Advanced Solar PV Junction Box Solutions
Precision-engineered photovoltaic interconnection solutions for the next generation of solar energy.
Three compact boxes. One bypass diode in each.
Scroll to take it apart: covers, gaskets, diodes, terminals and cables, in the order they are built.
Every watt a photovoltaic module produces leaves through its junction box. Inside sit the terminations of the cell strings, the bypass diodes that protect shaded substrings, and the cable assemblies that join the module to the rest of the array. Somnyx Solar manufactures 3-split junction boxes for this job, engineered for 1500 V systems and the higher currents of today's large-format modules.
Three current ratings, one 3-split platform. Every variant shares the same enclosures, sealing system and cable assemblies, and differs in diode selection and thermal design to match the short-circuit current of the module it serves.
25A
The 25 A variant is designed for mainstream crystalline-silicon modules whose short-circuit current, including any bifacial gain, sits comfortably below the box's rated current.
30A
The 30 A variant is designed for higher-current large-format modules, giving additional margin for bifacial rear-side gain and elevated operating temperatures.
35A
The 35 A variant is designed for the highest-current module formats, with diode selection and heat dissipation across the three split boxes sized for maximum thermal margin.
Take the three boxes apart. Select any component to isolate it, see what it does and the engineering behind it.
A junction box spends twenty-five years or more on a module roof, through heat, ultraviolet light, rain, frost and continuous electrical stress. Our engineering is organised around the six areas that decide whether it lasts.
Our six engineering prioritiesThree-substring module with a 3-split junction box
In full sun all three substrings generate, and current passes through them in series. Each bypass diode is reverse-biased and carries almost no current.
Switch to a shaded condition to see what the junction box does when part of the module stops producing.
Somnyx Solar manufactures photovoltaic junction boxes in Gujarat, close to one of India's largest concentrations of module manufacturing, with 3.6 GW of annual production capacity.
See how we manufactureJunction boxes are specified by module manufacturers and judged by everyone downstream. We are building our products and partnerships around the needs of each part of the solar value chain.
Junction boxes specified around your cell format, current and line.
Module makers choose the box. We work with you on current rating, cable length, connector compatibility and how the boxes are placed and joined on your line, so the product fits your process rather than the other way round.
1500 V systems with long strings and high-current modules.
Utility modules run in 1500 V strings, often bifacial, at large current. Our 1500 V DC junction boxes, rated up to 35 A, are built for this class of module.
Rooftop and C&I arrays where reliability is judged over decades.
Rooftop and C&I installations face partial shading from structures and soiling, which puts bypass diodes to work. Our split design spreads diode heat across three boxes for this reason.
Custom variants built around a partner's specification.
Cable lengths, connector types, labelling and packaging can all be specified to suit an OEM or ODM programme, built on our 3-split platform.
A 3.6 GW Indian source for PV junction boxes.
With 3.6 GW of annual capacity in Gujarat, we give procurement teams a dependable, nearby source of PV junction boxes and support a stronger domestic solar supply chain.
Tell us your module format, current and volumes. We will reply with pricing, lead times and the right configuration for your line.