{"product_id":"renogy-solar-mc4-y-branch-connectors-mffff-fmmmm-pair","title":"4 to 1 Solar Y Branch Connectors MFFFF  + FMMMM Pair","description":"\u003cp\u003e\u003cstrong\u003eExtended Y branch connectors for four panels in parallel.\u003c\/strong\u003e 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.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour panels into one\u003c\/strong\u003e pair of leads\u003c\/li\u003e\n\u003cli\u003eSupplied as a pair: \u003cstrong\u003eMFFFF\u003c\/strong\u003e and \u003cstrong\u003eFMMMM\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuits \u003cstrong\u003e400W kits\u003c\/strong\u003e (four 100W panels)\u003c\/li\u003e\n\u003cli\u003eExtended leads for portrait or landscape mounting\u003c\/li\u003e\n\u003cli\u003eHard plastic construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFour in parallel means real current\u003c\/h3\u003e\u003cp\u003eFour 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.\u003c\/p\u003e\u003ch3\u003eOr consider two pairs in series\u003c\/h3\u003e\u003cp\u003eTwo 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.\u003c\/p\u003e\u003ch3\u003eBefore you order\u003c\/h3\u003e\u003cp\u003eThe 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.\u003c\/p\u003e","brand":"Renogy","offers":[{"title":"Default Title","offer_id":51358100553895,"sku":"RNG-CNCT-MC4BC-UK","price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/1158\/3143\/files\/20181107_131729_20180607_070200_cnct-mc4bc-01__56244152640539912801280__16892.1582017810.1280.1280.jpg?v=1789801130","url":"https:\/\/shop.roamwired.com\/products\/renogy-solar-mc4-y-branch-connectors-mffff-fmmmm-pair","provider":"Roam Wired Shop","version":"1.0","type":"link"}