I have an opinion that might surprise people in the backup power industry: stop asking what is the best solar generator to buy until you have made a list of the loads you need to keep running. The same advice applies to a UPS. A product is only good when it is sized for what it is protecting, and that is why I ended up using Tripp-Lite UPS systems in my office.
I am the office administrator for a 130-person company. I handle buying for IT, facilities, and maintenance—roughly $200,000 a year across a lot of small orders. Most of my power purchases are not impressive in volume. I buy one UPS battery backup, one extra battery, one transfer switch. I have learned that the suppliers who treat a one-unit order like it matters are the ones I call again. The ones who make you feel small? They do not get the next order, no matter what their brochure says.
The failure that taught me to test everything
Power failures feel rare until they hurt. In 2022, the average U.S. electricity customer had about six hours of power interruptions, according to the U.S. Energy Information Administration. Six hours may not sound like much, but it is plenty of time for a server to shut down badly.
Right before that year's big storm, our network closet had an aging Tripp-Lite UPS. The maintenance crew had moved a rack a few months earlier. Nobody checked the unit after that. I did not do a battery test either. Then a scheduled maintenance outage turned into a longer outage, and the UPS did not come on. I pressed the power button and watched the screen stay dark. After some frustration I searched for 'Tripp Lite UPS not turning on' and found exactly what I should have known: the battery connector inside had come loose, and the battery was too old to hold a charge. The unit itself was fine. I had not maintained it.
Everyone told me to test UPS batteries before an outage. I only believed it after I ignored the advice and spent the next three hours recovering a database while someone from corporate was on hold. (I really should have followed my own checklist.) An expensive lesson. But a useful one.
Why a backup power plan needs layers
That experience changed how I buy. I no longer look for one magic box. I look for layers.
The first layer is a UPS battery backup. It cleans up surges and brownouts and gives you time to shut down safely. For a typical small office, a Tripp Lite UPS battery backup is the closest thing to a no-regret purchase. I do not say that because it is the only brand I trust. I say it because the Tripp-Lite UPS selector and calculator make me type in actual watts and runtime, which means I think about the load before I spend the money.
I did not always follow that process. I remember a cost-per-watt analysis that told me to buy a larger UPS because it looked like a better deal. My gut said the bigger unit did not fit the rack or the actual load. I let the spreadsheet win. The UPS worked, but it was heavier, louder, and its replacement battery cost more than the smaller model's. The data was not wrong. It just measured the wrong thing.
The second layer is a manual transfer switch if you have a generator. In my office, I use an Eaton manual transfer switch. It is not the flashiest part of the system, but it does an important job. It lets the electrician connect a portable generator inlet to the panel and helps prevent the generator from feeding power back into the grid when it is used correctly. The UPS handles the first seconds; the generator handles the hours after that.
The third layer is separate long-term power for low-power remote gear. At one remote water monitoring site, I use a 24V solar battery charger to keep a sensor and small controller running. It is the perfect tool for a location with no utility power and a small constant load. It would be a terrible solution for a server room.
So what is the best solar generator to buy?
When someone asks me what is the best solar generator to buy, I ask a question first: what failure scenario are you planning for?
A solar generator is basically a battery box, an inverter, and a solar charge controller combined in one case. It is not a generator in the usual sense because it does not create power; it stores it. That makes it useful for charging laptops, running lights, or keeping a router alive during a long outage. But if the office network has to keep processing transactions without interruption, a solar generator is not a replacement for a UPS. You still need something that detects the power failure and transfers instantly.
I have seen buying committees do this backward. They buy a large solar generator because it looks future-proof, then discover it has no way to connect to the building's electrical panel or the network rack. Or they buy a UPS without checking what their router and switch actually draw. The result is the same: money spent on a box that does not match the problem.
A note to suppliers, from someone with small orders
I am not a data center. My annual UPS volume is small, and I value suppliers who do not treat that as an inconvenience. Tripp-Lite has been one of those brands for me. The selector and calculator are helpful, but the support matters more. When I needed a replacement battery for an older rackmount unit, the support person did not make me feel foolish for asking about a single part. That is the kind of experience that keeps me loyal.
If you are a small office, hold out for that experience too. Small orders deserve straight answers. Today's small account can be tomorrow's regular one.
What if the goal is going green?
I understand the appeal of solar. If your company wants to reduce its footprint, a solar generator can be a good addition for break room lighting, mobile event gear, or a remote camera. For the network closet that runs payroll, I would still install a purpose-built UPS. That is not brand loyalty; it is physics. Even a premium solar generator cannot match the instant transfer that a UPS provides unless you design the whole system for that purpose. You can be green and practical: use solar for the loads that can tolerate a few seconds of downtime, and use a UPS for the loads that cannot.
The bottom line
Should you buy a Tripp-Lite UPS or a solar generator? My honest answer is: start with your load list, not the product search. Write down every device that needs power, how many watts it draws, and how long it needs to stay up. Then choose a UPS battery backup that fits the critical load. Add an Eaton manual transfer switch if you have a generator. And if you truly need solar for a remote site, use a small 24V solar battery charger instead of overbuying a portable power station.
My opinion has not changed after years of buying power gear. The best backup power system is the one that turns on when you need it. Everything else is just marketing.
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