{"product_id":"sigenmicro-ac-trunk-cable-40p-1-1m-4-0mm2-rooftop-bus-cable","title":"SigenMicro AC Trunk Cable 40P 1.1m 4.0mm2 - Rooftop Bus Cable","description":"\u003c!-- SEO Product Name: SigenMicro AC Trunk Cable 40P 1.1m 4.0mm2 - Rooftop Bus Cable --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eSigenMicro AC Trunk-40P-1.1M-4.0 (MPN 14280066)\u003c\/strong\u003e is the pre-terminated AC bus cable used to link a string of SigenMicro microinverters, with connectors moulded on at a tight \u003cstrong\u003e1.1m interval\u003c\/strong\u003e to suit closely spaced installations. As with the standard trunk cable, no on-site crimping is needed — the cable is simply run along the array and \u003cstrong\u003ecut to length\u003c\/strong\u003e where required.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThis variant is built for \u003cstrong\u003eportrait-oriented PV modules\u003c\/strong\u003e, where microinverters sit closer together along each row. It ships with \u003cstrong\u003e40 pre-fitted connectors\u003c\/strong\u003e across a \u003cstrong\u003e44m total length\u003c\/strong\u003e, giving enough connection points for longer portrait strings without needing extra couplers.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eConductor cross-section on this variant is the larger \u003cstrong\u003e4.0mm²\u003c\/strong\u003e, chosen where a run carries more microinverters, a longer overall AC bus length, or where minimising \u003cstrong\u003evoltage drop\u003c\/strong\u003e along the trunk matters — for example on larger UK rooftop arrays approaching the system's parallel connection limits. Every joint uses the same locking connector system as the rest of the SigenMicro kit, so trunk sections, couplers and terminators all click together without tools other than the dedicated unlock tools.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; width:100%; margin:0 0 24px 0; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"flex:1; min-width:100px; background:#008377CF; color:#fff; text-align:center; padding:14px 8px; border-right:1px solid rgba(255,255,255,0.25);\"\u003e\n\u003cdiv style=\"font-size:18px; font-weight:700; line-height:1.2;\"\u003e1.1m\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px; text-transform:uppercase; letter-spacing:.04em; margin-top:4px;\"\u003eConnector Interval\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:100px; background:#008377CF; color:#fff; text-align:center; padding:14px 8px; border-right:1px solid rgba(255,255,255,0.25);\"\u003e\n\u003cdiv style=\"font-size:18px; font-weight:700; line-height:1.2;\"\u003e4.0mm²\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px; text-transform:uppercase; letter-spacing:.04em; margin-top:4px;\"\u003eConductor Size\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:100px; background:#008377CF; color:#fff; text-align:center; padding:14px 8px; border-right:1px solid rgba(255,255,255,0.25);\"\u003e\n\u003cdiv style=\"font-size:18px; font-weight:700; line-height:1.2;\"\u003e40\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px; text-transform:uppercase; letter-spacing:.04em; margin-top:4px;\"\u003ePre-Fitted Connectors\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:100px; background:#008377CF; color:#fff; text-align:center; padding:14px 8px; border-right:1px solid rgba(255,255,255,0.25);\"\u003e\n\u003cdiv style=\"font-size:18px; font-weight:700; line-height:1.2;\"\u003e44m\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px; text-transform:uppercase; letter-spacing:.04em; margin-top:4px;\"\u003eTotal Cable Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:100px; background:#008377CF; color:#fff; text-align:center; padding:14px 8px; border-right:1px solid rgba(255,255,255,0.25);\"\u003e\n\u003cdiv style=\"font-size:18px; font-weight:700; line-height:1.2;\"\u003ePortrait\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px; text-transform:uppercase; letter-spacing:.04em; margin-top:4px;\"\u003ePV Module Orientation\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:100px; background:#008377CF; color:#fff; text-align:center; padding:14px 8px; border-right:1px solid rgba(255,255,255,0.25);\"\u003e\n\u003cdiv style=\"font-size:18px; font-weight:700; line-height:1.2;\"\u003eCut-to-Length\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px; text-transform:uppercase; letter-spacing:.04em; margin-top:4px;\"\u003eOn-Site Trimming\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; padding:14px 18px; margin:0 0 20px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#E0942A; margin-bottom:4px; font-size:14px;\"\u003ePlease Note\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; line-height:1.6; color:#2B2B2B;\"\u003eThe \u003cstrong\u003e4.0mm²\u003c\/strong\u003e conductor is intended for longer or higher-current AC bus runs, where the thicker cable helps limit voltage drop across the string. For shorter runs or smaller arrays, the 2.5mm² SigenMicro AC Trunk-40P-1.1M-2.5 may be more cost-effective — check your installation's cable run length and number of parallel microinverters before choosing between the two.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:grid; grid-template-columns:1fr 1fr; gap:14px; margin:0 0 28px 0;\"\u003e\n\u003cdiv style=\"background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003ePre-Terminated Connectors\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6; color:#3A3A3A;\"\u003eArrives with \u003cstrong\u003e40 connectors already moulded onto the cable\u003c\/strong\u003e at fixed 1.1m spacing, removing the need for on-site crimping or splicing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eCut As Needed\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6; color:#3A3A3A;\"\u003eThe \u003cstrong\u003e44m integrated trunk\u003c\/strong\u003e can be \u003cstrong\u003ecut to length on installation\u003c\/strong\u003e, so a single reel covers rows of varying size without waste stock of multiple fixed lengths.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eHeavier Gauge for Longer Runs\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6; color:#3A3A3A;\"\u003eThe \u003cstrong\u003e4.0mm² conductor\u003c\/strong\u003e is sized for longer AC bus runs and larger microinverter strings, helping keep voltage drop within limits on bigger UK rooftop installations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eMatched to Portrait Layouts\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6; color:#3A3A3A;\"\u003eThe \u003cstrong\u003e1.1m interval\u003c\/strong\u003e is designed around portrait PV module widths, keeping each connector aligned directly under its microinverter along tighter row spacing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eWeatherproof Locking Connectors\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6; color:#3A3A3A;\"\u003eUses the SigenMicro locking connector system, compatible with the dedicated \u003cstrong\u003eAC Trunk Unlock Tool\u003c\/strong\u003e and \u003cstrong\u003eAC Trunk Port Cap\u003c\/strong\u003e for a fully weatherproof rooftop run.