I tried the Bluetti EB55 portable power station and the SP200 solar panel

Summer has arrived in many parts of Germany at the latest this week and people are being drawn out again. Be it in the home garden, the vegetable garden, on the beach, camping and much more. Nowadays you always have devices that consume electricity with you. A power bank helps with most small devices, but when it comes to larger devices, you also need to get bigger power sources. Bluetti has a lot in its range and I was allowed to take a close look at the Bluetti PowerOak EB55 Portable Power Station 700 W 537 Wh mobile power storage unit.

Incidentally, it doesn’t just work when you’re on the go, it can also be used as a UPS if the power fails at home and you want to keep your freezer or something alive.

I have the kit here which also includes 200W solar panels to charge the power plant, but more on that later.

Let’s take a look at the connection options first. There is a lot. That is, four USB-A outputs (5V, 3A), one USB-C output (PD 100W), two 220V sockets, one DC output (12V, 10A), one car socket (12V, 10A) and then an input for the solar panels or the mains adapter. The respective outputs can be switched separately using the on / off buttons. 220V outlets deliver a maximum of 700 watts, but are also capable of delivering 1,400 watts, at least for a short time. This is good enough for most external devices. However, I had no problems using it.

There is also a display on the front, which is sadly difficult to read, especially in sunlight, and could have a decent amount of brightness. There you will find, if you recognize anything, the charge level display and which power supply is currently entering or exiting. Unfortunately, the battery display is only available in 20 percent increments, which I don’t think is very useful.

At the head of the Power Station is another Qi charging surface capable of delivering a total of 15 watts wirelessly. Unfortunately, the surface is very slippery, so the smartphone can easily bend. A slight depression may have been installed or rubberized here to prevent slipping.

Last but not least, on the other side there is a large LED that can be switched on in stages. All in all, energy buildup looks good on the outside, unless you have an aversion to blue. But it is also available in black. Here are the technical details, including information on the integrated 537 Wh LifePo4 battery.

Commissioning is explained relatively quickly. Depending on whether the part is loaded or empty upon delivery, you may be ready to go right away or you may need to load it first. It takes 2 to 6.5 hours to charge the battery before it is fully charged. The charging time varies depending on the charging combination. With power supply or solar you have to deal with almost three hours, with power supply and solar there are only two. If the thing is full, you can start. Stand up and connect the devices. Depending on how many devices you connect, you can get by on one charge for a shorter or longer time.

Bluetti provides an efficiency of 0.85, so you can calculate how long you can get there. Let’s say we have a MacBook Pro that is charging at full power, that is, with 100 watts. Based on the 537 Wh available, you have to make the following calculation: 537 Wh * 0.85 / 100 watts = almost 4.6 hours. If you now plug in a slightly more demanding device like an 800 watt electric grill, the oven will literally shut down after half an hour.

So solar panels come into play, because of course you can charge and use at the same time. And the SP200 is equipped with a total of four solar panels and delivers a maximum of 200 watts. So you can counter it. Parts are also installed relatively quickly. Just open the flat unit, open the brackets on the back, align, connect, done. In my test, I didn’t get to 200 watts, even when the sun was fully shining on the panels – the maximum was 180 watts. When charging, the fan starts immediately. It’s not really annoying, but audible.

What remains to be said at the end? All in all, with the EB55 you get a sufficiently powerful energy storage device with a wide range of connection options and a good workmanship. Either way, I’m pretty impressed with the storage. The price is also within the usual market range. The kit with storage and solar costs 1,150 euros. Individually 649 euros or 499 euros are due.

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