I have a 300w grid tie invertor, can this (or 3 of them) connect directly to it?

Yes it can, connect three of these in parallel and your grid tie inverter would need to accept 12V panels which can output up to 18V.

The quoted optimum quoted is 2.71a for 50W panel, but what should I expect on a sunny and cloudy day?

Most of the time these ratings are based on 1000W/m^2 sun output. This is typically only achievable in hot places like near the equator. There are calculators online to calculate panel efficiency based on your geographical location and the time of year.

Which cable connecting kit do i need for 3 of these please anyone??

You do get a 3 connection to one cable on here. It will take 3 leads for 3 solar panels 12v down to one 12v cable and in to your inverter or usb converter

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Renogy 240 Watt ShadowFlux Anti-Shading Solar Panel N-Type, 2PCS 120W Solar Panels 12 Volt 16BB, 25% High-Efficiency PV Module for RV Marine Rooftop Farm Battery,Black

Renogy 240 Watt ShadowFlux Anti-Shading Solar Panel N-Type, 2PCS 120W Solar Panels 12 Volt 16BB, 25% High-Efficiency PV Module for RV Marine Rooftop Farm Battery,Black

Product ID: 532874344

Details

Brand
Renogy
Product dimensions
105.2L x 57.8W
UPC
840315255487

⚡33.7V open-circuit voltage

☀️25% efficiency power boost

🛡️IP67 weatherproof durability

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€ 542.40

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Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Harness the sun’s power, even when it hides!

COMPACT YET MIGHTY - 10% smaller footprint than typical panels, perfect for sleek RVs and tight rooftops.
PLUG PLAY CONVENIENCE - Includes easy-connect solar connectors and junction box for hassle-free setup.
POWER THROUGH THE SHADOWS - ShadowFlux tech maximizes output even in partial shade—never miss a watt.
LONG TERM ENERGY ASSURANCE - 25-year warranty guarantees 80% power retention—invest in decades of clean energy.
BUILT TO BRAVE THE ELEMENTS - IP67-rated protection means relentless performance rain or shine, hail or snow.

The Renogy 240W ShadowFlux Anti-Shading Solar Panel set features advanced N-Type 16BB cells delivering 25% efficiency with innovative ShadowFlux technology to maintain high output in shaded conditions. Compact and lightweight, these IP67-rated panels are engineered for durability and portability, ideal for RVs, marine, and rooftop use. Backed by a 5-year material warranty and 25-year performance guarantee, they ensure reliable, long-lasting clean energy.

Specifications

ASIN	B0GQSMFKWM
Best Sellers Rank	8,341 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 51 in Monocrystalline Solar Panels
Brand	Renogy
Country of Origin	China
Efficiency	24.8%
Included Components	Solar connectors, Junction box
Included components	Solar connectors, Junction box
Item Dimensions L x W x H	105.2L x 57.8W x 3H centimetres
Manufacturer	Renogy
Material	Monocrystalline Silicon, Tempered Glass, Aluminium, Polymer
Maximum Power	240 Watts
Maximum power	240 Watts
Model Number	ShadowFlux Anti-Shading Solar Panel
Part Number	2PC-120W ShadowFlux N-Type 16BB
Product dimensions	105.2L x 57.8W x 3H centimetres
UPC	840315255487
Unit Count	1.0 count

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