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15px; margin-bottom:6px;\"\u003eExtendable with Couplers\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.6; color:#3A3A3A;\"\u003eAdditional length beyond the standard reel can be added using the \u003cstrong\u003eSigenMicro AC Trunk Coupler\u003c\/strong\u003e, joining trunk cable to further trunk cable or field-supplied AC cable.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"width:100%; margin:0 0 28px 0; border:1px solid #D9EDEA; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px; font-size:13px; text-transform:uppercase; letter-spacing:.04em;\"\u003eCable\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eProduct Code\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003eSigenMicro AC Trunk-40P-1.1M-4.0\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eMPN\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003e14280066\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eConnector Interval\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003e1.1 m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eConductor Diameter\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003e4.0 mm²\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eNumber of Connectors\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003e40 pcs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eTotal Length\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003e44 m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eRecommended Layout\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003ePortrait PV modules\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px; font-size:13px; text-transform:uppercase; letter-spacing:.04em;\"\u003eCompatibility\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eUsed With\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003eSigenMicro 400 \/ 500 \/ 800 \/ 1000W microinverters\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eCompatible Accessories\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003eSigenMicro AC Trunk Coupler, AC Trunk Port Cap, AC Trunk Terminator, AC Trunk Unlock Tool\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #E5EFEE;\"\u003e\n\u003cdiv style=\"padding:9px 16px; font-weight:600; color:#333; font-size:14px; width:46%;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"padding:9px 16px; color:#222; font-size:14px; flex:1;\"\u003eRooftop solar, multi-microinverter strings, larger UK arrays\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FDECEC; border-left:4px solid #D32F2F; padding:14px 18px; margin:0 0 20px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#D32F2F; margin-bottom:4px; font-size:14px;\"\u003eImportant Safety Information\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; line-height:1.6; color:#2B2B2B;\"\u003eAC trunk cable installation and grid connection must be carried out by a \u003cstrong\u003equalified electrical installer\u003c\/strong\u003e in accordance with local wiring regulations. The distribution panel's AC switch rating and the number of microinverters connected in parallel should be checked against the manufacturer's technical parameters before selecting cable gauge.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 24px 0;\"\u003e\n\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:13px 18px; font-weight:700; font-size:15px; cursor:pointer; list-style:none;\"\u003eWhat is the difference between the 2.5mm² and 4.0mm² versions of this trunk cable?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px; font-size:15px; line-height:1.65; color:#2B2B2B; background:#fff;\"\u003eBoth use the same \u003cstrong\u003e1.1m connector interval and 40-connector count\u003c\/strong\u003e for portrait layouts, but the \u003cstrong\u003e4.0mm²\u003c\/strong\u003e version has a thicker conductor, better suited to longer AC bus runs or larger strings where voltage drop needs to be kept lower.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:13px 18px; font-weight:700; font-size:15px; cursor:pointer; list-style:none;\"\u003eWhen should I choose the 4.0mm² trunk cable over the 2.5mm² version?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px; font-size:15px; line-height:1.65; color:#2B2B2B; background:#fff;\"\u003eChoose the 4.0mm² version for \u003cstrong\u003elonger cable runs\u003c\/strong\u003e or where a large number of microinverters are connected in parallel on the same AC bus, since the heavier gauge helps limit voltage drop over distance.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:13px 18px; font-weight:700; font-size:15px; cursor:pointer; list-style:none;\"\u003eCan this trunk cable be cut to a shorter length?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px; font-size:15px; line-height:1.65; color:#2B2B2B; background:#fff;\"\u003eYes. The cable is described by the manufacturer as \u003cstrong\u003e\"cut as needed\"\u003c\/strong\u003e, so installers can trim the 44m trunk down to match the exact roof run required.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:13px 18px; font-weight:700; font-size:15px; cursor:pointer; list-style:none;\"\u003eWhat do I do with unused connectors at the end of a run?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px; font-size:15px; line-height:1.65; color:#2B2B2B; background:#fff;\"\u003eFit a \u003cstrong\u003eSigenMicro AC Trunk Port Cap\u003c\/strong\u003e over any unused connector, or a \u003cstrong\u003eSigenMicro AC Trunk Terminator\u003c\/strong\u003e at the physical end of the cable run, to keep the connection weatherproof.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; padding:13px 18px; font-weight:700; font-size:15px; cursor:pointer; list-style:none;\"\u003eWhich microinverters is this cable compatible with?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px; font-size:15px; line-height:1.65; color:#2B2B2B; background:#fff;\"\u003eIt is designed for the \u003cstrong\u003eSigenMicro 400, 500, 800 and 1000W\u003c\/strong\u003e microinverter range.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sigenergy","offers":[{"title":"Default Title","offer_id":65894764216669,"sku":"14280066","price":730.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/SigenMicroACTrunkCable40P1.1m2.5mm2-RooftopBusCable.png?v=1789145502","url":"https:\/\/qualityheating.co.uk\/products\/sigenmicro-ac-trunk-cable-40p-1-1m-4-0mm2-rooftop-bus-cable","provider":"AIZO Quality Heating","version":"1.0","type":"link"}