{"product_id":"dc-pv-y-branch-solar-connector-1000v-30a-1-to-2-3-4-photovoltaic-plug","title":"DC PV Y Branch Solar Connector – 1000V 30A, 1-to-2\/3\/4 Male Female Adapter, 3-Way 4-Way 5-Way Photovoltaic Plug","description":"\u003ch2\u003eDC PV Y Branch Solar Connector – 1000V 30A, 1-to-2\/3\/4 Photovoltaic Panel Parallel Adapter\u003c\/h2\u003e\n\n\u003cp\u003ePV Y-branch connectors (also called T-branch or multi-branch connectors) allow multiple solar panels to be connected in parallel without a combiner box — combining the current from 2, 3, or 4 panels into a single cable run to the inverter or charge controller. The 1000V DC rating covers standard residential and commercial PV system voltages. The 30A current rating accommodates the combined short-circuit current (Isc) of multiple panels in parallel. MC4-compatible housing geometry ensures compatibility with standard MC4 solar cable assemblies.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 1000V DC (IEC 61215 \/ UL 1703)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 30A per branch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfigurations:\u003c\/strong\u003e 1-to-2 (T-branch), 1-to-3 (Y-branch), 1-to-4 (4-way branch) (select above)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Material:\u003c\/strong\u003e Copper alloy, tin-plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e UV-resistant PA66 nylon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIP Rating:\u003c\/strong\u003e IP67\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCable Entry:\u003c\/strong\u003e 4–6mm² (12–10AWG) solar cable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e MC4-compatible (standard 4mm² solar cable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1, 5, or 20 sets (select above)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSeries vs Parallel PV Wiring — When to Use Y-Branch Connectors\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries wiring:\u003c\/strong\u003e Panels connected positive-to-negative. Voltage adds; current stays the same. Use for string inverters requiring high DC input voltage (300–600V). No Y-branch connectors needed — standard MC4 male-to-female connections.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParallel wiring (Y-branch, this product):\u003c\/strong\u003e Panels connected positive-to-positive, negative-to-negative. Current adds; voltage stays the same. Use for: MPPT charge controllers with low voltage input, microinverters with individual panel connections, and mixed-orientation panel arrays where shading on one panel should not affect others. Y-branch connectors combine the positive outputs and negative outputs of multiple panels into single cable runs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries-parallel:\u003c\/strong\u003e Combination of both. Strings of series-connected panels are then paralleled using Y-branch connectors. Common in larger residential and commercial systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCurrent Rating — How to Verify Your System is Within Limits\u003c\/h3\u003e\n\u003cp\u003eThe 30A rating applies to the combined current on the trunk cable (the single cable exiting the Y-branch). Calculate as follows:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFind the short-circuit current (Isc) on your panel datasheet\u003c\/li\u003e\n  \u003cli\u003eMultiply by the number of panels in parallel: Total Isc = Panel Isc × Number of panels\u003c\/li\u003e\n  \u003cli\u003eApply a 1.25× safety factor per NEC 690.8: Design current = Total Isc × 1.25\u003c\/li\u003e\n  \u003cli\u003eVerify design current ≤ 30A (connector rating) and ≤ cable ampacity\u003c\/li\u003e\n  \u003cli\u003e\u003cem\u003eExample: 3 panels × 10A Isc = 30A × 1.25 = 37.5A design current — exceeds 30A rating. Use a combiner box instead.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eCan I connect panels with different wattages in parallel using Y-branch connectors?\u003c\/h4\u003e\n\u003cp\u003eTechnically yes, but not recommended. Panels in parallel must have the same open-circuit voltage (Voc) to avoid reverse current flow from higher-voltage panels into lower-voltage panels. Panels with different wattages but the same Voc (common in same-model panels with different degradation levels) can be paralleled safely. Panels with different Voc values should not be paralleled — use separate strings or a combiner box with individual fusing per string.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need bypass diodes or fuses with Y-branch connectors?\u003c\/h4\u003e\n\u003cp\u003eFor systems with 2 or more panels in parallel, each string should be protected by a series fuse or circuit breaker rated slightly above the panel’s Isc. Without individual string fusing, a shaded or failed panel can become a current sink, drawing reverse current from the other panels through the Y-branch — potentially exceeding the panel’s reverse current rating and causing damage or fire. Most modern panels include bypass diodes within the junction box, but these protect against internal cell shading, not reverse current from parallel strings.\u003c\/p\u003e\n\n\u003ch4\u003eAre these MC4 compatible?\u003c\/h4\u003e\n\u003cp\u003eThese connectors use MC4-compatible housing geometry and mate with standard MC4 male and female connectors. However, “MC4-compatible” does not mean “identical to genuine Staubli MC4.” For IEC 62548 and NEC 690 compliant installations requiring certified components, specify genuine Staubli MC4 or equivalent UL-listed connectors. For off-grid, DIY, and non-utility-interactive systems, MC4-compatible connectors provide equivalent performance.\u003c\/p\u003e\n\n\u003ch4\u003eWhat cable size should I use with PV Y-branch connectors?\u003c\/h4\u003e\n\u003cp\u003eStandard PV cable is 4mm² (12AWG) for most residential panel connections. The trunk cable (exiting the Y-branch) must be sized for the combined current of all parallel panels — if the combined current exceeds the ampacity of 4mm² cable (approximately 30A in free air), upsize to 6mm² (10AWG). Always use UV-resistant, double-insulated PV cable (TUV 2Pfg 1169 or UL 4703) — standard electrical cable is not rated for outdoor DC solar applications.\u003c\/p\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOff-grid solar:\u003c\/strong\u003e Paralleling panels to increase current output to MPPT charge controllers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRV and marine solar:\u003c\/strong\u003e Combining multiple roof panels into a single cable run to the charge controller\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResidential grid-tie:\u003c\/strong\u003e Series-parallel string configurations for string inverters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePortable solar:\u003c\/strong\u003e Combining foldable panel outputs for portable power stations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAgricultural:\u003c\/strong\u003e Remote irrigation pump solar systems with multiple panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cp\u003e1, 5, or 20 sets (select above) — each set: male Y-branch + female Y-branch (configuration as selected: 1-to-2, 1-to-3, or 1-to-4).\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"Y-3 A and B \/ 1 SET","offer_id":47850657153269,"sku":"14:200004891#Y-3 A and B;200001249:202408827#1 SET","price":31.12,"currency_code":"USD","in_stock":true},{"title":"Y-3 A and B \/ 5 SETS","offer_id":47850657251573,"sku":"14:200004891#Y-3 A and B;200001249:202408828#5 SETS","price":101.22,"currency_code":"USD","in_stock":true},{"title":"Y-3 A and B \/ 20 SETS","offer_id":47850657218805,"sku":"14:200004891#Y-3 A and B;200001249:202408829#20 SETS","price":401.21,"currency_code":"USD","in_stock":true},{"title":"Y-3 A and B \/ 100 SETS","offer_id":47850657317109,"sku":"14:200004891#Y-3 A and B;200001249:202408830#100 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