HB21 135W Portable Solar Panel

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  • $449.00
  • Regular price $550.00
Price incl. GST | Free shipping
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HB21 is proud to bring top-of-the-range SunPower solar cells to the portable solar market. These cells have one of the highest efficiencies on the market, are more durable and even produce power in low-light conditions.

This 135W panel is an easy plug-and-play with all Ecoflow Power Stations or any RV solar system using the standard MC4 connectors.

Folding legs allow for easy positioning with the best orientation towards the sun. Once the sun is down, it folds into a carry case weighing just 3.7kg and can be easily stored away even in tight spaces.

Eyelets all around the panel make it easy to hang the panel on the side or secure it on the roof of your vehicle while stationary.


What can you charge with this panel?

  • Ecoflow River 600 series
  • Ecoflow Delta series - use up to 2x 135W panels in series
  • iForway T-Rex series - add our MC4 to small Anderson adapter
  • Goal Zero Yeti 1000X | 1500X | 3000X - add our MC4 to DC7909 (DC 8mm) adapter
  • Car batteries - add our Win 500 MPPT charge kit
  • RV Lithium, AGM and Deep Cycle batteries - add our Win 500 MPPT charge kit


HB21 135W Solar Panel General info:

  • Maximum Power: 135W
  • Unfolded Dimensions: 152.5 x 56 x 0.4cm
  • Folded Size: 56 x 44 x 2cm
  • Weight: 3.7kg
  • Open-Circuit Voltage (Voc): 26.2V
  • Short Circuit Current (Isc): 6.42A
  • Voltage at Pmax (Vmp): 22.3V
  • Current at Pmax (Imp): 6.06A
  • Solar Cells: SunPower Maxeon Gen 3
  • Surface: Carbon PET
  • Cell Efficiency: 24.40% 
  • Output type: MC4 connector
  • Waterproof: IP X3 water resistant
  • Operation Temperature: -10~60 degrees C



  • 1 x HB21 135W Solar Panel / Carrying Case with MC4 wiring harness

Warranty: 1 year manufacturing warranty


Download Specification Sheet here:

HB21 135W Portable Solar Panel

Customer Reviews

Based on 5 reviews
Honey B.
What a Godsend this is!

What a godsend this was during our 6 day power cut caused by cyclone Gabriel! So glad I decided last minute to get one just before we were hit and that a friend was able to pick it up! Customer service and advice about which one to get was 2nd to none and very much appreciated too!
So easy to use which is exactly what I was hoping for!
Not only was this able to keep our essentials charged, it allowed our ECOFLOW RIVER 600 PRO PORTABLE POWER STATION to stay topped up (even when there wasn’t much sun), which gave us the actual ‘power’ to hook up our water pump to get fresh drinking water for ourselves and others in our community.
I wouldn’t hesitate to recommend this solar panel at all. Even this combo - it did well for us!

Cost effective 135w solar panel

This solar panel is great! One of the best investments I have made this year. Thank you HB21


CPPower 120W Folding Solar Panel

Deane k.
Awesome 😊

So I got the Eco flow River 600 awesome buy.
Went back and brought the Extra Battery and the 120 watt solar panel I’m a happy man awesome service..
Thank you very much I’ll be back😊

Great option for boats!

Bought one of these for my boat that I take on weekend trips, paired with a power pack it's been a great option and been much cheaper than other options! Setup is also much simpler and I can take it anywhere I want by easily disconnecting the setup. Great service! Thank you again!