The two positives make a negative and the two negatives make a positive?

NO. The two positives connect to the connectors and the connector has a positive connector out. The positive and negative do not change.

I have ten 12 v 100 watt 4.5 amp panels I need to set up in parallel that will put out 45 amps will these work

No. These are rated at 30 amps max. Why in the world would you want 45 amps instead of a higher voltage (series/parallel combo)? 45A will require 4/0 wire or larger from your array. It will have an insane voltage drop if you go with less for over a run of 8 feet or so. Re-engineer your design.

I have 2 Strings of 3x280w 40voc panels in series. Can I parallel the two strings using these branch connectors?

The connectors will work. Just be sure the input voltage and amperage is right for you application. Take the panel specs and equipment specs to a good solar installer or electrician if you aren’t sure.

After 2days use one of the male ends kinda like melted any ideas why ?

Slightly loose connection or too many amps.

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🔌 Connect smarter, power stronger — don’t get left in the dark!

LONG TERM RELIABILITY - Corrosion-resistant copper contacts with flame-retardant UL94-VO housing
PLUG PLAY SIMPLICITY - Quick assembly and removal without extra tools—save time, avoid hassle
POWER UP WITH CONFIDENCE - Handles up to 30A and 1000V for robust solar connections
CERTIFIED SAFETY ASSURANCE - CE and TUV certifications ensure top-tier quality and peace of mind
BUILT TO BRAVE THE ELEMENTS - IP67 waterproof and UV-resistant for all-weather durability

The LINKPAL Branch Connectors pair offers a durable, easy-to-use solution for parallel solar panel connections. Featuring a 30A current rating, 1000V voltage capacity, and IP67 waterproofing, these connectors ensure stable, corrosion-resistant performance in harsh environments. Certified by CE and TUV, with quick assembly and UV-resistant materials, they deliver reliable, long-lasting solar connectivity for professional-grade installations.

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Colour	Black
Connector Type	[Standardized]
Contact Material	Copper
Insulation Material	Polyphenylene oxide + Polyamide (Nylon)
Terminal	Crimp Terminal
Brand	LINKPAL
Specification Met	CE, TUV
Maximum Voltage	1000 Volts
Net Quantity	1 Count
Manufacturer	LINKPAL
UPC	736900423167
Country of Origin	USA
Item model number	5
Package Dimensions	13.2 x 6.3 x 2.5 cm; 103 g
ASIN	B07HGMN7D9

LINKPAL Branch Connectors Connectors Y Connector in Pair MMF+FFM for Parallel Connection Between Solar Panels … (1 Pair)

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