RVPOZWER (Brand+) Store via AliExpress [aliexpress.us].
RVPOZWER 300W N-Type Monocrystalline Solar Panel 25% High Efficiency for RV Off-Grid $119 + Free Shipping from US warehouse.
Quantities Available:
- 300W 1 Piece $118.8 with coupon for $15 off JJY15K.
- 300W 2 Pieces $214.6 with coupon for $35 off USSS35.
- 300W 3 Pieces $325.2 with coupon for $55 off USSS55.
Key Specs:
- Power: 300W maximum output with 25% high conversion efficiency.
- Cell: N-Type half-cut cells with 10BB (busbar) design for better performance.
- Durability: Tempered glass, anti-corrosion aluminum frame, and IP68 connectors.
- Weatherproof: Withstands 2400Pa wind load and 5400Pa snow load.
- Size: 30.1" L x 53.1" H x 1.18" W (approx. 76.5 x 134.9 x 3 cm).
- Weight: 26.67 lbs (12.1 kg), easy to handle and install.
- Installation: Pre-drilled holes and pre-assembled cables for quick setup.
- Use: Ideal for RV, home rooftop, boat, cabin, and off-grid power systems.
Note: You must be signed into your AliExpress account and have your address added to your address book to add items to your cart and place an order. You may have to manually type in the promo code to apply it at checkout. Price may fluctuate slightly with currency exchange rates.
https://www.aliexpress.us/item/32...02444.html 
Leave a Comment
7 Comments
Sign up for a Slickdeals account to remove this ad.
OTOH, it's same size as a 200W Newpowa 10BB so it's possible even the 245W is phony.
https://www.amazon.com/Newpowa-Mo...B07VBL7XKV
https://ae-pic-a1.aliexpress-medi...36489k.p
Our community has rated this post as helpful. If you agree, why not thank HappyFog3421
The advertised specs for the 300W panel are fraudulent. You can prove this using Standard Test Conditions (STC), which measures solar irradiance at $1000 \text{ W/m}^2$.
- Dimensions: $1340 \text{ mm} \times 670 \text{ mm}$
- Surface Area: $0.8978 \text{ m}^2$
The total amount of raw solar energy physically hitting a panel of this size is:$$0.8978 \text{ m}^2 \times 1000 \text{ W/m}^2 = 897.8 \text{ W}$$
To output 300W of electrical power from 897.8W of raw sunlight, the panel would require a module efficiency of:
$$\frac{300 \text{ W}}{897.8 \text{ W}} = 33.4\%$$
The theoretical physics limit (Shockley-Queisser limit) for single-junction silicon solar cells is ~29.4%, and the absolute best commercial panels on the market today max out around 23% to 24%. At a realistic 21% to 22% module efficiency, a panel of this physical size will produce a maximum of 185W to 195W.
This is simply a 200W panel relabeled as a 300W panel.
Also, read online reviews about actual watt output. A lot of lesser reputable companies will claim 300 when it's only 200-220 actual measurable output.
Also, read online reviews about actual watt output. A lot of lesser reputable companies will claim 300 when it's only 200-220 actual measurable output.
https://share.temu.com/ar2P7Ac56GC
Leave a Comment