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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☀️ Power your freedom with solar confidence!

SHADE NO PROBLEM - Bypass diodes minimize power loss in low-light or shaded conditions, maximizing your energy harvest.
LONG TERM PEACE OF MIND - Backed by a 25-year power output warranty ensuring 80% efficiency even after decades.
PLUG PLAY INSTALLATION - Pre-drilled holes and compatibility with multiple Renogy mounts make setup effortless and fast.
BUILT TO BRAVE THE ELEMENTS - Withstands high winds (2400Pa) and heavy snow loads (5400Pa) for decades of outdoor use.
POWER THAT KEEPS YOU MOVING - Reliable 50W monocrystalline panel delivers consistent energy for your off-grid lifestyle.

The Renogy 50 Watt 12V Monocrystalline Solar Panel is a compact, durable, and highly efficient energy solution designed for motorhomes, boats, caravans, and off-grid setups. Featuring advanced encapsulation, corrosion-resistant framing, and IP65-rated protection, it delivers reliable power with minimal performance drop in shade. Easy to install and backed by a 25-year warranty, it’s engineered to keep your adventures powered sustainably for decades.

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Manufacturer	Renogy
Part number	RNG-50D-SS
Item Weight	3.5 kg
Product Dimensions	50.9 x 58.1 x 3 cm; 3.5 kg
Item model number	RNG-KIT
Size	50W
Style	Compact
Material	Monocrystalline Silicon
Voltage	12 Volts
Wattage	50 watts
Maximum power	50 Watts
Item Package Quantity	1
Included components	1X 50W Solar Panel
Batteries included?	No
Batteries Required?	No

Renogy 50 Watt Solar Panel 12 Volt Monocrystalline Module PV Charger for Motorhome, Garden, Boat, Caravan and Off-Grid Applications

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