Features Consisting of insulating PC material and built-in thermal trip device, the photovoltaicsurge protector has temperature controlled circuit breaker technology for household lightning protection. The 2P lightning protector has as a DC + and - connection and a ground connection. It is installed in parallel with your DC solar input to your inverter or battery system (not inline), preventing your systems from getting destroyed from close lighting strikes or induced surges DC photovoltaic surge protector is mounted on a 2P standard 36MM rail and can be used with circuit breakers in the distribution box. The power supply must be cut off before installation The voltage arrester device is made of precise electronic components, and is capable of providing a continuous operating voltage of up to 1,000V DC The color of the visual alarm window indicates the operating status of the protection, green (normal), red (fault). 2P arrester device is widely used to provide safety protection for electronic equipment, instrumentation and communication lines Features: The product shell is made of PC flame retardant material, which is fireproof safer to use, minimize the possibility of accidents. The product adopts modular design, and its use and maintenance are very simple. The product is made of precision electronic components, with longer service life and more stable performance. This product adopts 2P guide rail installation, and installation is very simple. Installation with standard 36MM guide rail and use with circuit breaker in distribution box. The DC surge arrester is suitable for the lightning protection of solar photovoltaic power generation systems or other DC power systems, and can be used normally in high altitude areas to protect the DC power system from lightning strikes or overvoltage. Built-in thermal tripping device, temperature-controlled circuit breaker technology. The color of the visual alarm window indicates the working status of the protection, green (normal), red (fault). High working voltage, high flow rate, high safety and high stability. It has a strong lightning current release capability and is suitable for solar power generation systems. Modular separation structure, easy operation and maintenance. Specification: Material: PC flame retardant shell Uc: 1000V Type: #2, 20/40KA Nominal discharge current: 10KA(#1), 20KA(#2) Maximum discharge current: 20KA(#1), 40KA(#2) Installation mode: 2P guide rail mounting Residual voltage after unloading voltage: <3.0KV Rated connectivity and segmentation ability: 1M Product dimension: 90*49*36mm / 3.5*1.9*1.4in Weight: 260g/9.2oz Note: Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List: 1 * DC Photovoltaic Surge Protector Package List