Lead Assembly For Connecting Solar Panel Arrays To Inverter

What is this patent about?

’153 is related to the field of electrical components, specifically addressing the connection of solar panel arrays to an inverter. Traditional solar power installations require a combiner box to consolidate the energy from multiple solar arrays before it reaches the inverter. These combiner boxes are bulky, prone to failure, and require skilled installation and maintenance, adding to the overall cost and complexity of solar energy systems.

The underlying idea behind ’153 is to eliminate the need for a combiner box by creating a lead assembly that directly connects multiple solar arrays to a feeder cable, which then connects to the inverter. This is achieved by joining one or more drop lines (connected to the solar arrays via wire harnesses) to a single feeder cable at a central point, or nexus. The nexus is then encapsulated in a durable, environmentally resistant molding.

The claims of ’153 focus on a lead assembly comprising a drop line connected to a wire harness from a solar panel array, a feeder cable electrically coupled to the drop line at a nexus, and a mold encasing the nexus. The mold has apertures for the feeder cable and drop line(s). Some claims specify an undermold and overmold, while others refer to a single primary mold. The claims also cover a solar power system incorporating this lead assembly.

In practice, the lead assembly acts as a direct conduit, channeling power from several solar arrays into a single feeder cable that leads to the inverter. The compression lug ensures a secure electrical connection between the drop lines and the feeder cable at the nexus. The undermolding and overmolding provide robust protection against environmental factors, ensuring long-term reliability, even when buried underground. The number of drop lines per assembly (single or dual) can be adapted to suit different solar panel configurations and field layouts.

This design differs from prior approaches by removing the combiner box entirely. Instead of individually wiring each solar array to a central combiner, the lead assembly effectively 'combines' the power at the joint of the drop lines and feeder cable. This simplifies installation, reduces potential failure points, and lowers overall system costs. The use of injection-molded encapsulation further enhances durability compared to traditional wiring methods, making the system more resilient to temperature fluctuations, moisture, and physical damage.