{"title":"MC4 3-to-1 Adapters","description":"\u003cp\u003eThe array grew and the cable did not.\u003c\/p\u003e\u003cp\u003eIt is the most common fault in an evolved solar setup. Two panels went on at the start, the run down to the regulator was sized properly for two, and then a third panel arrived a season later and joined the same lead. Three matched panels in parallel put three panels' worth of current down a cable chosen for two: half as much again as the array it replaced, not three times.\u003c\/p\u003e\u003cp\u003eAn MC4 3-to-1 branch connector is the tidy way to combine them. Three positives in, one out, sealed for permanent outdoor use. It also keeps roof penetrations down, which matters more than it sounds. Every extra cable through a roof is another gland, another seal and another thing to check after a few summers in the sun.\u003c\/p\u003e\u003cp\u003eBut the connector is the easy part. When you add the third panel, re-check three things against the new total current: the cable rating for the run, the controller's input rating, and the branch connector's own rating, which differs between brands. The old cable may still be fine. Confirm it rather than assume either way.\u003c\/p\u003e\u003cp\u003eDo that and the array scales cleanly. Skip it and the weakest part of the run is now the part nobody looked at.\u003c\/p\u003e","products":[{"product_id":"roam-gear-solar-mc4-3-to-1-adaptors-pair","title":"Roam Gear Solar MC4 3-to-1 Adaptors (Pair)","description":"\u003cp\u003eFor joining three solar panels in parallel into one MC4 lead. The pair covers both the positive and negative side. Before combining panels, check the total current stays within your charge controller's input rating.\u003c\/p\u003e","brand":"Roam Gear","offers":[{"title":"Default Title","offer_id":42628259512492,"sku":"RG-MC43TO1","price":24.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0598\/1129\/9500\/files\/roam-gear-solar-mc4-3-to-1-adaptors-pair.webp?v=1710996962"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0598\/1129\/9500\/collections\/roam-gear-solar-mc4-3-to-1-adaptors-pair-front_72908461-9d6a-4d56-98fa-03f96045deec.webp?v=1741686557","url":"https:\/\/roamgear.com.au\/collections\/mc4-3-to-1-adapters.oembed","provider":"Roam Gear","version":"1.0","type":"link"}