The OUPES Mega 5 is the largest power station in OUPES’s Mega series. It has a bigger battery capacity, bigger inverter output, and bigger body—but it’s not necessarily that much better.
Here at The Solar Lab, we’ve already reviewed the OUPES Mega 1 through to the Mega 4, and we had high hopes for what the Mega 5 could bring to the table. But after testing it out, we found that while it’s certainly big, bold, and functional, it doesn’t offer many new features. Well, aside from an EV charger that honestly left us scratching our heads.
So, is the OUPES Mega 5 a solid option for a budget-friendly power station, or is it a missed opportunity? Let’s break it down.
Before we dive into the details and discuss what we like about it (and where we think it falls short), here’s a quick rundown of the Mega 5’s core specs:
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If you’ve seen or used any of the previous OUPES Mega units, you’ll already know what to expect from this unit. Basically, the Mega 5 looks and feels like a scaled-up version of the earlier models.
The design is simple and clean, but the materials—like the somewhat cheap-feeling plastic casing—still feel on the budget side. We’re actually fine with this, as this is actually a really budget-friendly power station for what it’s capable of.
It’s got the classic OUPES screen, which is decent, but you still can’t really read it from a left angle. The app also works, even if it’s pretty basic in terms of usability.
You get the same layout for the ports, and the same suitcase-style handle and solid wheel setup that we’ve actually come to love from the slightly smaller units in this series. The wheels actually sit above the ground when you have it laying prone, which is nice because it has a really solid feel when you put it down.
It’s also worth mentioning that this is the largest power station we’ve ever had here at The Solar Lab that can only support a 120V output, instead of also having 240V capabilities, like you get with say the Anker SOLIX F3800. That makes it a bit of an odd unit, especially at this size and price point.
While we have some valid criticisms, there are several things we really do like about the Mega 5, including the following:
The 5,040Wh battery paired with a 4,000W inverter means you’ll get over an hour of full-load runtime. While it’s definitely limited by the lack of a 240V output, that’s still solid performance for anyone only needing reliable backup for 120V appliances and devices, like those with an RV, tiny home, camper van, or just basic and essential household loads.
Some units offer a 30A plug without an inverter big enough to support it. That’s not the case here—you can actually take advantage of that 30A plug, which is a big plus for RVers and those living the “van life”.
It’s rare to see dedicated 12V outputs on a large power station, but OUPES has kept one here. That’s great if you want to run something like a 12V DC fridge or other low-draw appliances without wasting power during the DC-AC inversion process. For those living in areas that experience frequent blackouts, pairing this thing with a small 12V fridge or powered cooler could be a really smart move.
The Mega 5 has the solid wheels and a suitcase-style handle we’ve come to expect from the brand, but it also features bump stops so the wheels don’t touch the ground when it’s stationary. As mentioned, it’s surprisingly stable for something weighing over 100 lbs.
OUPES remains one of the more affordable brands on the market, and, on top of that, they even donate 5% of their sales to charity projects that provide power to under-served communities. That’s a big win in our books.
Not only are you getting reasonably well-built power stations at really beginner-friendly prices, the brand itself is one we actually feel good about recommending. At those prices, they don’t need to have a charitable attitude, but it’s awesome that they do.
This is where things start to fall apart. The OUPES Mega 5 comes with a built-in EV charging port, which is really cool, but it only supports 120V Level 1 EV Chargers—which means 16A max at 1,800W. That’s the same speed as plugging your EV into a regular wall outlet at home.
In other words: it’s not faster, you can’t use a newer Level 2 Charger, and you can’t even combine ports to improve charge rates. It’s more of a gimmick than a practical feature. We spent nearly a week testing it and trying to find a solution with OUPES, but in the end, it’s just not that useful.
To their credit, OUPES did tell us they’re planning to release a 240V-capable model later this year—but for now, the EV port feels like an afterthought that doesn’t deliver real value.
We can’t talk about power stations in this class without mentioning the dual Pecron E3600LFP bundle. This package includes:
And the kicker? It’s way cheaper than many single-unit systems of the same size. We recently reviewed this bundle and concluded that it’s the best value on the market right now. If you need 240V or want more flexibility, we’d recommend not even thinking about it and just going with the Pecron bundle over the Mega 5 right away.
While it’s more expensive, the Anker SOLIX F3800 also deserves a mention here. That beast has a 6,000W inverter and expandable battery options. You’re going to spend more, but if you’re shopping for specs and long-term performance, it’s definitely worth a look, especially if you can scoop one up on sale.
If your power needs stop at 120V, the OUPES Mega 5 is a perfectly capable option that’s available at a very reasonable price. It’s got a big battery, a usable inverter, and plenty of ports—including a real 30A plug. For RVs, off-grid cabins, or general home backup (where you don’t need 240V), it will absolutely get the job done.
But for us, the Mega 5 doesn’t offer much that sets it apart from its predecessors, or even its competition. The EV charger is underwhelming. The materials feel cheap. And in 2025, we’re expecting a bit more innovation, especially from a company we’ve praised in the past for offering good bang for your buck.
Basically, we still like OUPES as a budget-friendly brand, and the Mega 5 could be a good fit for some people, but we’d love to see them take more risks, explore new tech, and stop just releasing scaled up old models that bring nothing overly exciting to the table.
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