Noise | 59 dB(A) (manufacturer figure) |
| Weight | 46.0 lb |
| Outlets | 2 × 120 V household outlets (5-20R) · TT-30R 30 A RV outlet · USB ports · 12 V DC outlet |
| Transfer switch ready | No (no 240 V outlet) |
| Start | Recoil (pull start) |
| CO shutoff sensor | Yes |
| Parallel capable | Yes |
| Emissions | Not stated |
| Engine | 149 cc |
| Warranty | 3 years |
RVMP Flex Power 3300i2,700 running W · Gas inverter · typical price $500–$800
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Who is it for?
The RVMP Flex Power 3300i is mostly suited to:
- Camping, tailgating and small jobs away from an outlet.
Power output: running and starting watts
The RVMP Flex Power 3300i delivers 2,700 W continuously and up to 3,300 W for a few seconds to start motors. It handles 11 of the 14 loads on our typical list one at a time; add up the running watts of everything you run together, plus the extra starting watts of the biggest motor. As an inverter, it produces clean power suited to laptops, TVs and furnace control boards.
| Appliance | Running / starting watts | Will it run? |
|---|---|---|
| Wi-Fi router and modem | 20 W / 20 W | ✅ Yes |
| CPAP (no humidifier) | 50 W / 50 W | ✅ Yes |
| Laptop or TV | 150 W / 150 W | ✅ Yes |
| Full-size refrigerator | 700 W / 2,200 W | ✅ Yes |
| Chest freezer | 500 W / 1,500 W | ✅ Yes |
| Furnace blower (1/2 HP) | 800 W / 2,350 W | ✅ Yes |
| Sump pump (1/2 HP) | 1,050 W / 2,150 W | ✅ Yes |
| Microwave (1,000 W) | 1,000 W / 1,000 W | ✅ Yes |
| Space heater | 1,500 W / 1,500 W | ✅ Yes |
| Window AC (10,000 BTU) | 1,200 W / 3,600 W | ❌ No |
| RV roof AC (13,500 BTU) | 1,800 W / 2,800 W | ✅ Yes |
| Circular saw | 1,400 W / 2,300 W | ✅ Yes |
| Well pump (1 HP, 240 V) | 1,000 W / 4,000 W | ❌ Needs 240 V |
| Central AC (3-ton, soft start) | 3,800 W / 5,500 W | ❌ Needs 240 V |
Typical figures; check the label of your own appliances. One load at a time: add up everything you run together.
RVMP Flex Power 3300i2,700 running W · Gas inverter · typical price $500–$800
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Fuel tank and runtime
The fuel tank holds 1.5 gallons of gasoline.
59 dB(A): how loud is it?
The manufacturer rates the RVMP Flex Power 3300i at 59 dB(A), usually measured at 23 feet (7 m) and a light load. That is about the level of a conversation or a dishwasher: acceptable at a campground.
Can you connect it to your house?
Its panel offers 2 × 120 V household outlets (5-20R), TT-30R 30 A RV outlet, USB ports, 12 V DC outlet. It has no 240 V outlet: it runs plug-in appliances through extension cords, not hardwired circuits or a 240 V well pump. The TT-30R outlet plugs straight into a 30 A RV. It is parallel capable: linked to a second compatible unit with a parallel kit, the two outputs combine.
Start type, CO shutoff and warranty
It starts with a recoil (pull) cord. A CO shutoff sensor stops the engine if carbon monoxide builds up around it; it does not replace distance (20 feet from the house) and CO alarms indoors. The warranty runs 3 years (residential use).
Typical price $500–$800: good value per watt?
Relative to its running watts, the RVMP Flex Power 3300i scores 5.7/10 on value: a high price per watt, which its other strengths may justify. Inverters always cost more per watt than open frames: compare it with other inverters. Generator prices on Amazon move a lot, especially before hurricane season: check the current price before you buy.
RVMP Flex Power 3300i2,700 running W · Gas inverter · typical price $500–$800
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Our verdict on the RVMP Flex Power 3300i
The RVMP Flex Power 3300i scores 6.5/10 and ranks 132nd out of 174 generators analyzed. Its strengths: 3,300 starting / 2,700 running watts with a TT-30R RV outlet; 59 dB(A) at 23 ft and 46 lb. It is best suited to camping, tailgating and small jobs away from an outlet.
RVMP Flex Power 3300i2,700 running W · Gas inverter · typical price $500–$800
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Featured in our rankings
Sources
- Official RVMP product page (specifications)
- Amazon.com listing (availability and typical price, November 2026)
Frequently asked questions
Will the RVMP Flex Power 3300i run a refrigerator?
Yes: its 2,700 running watts and 3,300 starting watts cover a full-size fridge, including the compressor's startup surge.
Can the RVMP Flex Power 3300i power a house?
Only plug-in appliances through extension cords: it has no 240 V outlet for a transfer switch.
Does the RVMP Flex Power 3300i run on propane?
No, it runs on gasoline only.
Is the RVMP Flex Power 3300i quiet?
The manufacturer rates it at 59 dB(A), quiet enough for most campgrounds.
RVMP Flex Power 3300i2,700 running W · Gas inverter · typical price $500–$800
Check best price
RVMP Flex Power 3300i6.5/10 · $500–$800
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