4 to 1 Solar Y Branch Connectors MFFFF + FMMMM Pair
Sold by Renogy UK
From £24.99
Renogy UK's price when we last checked, on 2 September 2026. They run promotions and price by variant, so confirm the current price on their page before you buy.
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Overview
4 to 1 Solar Y Branch Connectors MFFFF + FMMMM Pair
Extended Y branch connectors for four panels in parallel. Designed around 400W kits, with enough lead length to reach panels mounted in either portrait or landscape without a tangle of cable across the roof.
- Four panels into one pair of leads
- Supplied as a pair: MFFFF and FMMMM
- Suits 400W kits (four 100W panels)
- Extended leads for portrait or landscape mounting
- Hard plastic construction
Four in parallel means real current
Four 100W panels in parallel is roughly 20–22A down a single pair of cables. That wants 6mm² as a minimum, a controller rated for it, and a fuse on each string — with four panels, back-feed into a faulted module is a genuine risk rather than a theoretical one.
Or consider two pairs in series
Two series pairs wired in parallel gives you the same 400W at double the voltage and half the current. On a long run to the controller that is cheaper in cable and more efficient. The trade-off, as always, is shading: series strings suffer more when part of the array is shadowed.
Before you order
The extended leads are the point of this version — they let panels be spaced across a roof without an extra set of extension cables. Check they reach your intended layout before committing to a panel arrangement.
Renogy's published figures
Taken from Renogy's own specification for this product, on the date shown by the price. Anything wired into 230V mains should be signed off by a qualified electrician.
Build notes for this part
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Useful product advice, installation considerations and occasional offers for this part of your van build.