Humless Sentinel Portable Lithium Based Generator

I purchased this Humless Sentinel as backup power for power outages and for the eventual major earthquake in the Palm Springs Area (I hope this one doesn't happen). What interested me was the long life lithium based battery and all the controls in one box. I had made a lead acid based battery system years before and have also read many reviews about the negative aspects of using "car/RV batteries". I wanted a clean system that would hold a charge for a very long time and really be ready when the need arises. It's a 50 amp hour system so it is not designed to make up for the loss of power to major appliances, but it runs lap top computers, small TVs, LED/CFL lighting, fans and basic necessities quite well (up to 1000 watts continuous).

This product, although pricey, is well built and performs as described. I also purchased two 90 watt solar panels and some cabling from Humless directly (from their web site at Humless.com), that allow the system to recharge during longer power outages. The panels fully charge the Sentinel in about 4 hours, and are plug and play meaning the twist-on connectors hooked up in seconds without any hassles at all. This means I can use the device during the day and still have some power for the evening hours. I still have the portability and it stores in a small closet space with the solar cables running up to my roof.

The Humless team in Utah was very helpful answering questions during a few telephone calls to verify that coupling the Sentinel to their solar panels along with my "install skills" would get the job successfully done. I'm happy with the purchase and results.

I purchased this for an off grid recharable backup capability in the event of utility failure. As advertised it is limited to 1000 watts max continuous and a charge providing 600 watt hour. The 1000 watt continuous limit means it will not run my 26 cubic foot side by side refrigerator which pulls about 1340 watts full on. It will work for my upright freezer, although the 600 watt hour limit means about 40 minutes of full run time from a charge. As long as you know this going into it, it is excellent. I sucessfully tested it running my whole house gas furnace and calculated it would provide 60 minutes of run time. 15 minute of run reduced charge by about 1/4 so I think my calculations were correct. An easy way to run the furnace was to turn off the circuit breaker to the furnace, make an extention cord with both ends male, plug one end into the Sentinel and the other end into a receptable at the furance (receptical was on the same line as the furnace). Worked fine, but circuit breaker MUST be OFF or you will destroy the unit if power comes back on. The charge limit means LED TV's will run hours longer than LCD, and CFL and LED lights will run hours longer than incandescent. The light weight is a big factor. I checked an acid gel unit that would handle my refrigerator, but it would weigh 200 pounds which is more than I wanted to deal with, even on wheels, and lithium doesn't have to be recharged every two months like other types. Also competition was modified sine wave, not pure sine wave as the Sentinel has. Pure is is better for electronics. I can use my gas generator to recharge it and then have power quietly at night. I also purchased two 145 watt solar panels to connect to the Sentinel through its 12V input Anderson connectors. I haven't tested that yet but expect full recharging within just a few hours.

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Delivery was on time, packaging was great, I have charged the generator multiple times from zero to full charge using my 100 watt Ramsond solar panel and it charges and works beautifully. Well worth the money and I know that when the power grid goes out someday that I can depend on this to power everything in my room all night: a 32 inch Sony TV, lamp, xbox 360, and a laptop as well as charge my iPhone and other devices.

Also I would like to add that the customer services people are great and answered the questions I had as well as mailing me an additional cable that I needed. Very satisfied with the product, company, and customer service.

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I own two of these generators. I brought the first one for a camp trip in Mexico, last spring. After the first full discharge of the battery, It would not fully recharge. It barely charged at all. I thought it was bad power in a Mexico hotel. So when I got back, they sent me another one. I just fully discharged this one last night and, again it is not fully re-charging. It has been charging for 20 hours and is nowhere near fully charged.

The company, located here in Utah, seems to have disappeared or is not responding to any inquiries on my part, so I guess I can forget any warranty hopes.

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