Which Solar Panels Are Compatible With The Bluetti EB3A/EB55/EB70S Power Stations?
The Bluetti EB3A, EB55, and EB70S are three relatively new portable power stations, also known as solar generators.
Even though they’re new, they’ve quickly grown in popularity and it’s easy to understand why when you take a look at the specifications.
Related Product: Consider the portable, foldable, and waterproof EcoFlow 160 Watt Solar Panel (click to view on Amazon) for your Bluetti power station
They have the features that buyers are looking for, and they’re an excellent choice for not only travelers but also homeowners looking for a battery to have as a backup.
I have travelled full-time in an RV for the past couple of years, and use these type of power stations daily with solar panels.
In this short article I want to share a couple of solar panels that are compatible with the EB3A, EB55, and EB70S power stations.
Solar Panels Compatible With All Bluetti Power Stations
Here are a couple of compatible solar panels.
Note that if it’s a panel that requires the MC4 adapter, you must use the solar charging cable. Bluetti includes an MC4 to 7909 DC adapter with the EB55 and EB70S, but not the EB3A.
The type of cable that is included is an MC4 to 7909 (click to view on Amazon) with a positive MC4 female connector and a negative MC4 male connector.
It’s important that the adapter you have or buy is wired this way, since it won’t be compatible with the panels below otherwise.
Now we’ll take a look at the input limitations of the Bluetti power stations and what you need to know when connecting solar panels.
Specifications – The Input Limits
All of the solar panels I put on the table above are compatible with all of the Bluetti models in the table below.
Not all solar panels on the market are compatible though, and that’s why it’s important to know the charge controller specifications before you buy a panel.
Let’s take a look at the Bluetti models this post is about and what the charge controllers can handle.
What To Think About
Here are a couple of important things to note:
- All of them use the same MPPT solar charge controller that can handle up to 200W.
- Since the Bluetti power stations have charge controller built-in, you should not connect a panel with an external charge controller.
- Only the smallest model does not include the solar charging cable, which is an MC4 to 7909 cable (click to view on Amazon).
- When you choose a panel it’s important that its Voc or Vmp rating does not exceed 28V, then the charge controller will not charge the battery.
- Because of the 28V limit, you should not connect two panels together in series. If you need to connect two panels, do a parallel connection (more on that down below).
- The charge controller will only reach the maximum 200W if your panel outputs 25V and at least 8A, otherwise it will be less than 200W.
How To Connect Two Panels Together For The Bluetti EB Power Stations
Since a series connection is not possible with these power stations, you must use an MC4 Y branch (click to view on Amazon) to connect two panels together.
The Y branch is for panels that use MC4 connectors.
Connecting two panels in parallel will combine the amperages of the panels but keep the voltage the same as if only one panel was connected.
You can use an MC4 Y branch to connect two of the same solar panels together, it’s not recommended to connect two different panels, although it’s possible.
If you’re buying panels with MC4 connectors, I recommend the Geosiry Twin Wire solar extension cable (click to view on Amazon). They come in different lengths and are high quality cables.
For 8mm extension cables I recommend the Electop DC 8mm extension cable (click to view on Amazon).
Can I Connect A Panel From Harbor Freight?
If you have bought a solar panel that use the SAE connector, you must get an SAE to 8mm adapter (click to view on Amazon). This adapter should theoretically work, although I haven’t tested it myself.
Note that it must be a solar panel without a charge controller, since the Bluetti has one built-in.
Frequently Asked Questions
Can you use the Bluetti power station while it’s charging?
Yes, you can.
Can I charge the batteries via the USB C port?
No, the USB C ports on these Bluetti power stations are output only.
How long does it take to charge with solar?
It depends on which power station you have and which solar panel.
A 100W solar panel will output around 70-80W, so a 268Wh power station like the EB3A will need about four hours to charge up (268/75=3.57 hours).
If you max the input, that time will be cut in half.
Can I leave a power station out in the rain?
No, the Bluetti power stations are not waterproof and should not be left out in bad weather.
Some panels are fine to leave out though, but it’s not worth leaving them out since they won’t be producing very many watts if it isn’t sunny.
Do solar panels work in cloudy weather?
Most do, and especially with MPPT charge controllers. The power output will be massively reduced though, and it’s not unlikely that a 100W panel will only generate 10W if it’s very cloudy.
Please leave a comment down below if you have any questions.