Error pv overvoltage a087 on BLUETTI EB3A

[aportal1982]

Hello,

I recently bought the ECO-WORTHY 200 Watt Bifacial Solar Panels 2pcs on Amazon for $116. I can use either solar panel to charge my BLUETTI EB3A Portable Power Station | 600W 268Wh but if I used both of them by connecting them in a series I get an error on the BLUETTI that states pv overvoltage a087, and the Portable Power Station doesn't charge at all.

Are the two panels together too strong for the BLUETTI EB3A Portable Power Station? Is there any way to use both panels to charge the BLUETTI, since individually I'm only getting between 85-90 watts from either one of them? I was hoping to connect them both in a series and charge the BLUETTI at something closer to 200 watts.

I included links to the panels and the power station for more details/specs:

BLUETTI EB3A Portable Power Station | 600W 268Wh

BLUETTI EB3A, 40 minutes to reach 80% charged! Just a ultra-portable power station that crazy campers will love.

www.bluettipower.com

https://www.amazon.com/dp/B0CMBXJ93J?ref_=ppx_hzod_title_dt_b_fed_asin_title_0_0&th=1

As well as pictures of the the error I get when using both panels by connecting them in a series, and each individua panel charging the BLUETTI EB3A Portable Power Station.

 

[ejfluhr]

Did you try parallel connecting them? EB3A input is 8.5A so even 18v should get you over 150W.

The solar panel link didn't show voltages but 12v panels usually produce 18v-22v VOC. In series, VOC x 2 will almost certainly exceed the EB3A limit of 28v. If you really want to use those in series, you might try shading each panel in various ways to reduce total voltage below that EB3A limit. I'm not sure I would do that permanently, myself.

 

[mikefitz]

Portable Power Station doesn't charge at all.

The EB3A is a low cost unit with the electronics engineered to be cost effective. The solar charger built into the unit only accepts solar power with a maximum voltage of 28 volts and a maximum current of 8.5 amps, 200 watts. This in a useless specification for readily available panels. 100 and 200 watt panels will have a Voc 20 to 24 volts, and Vmp 17 to 20 volts. This means you cannot use these panels In series due to the 28 volt limit.

The panel kit you have consists of two 100 watt panels, Voc 24.5, Vmp 20.2, Imp 4.95.
Getting 85 to 90 watts from a single panel is impressive.
Although connecting in parallel may exceed the 8.5 amp limit of the unit, its possible this will work OK.
The most power you will get is Vmp x 8.5 amps, 20.2 x 8.5 = 172 watts.