Sirius Force 250 Watt Panels. Is it a SCAM?

  1. Ebay seller - Sirius Force logo.png
  2. Inspecting the panels
  3. Specifications quoted on Ebay
  4. Testing the Facts

I purchase two PV panels from Ebay described as:

12V 250W Flexible Solar Panel Generator Caravan Camping Power Mono Charging Kit

DSP panel


Ebay seller - Sirius Force logo.png Sirius Force

siriusforce 250W panel


Inspecting the panels

On inspection the panels had no labels or manufacture's markings except a barcode:.


I tried to find the barecode by searching the Internet without success. Also, It is not listed on the Australian Clean Energy database of CEC approved PV modules:

Detail of the Solar Panel Validation initiative can be found here:

If anyone has information about the source if these panels I would appreciate an email.


Specifications quoted on Ebay


Testing the Facts

I purchased two panels, so I placed both in direct sunlight near the middle of the day. First, I connected a voltmeter to the leads and tilted the panel to maximise the voltage. Then, I connected an ammeter directly to the leads and also titled the panel to get the maximum current reading. I repeated this for the second panel.

The results for both panels were close to identical: Voltage: 20.5, Current: 4.2 Amps That calculates to 86.1 Watts. Certainly NOT a 250 Watt panel.

Even after making some allowance the ambient temperature, solar cells temperature, solar irradiance, and losses in the tes equipment this panel falls far short of the claimed 250 Watt nominal output.

I would suggest it is nominally a 100 Watt panel.


Glenn Lyons VK4PK
Ver:gnl20191128 - pre published v0.9