What do I need to complete my off-grid solar power system ?

You need a solar panel, a charge controller to regulate current, and a deep-cycle battery for storage. For wiring, you will need adapter kit cables (panel to controller) and tray cables (controller to battery) to complete the system.

What does off-grid and on-grid mean ?

On-grid means connected to the power grid. Off-grid means independent of the grid, storing power in batteries for later use, so you are never affected by grid blackouts.

Why is my solar panel under producing ?

Solar panel performance may be hindered for a number of reasons. Most commonly environmental conditions such as indirect sunlight, temperature rise, cloudy sky, and dirt and stain build up on the top glass will cause a reduced power output.

How should I connect solar panels in my electrical circuit (series vs parallel)

Connect in series to increase total voltage (current stays the same), or in parallel to increase total current (voltage stays the same). Combine both for optimum system power output.

How many solar panels do I need ?

First, determine your total power load (Watts × run hours × 1.5-2 safety factor). Size your battery bank based on this capacity, and accordingly decide how many panels or how much power input is needed.

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Renogy Solar Panels 640 Watt N-Type 18BB, 25% High-Efficiency

Renogy Solar Panels 640 Watt N-Type 18BB, 25% High-Efficiency

Product ID: 222373363

Details

Brand
Renogy
Efficiency
High
Item Weight
90.5 pounds
Material
Silicon
Product Dimensions
64.37"L x x

⚡640W total power output

🔋25% high-efficiency N-Type cells

🛡️IP68 waterproof & anti-corrosion

HK$16297

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Description

☀️ Power your future with efficiency and style—don’t get left in the dark!

NEXT GEN N TYPE TECH - Experience cutting-edge 18 busbar design reducing hotspots and boosting efficiency up to 25%, ensuring maximum energy harvest.
POWER THAT OUTPERFORMS - Generate 320W per panel—20W more than standard models, delivering a robust 640W total for your off-grid or rooftop needs.
PLUG PLAY INSTALLATION - Pre-drilled mounting holes compatible with multiple Renogy mounts make setup effortless—perfect for RVs, cabins, and urban rooftops.
BUILT TO BRAVE THE ELEMENTS - IP68 rating and multi-layer encapsulation protect your investment from water, corrosion, and physical damage—durability you can trust.
SMART SAVINGS WITH SOLAR TAX CREDIT - Claim up to 30% back on your solar system costs—turn your eco-conscious upgrade into a savvy financial move.

Renogy’s 640 Watt Solar Panel kit features two 320W monocrystalline N-Type panels with 18 busbars, delivering up to 25% efficiency and superior temperature tolerance. Engineered with IP68 waterproofing and advanced encapsulation, these panels ensure durability and high performance in harsh conditions. Ideal for off-grid and residential use, they come ready for easy installation and qualify for a 30% federal solar tax credit, making them a smart, sustainable energy solution.

Specifications

ASIN	B08D644VFN
Amperage Capacity	8.46 A
Best Sellers Rank	#82,736 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #386 in Solar Panels
Brand Name	Renogy
Connector Type	Solar Panel Connector
Customer Reviews	4.4 4.4 out of 5 stars (143)
Efficiency	High Efficiency
Folded Size	Unfoldable
Included Components	Solar Panel
Item Dimensions L x W x H	64.37"L x 34.65"W x 1.38"H
Item Highlight	2PCS 320W Solar Panels for Homes Rooftops Farms yards sheds Off-Grid Systems, Efficient Power in Less Space, IP68
Item Type Name	Renogy Solar Panel
Item Weight	90.5 pounds
Manufacturer	Renogy
Manufacturer Part Number	2 Pieces
Material Type	Monocrystalline Silicon
Maximum Power	320 watts
Maximum Voltage	24 volts
Model Number	2pcs 320W Solar Panels
Number Of Cells	32
Number of Items	2
Number of Packs	2
Output Voltage	24 volts
Special Features	12v solar panel, 24v solar panel, 320W Solar Power Output, Rigid N-type Solar Panel
UPC	810009715887
Unit Count	2 Count
Upper Temperature Rating	185 °F

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HK$16297

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

2 days ago

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5 days ago

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