DOKIO 300W

[willywizz]

I had purchased

DOKIO 300W 18V Portable Solar Panel Kit Folding Solar Charger with 2 USB Outputs for 12v Batteries/Power Station AGM LiFePo4 RV Camping Trailer Car Marine​

also I have EF ECOFLOW Portable Power Station DELTA 2, 1024Wh with LiFePO4 (LFP) Battery.
when I hook the panel to my power station and the middle day sun is up as you see in the picture I only get the most is 150W input I never have it reach above 160W. and I tried both panel separate times and I still get the most 155W
So how is it those panels sold as 300W and I can't get that in the middle hot day.

 

[sunshine_eggo]

Are you using the charge controller that came with the panel kit, are are you connecting the panels directly to the Delta2?

 

[willywizz]

I am using the cable directly from the solar panel to the power station Delta2. The connector from the panel is SAE and the connection to Delta2 is XT60 so I used the cable that came with panel 9.8FT cable (SAE to XT60)Picture is enclosed

 

[sunshine_eggo]

When you have the cable plugged into the panel, what voltage do you measure at the XT60 connector?



With Delta 2 has a maximum input current of 15A, so you'll never get that last 10%, i.e., you'll be limited to about 18V * 15A = 270W out of that 300W panel.

That also requires it to be high noon, perfectly perpendicular to the sun, no shading, and the cells to be at 25°C.

In actual real world favorable conditions, I would expect you to get about 220-240W at high noon, perfectly perpendicular, unshaded. However, the unit will only take what it needs, so if the battery is nearly charged, it will cut back on the PV.

Assuming it can charge and discharge at the same time, if you apply a > 300W load, you can ensure you're getting the max out of the panel.

 

[GXMnow]

In your picture, I can see the cable hanging in front of a few cells on the left middle panel. That is enough to knock the power down quite a bit.

Also the panel angle does not look like they are faced flat to the sun.