EB3A with generic Solar Panel

Hi guys,

I understand that the EB3As MPPT operates from 12-28VDC and can accept a max of 8.5A.
I am trying to pair a solar panel to charge the EB3A during the day via the MPPT input.

At what voltage (12/18/24VDC) or current does the EB3A switch from 100W to 200W charging on the MPPT?

The problem comes trying to find a solar panel the MPPT input. Open Circuit voltages for 200 panels are higher than 28VDC. I have the following choices available:

  1. 2 x 12VDC 100W panels in series to get 24VDC - I am aware that the EB3A will charge at 200W with 24V batteries.
  2. 1 x 18VDC 200W panel - I am unsure if the EB3A will charge at 200W on this.

Alternatively, is there an easy way to step down a high power panel (200w) to 28VDC for the MPPT?

The EB3A MPPT has 3 restrictions:
200W max, 28V max, 8A max

So in order to get 200W, you will need around 24-25V at 8A.

There isn’t any special step in the voltage. The max power at any voltage will come at around 8A. So if you give it 12V, max power is around 100W. 20V will give 160W and 24v will max out around 200W

For max solar power, try to find a solar panel with Voc around 26V (no higher than 28v).

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I’m looking for budget portable solar panels for the eb3a…any sugges

Im looking for budget portable solar panels for the eb3a…any suggestions?

@Blinkster Thank you for your inquiry regarding pairing a solar panel with your EB3A. Our technical team has provided some helpful information and suggestions.

Firstly, we recommend purchasing a PV200 solar panel as it has an open-circuit voltage of 26.1V, which is below the required voltage of 28V for the EB3A. This panel can provide up to 200W of charging power to your EB3A.

Alternatively, you can use your first option of connecting 2 x 12VDC 100W panels in series to get 24VDC. This will enable the EB3A to charge at 200W with 24V batteries. Your second option of using a single 18VDC 200W panel is also possible but the charging power will be limited to a maximum of 153W (18V * 8.5A). Unfortunately, there is no simple way to step down a high-powered 200W panel to 28VDC for the MPPT.

We hope that this information is helpful. For more details on our products, please visit our website at https://www.bluettipower.com/.

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Thank you Admin,

I plan to go the 2 x 12V Solar route in the interim.
I am looking at future proofing as well with 24V batteries for storage and a Victron Blue Solar MPPT charge controller. Can you advise on the below proposal?

Solar panels > Victron Blue Solar MPPT Charge Controller (24VDC batteries) with the DC load output going straight to the EB3A MPPT.
From what I understand the load output will be 24VDC, 10A and the EB3A will limit the input current to 8.5A. I will achieve 200W charging this way.

@Blinkster Thank you for your update. Your proposal sounds feasible. But the only thing to be aware of is that this type of setup requires the customer to DIY the wiring and be very careful to ensure the correct positive and negative connections.

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One of the great things about Bluetti devices is that they accepts standard solar connections. Unlike some other brands which have a special connector pressuring you to use their own overpriced panels.

Is there any reason to choose the PV200 over the SP 200? As far as I can tell the SP cost $100 less.

@yarp7584 The PV model is more updated than the SP model, with relatively better craftsmanship, so naturally, the cost is higher.

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Its also wired differently. With PV200 you have less loss when its shadowed on some parts of the panel.

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It’s not. The MPPT part only starts at around 14V.
Its not tracking the maximum power point below this and its not pulling mush current.

You can get Panels with around 31V and waist a view volts with a voltage limiter

I would just go for a proper 150V mppt controller and “24V” Lifepo4 battery.

You can then charge your EB3As from the external battery and solar cell

I do not understand the problem.
Why not taking 3 panels with 24V/200W in parallel connection?
You’ll definitely have your 200W whatever the weather
in the entrance and the machine it doesn’t matter because
It only consumes a maximum of 200W anyway (overpaneling).

Ich verstehe das Problem nicht.
Warum nicht 3 Panele 24V/200W parallel
Da hat man bei jedem Wetter sicher seine 200W
im Eingang und der Maschine ist das egal, weil
sie sowieso nur max. 200W aufnimmt (overpaneling).

This shows the input voltage/charging rates for the eb3a. Anything over 24v/8amps will allow you to get the max input for the unit.

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Thanks for the information.
I still have an AC300 with 4 B300s.
What are the charging rates for this device on PV1 and PV2 and on a B300 each?

Danke für die Information.
Ich habe noch ein AC300 mit 4 B300.
Wie sind die Laderaten für dieses Gerät an PV1 und PV2 und an jeweils einem B300?

Sorry @Akel, I dont have those units or batteries to get data for.

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