Balance of Systems

PV wires are specifically designed for solar applications and are resistant to
sunlight, heat, and humidity. THHN wires, on the other hand, excel in pressure
resistance and are commonly used for various electrical applications, including
battery connections.

MST wires use 100% copper material, with annealed tinned coating and
stranded treatment to ensure maximum conductivity, bendability and corrosion


Both PV wire and THHN wire can technically be used to connect a solar power
station. However, PV wire is specifically engineered for solar applications, offering
superior resistance to environmental factors like sunlight and heat. Therefore, PV
wire is generally the preferred choice for solar installations due to its specialized

The gauges (8AWG, 10AWG, 12AWG, etc.) refer to the wire thickness or diameter.
The smaller the number, the thicker the wire.
MST wires’ cross sectional area standards exceed conventional US standards,
offering optimal the current-carrying capacity and suitability for specific

  • True 4mm wire cross sectional area for 12AWG wire, 21% larger conductor
    cross sectional area than 12AWG standard (3.3mm)
  • True 6mm wire cross sectional area for 10AWG wire, 14% larger conductor
    cross sectional area than 10AWG standard (5.26mm)
  • True 10mm wire cross sectional area for 8AWG wire, 20% larger conductor
    cross sectional area than 8AWG(8.36mm)

All PV connectors are used to connect solar panels together securely and
efficiently and to the rest of the solar power system, facilitating safe and reliable
transmission of electricity generated by the solar panels

  • Single-node PV connectors are used when connecting individual solar
    panels to each other or to other components of the solar power system,
    such as inverters or combiner boxes.
  • T connectors are used when branching off from a main solar panel array to
    create multiple strings or sub-arrays. They have one input and two
    outputs, allowing for the connection of two separate strings of solar
    panels to a single main string. T connectors are commonly used in larger
    solar installations where multiple strings of panels are required to optimize
    the system's performance or accommodate different roof configurations.
  • Y connectors are similar to T connectors but have one input and three
    outputs, forming a Y-shape. They are used when branching off from a main
    string to create three separate strings or sub-arrays. Y connectors are
    particularly useful in situations where additional flexibility or customization
    is needed in the layout of the solar panel array. They allow for efficient
    distribution of power from a single source to multiple destinations.

In summary, single-node PV connectors are used for individual panel connections,
T connectors are used for branching off into two separate strings, and Y
connectors are used for branching off into three separate strings in a solar panel
installation. The choice of connector depends on the specific layout and design
requirements of the solar power system.

No, not all assembly wrenches are universally compatible with all types of PV
connectors. Please refer to the product specifications to determine if a particular
assembly wrench is designed for specific PV connector models.

No. We do not offer a warranty for BOS components. However, we do offer
returns for non-open box items.