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Gregory E. Johnson
Reviewed in the United States on February 8, 2025
Have not used it yet but looking forward to using it soon.
Take-a-little-time
Reviewed in the United States on September 28, 2024
This 40V-D.C., 350W 120V-A.C., 4-port inverter for Ryobi batteries is fantastic. When it arrived, my hubby was like a kid in a candy shop. Because of ongoing utility upgrades, our rural community has frequent power outages. And this inverter will allow us to power an essential item indoors. We currently only have two Ryobi-compatible 40V batteries, but we will get two more soon.The inverter (minus batteries), weighing 3.4 pounds, surprised us with its lightweight. We were also surprised that it produced electronic-sensitive pure sine wave electrical conversion. Batteries simply slide into the four ports and are held in place via the battery's latching system. Currently, we have one Ryobi brand 40V-4Ah battery and one off-brand 40V-6Ah battery. The inverter accepts both batteries without problems.Suppose you use more than one battery, one at 41V and the other at 40V. In that case, the inverter will intelligently operate using the battery with the most voltage until the batteries are the same, thus maintaining an even current draw across all batteries. This feature provides reassurance that the inverter is designed to optimize the use of multiple batteries. The A.C. power receptacle is designed to accept just about any type of plug style. For U.S. users, it accepts three-prong and two-prong plugs. It also provides D.C.-12V and D.C.-5V.The back-lit display shows the battery voltage, the battery or batteries currently being used, and the Wattage drawn for the A.C. and D.C. voltages. You can power A.C. and D.C. items simultaneously, and the Wattage from both will be combined. So, suppose you're operating a 120V-A.C. fan at 40 Watts and charging a cell phone at 5V-D.C. at 7 Watts. In that case, the display will show 47 Watts plus the low current draw of the inverter, typically around 1-7 Watts. So, in this scenario, it will display somewhere between 48 to 54 Watts.Conclusion: According to my grading system, this inverter has exceeded our expectations, so I give it five stars. I recommend it, especially if you currently have Ryobi-compatible 40V batteries. I hope this helps. Thanks for reading!
Astro
Reviewed in the United States on November 17, 2024
I purchased this product with great excitement, expecting it to fill a key role in powering my astrophotography rig. My setup draws about 65 watts, and with four fully charged 40V 6ah Ryobi batteries, I anticipated having more than enough power—even accounting for the inefficiencies of converting 40V DC to 120V AC. However, during testing, I uncovered significant inconsistencies in how the unit utilized the batteries, which made it unsuitable for my needs.Despite starting with all four batteries fully charged and within 0.05 volts of each other, the unit would only draw power from two or three batteries at a time. And when using the AC output, the low-voltage protection would kick in as soon as those two or three batteries dropped to around 31.5 volts, cutting power to all connected devices momentarily (as advertised). However, when power resumed, the unit would then draw exclusively from the other, fully charged batteries, draining them rapidly. This uneven discharge behavior resulted in unreliable functionality, rendering the device unusable for my purposes. After a week or two of testing various scenarios, I ultimately returned the unit.The most frustrating part—and the reason for my 2-star review—is that because of it's inability to properly utilize all 4 batteries at once the actual performance fell drastically short of what the numbers suggest. Here's the breakdown:- I have four 6Ah 40V Ryobi batteries, which provide a total capacity of 40V * 6Ah = 240 watt-hours per battery. With four batteries, the total is 960 watt-hours.- Accounting for a 15% AC inversion loss (960 * 0.85), I should have about 816 usable AC watt-hours.- My rig only draws 65 watts, meaning I should theoretically get 816 / 65 ≈ 12.5 hours of runtime.However, due to the uneven battery usage—sometimes pulling from only two or three batteries instead of all four—the actual runtime was only about 5 hours. The worst part, when the low-voltage protection kicked in, it caused a hard shutdown of my astrophotography rig. This interrupted my setup, forcing an onboard PC and tracking software to reboot, which effectively ruined my night of observation. For a system that needs consistent and reliable power, this functionality was unacceptable.If you’re using this product for basic tasks—such as powering a box fan and a few lamps, maybe a cpap—it may work for you. In my testing, it powered a 165w load for about 5 hours. However, I did need to monitor the batteries closely, as they did not drain evenly.I don’t like leaving negative reviews, but I felt it was important to share this honest feedback. This product was a major letdown for my needs, and I hope this information helps others make an informed decision.
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