A-iPower GXS5000 vs Powermate PM3800

Comparison Overview

Analysis by AJ Quick

Mechanical engineer and founder of RightGenerator

Key takeaways

• A-iPower GXS5000 delivers 4000 running watts and 5000 starting watts for heavier loads
• Powermate PM3800 is about 15 lbs lighter at 96 lbs for easier transport
• Both generators offer similar runtime at 25% load, around 20 to 21 hours
• Both carry a 3-year warranty and run on gasoline only
• A-iPower GXS5000 produces 68 dB of noise, comparable to a vacuum cleaner
• Neither is an inverter generator, so sensitive electronics need extra protection

Best use cases

Choose the A-iPower GXS5000 if you need to keep essential home circuits running during an outage. With 4000 running watts, you can realistically power a refrigerator, a few lights, a sump pump, and a window AC unit at the same time. It's also a solid choice for job sites where you're running a circular saw, an air compressor, or other demanding tools that benefit from the 5000 starting watts. The tradeoff is weight: at nearly 112 lbs, it's not something you'll want to carry far without a wheel kit, and at 68 dB it's noticeably loud, roughly comparable to a vacuum cleaner running nearby.

Choose the Powermate PM3800 if your power needs are more modest and you value easier handling. At 96 lbs, it's about 15 lbs lighter, which matters when you're lifting it in and out of a vehicle regularly. Its 3000 running watts can comfortably handle a refrigerator, some lights, phone chargers, and a fan, making it a practical option for lighter home backup or recreational use at a campsite or tailgate. The 14-hour runtime at 50% load gives you a useful benchmark for real-world use, since most people don't run a generator at just 25% capacity. Unfortunately, noise data isn't published for the PM3800, so you'll want to check user reviews if sound levels matter to you.

Both generators run on gasoline only, so keep stabilized fuel on hand for storage. Neither produces inverter-quality power, meaning you should avoid plugging in laptops or other sensitive electronics directly without a surge protector or separate inverter. And both come with the same 3-year warranty, so long-term coverage shouldn't be a deciding factor between them.

Verdict & recommendation

If your priority is having enough wattage to run multiple appliances or power tools simultaneously, the A-iPower GXS5000's 4000 running watts give it a clear edge. It's the better fit for homeowners preparing for extended outages or contractors needing reliable job site power. If you're looking for a lighter, more portable generator for moderate loads, like keeping the basics running during a short power outage or powering a few items at a campsite, the Powermate PM3800 handles those tasks capably while being easier to move around.

Both generators score similarly overall and share the same warranty length, so the decision really comes down to how much power you need versus how much weight you're willing to manage. Pick the wattage that matches your actual load requirements, and you'll be well served by either unit.