PV Surge Protection & DC Isolator 1000V – 3-in-3-out

This powerful surge protector with an integrated DC disconnect switch is specifically designed for photovoltaic systems and reliably protects your solar installation from harmful voltage spikes, lightning currents, and electrical overloads. By combining multiple protection mechanisms, your PV system receives comprehensive security.

Whether on the roof, in open fields, or as an intermediate distributor – thanks to the weatherproof housing (IP65) and UV-resistant materials, use under demanding environmental conditions is easily possible. The transparent cover allows for quick visual inspection without opening the housing.

The integrated DC disconnect switch allows for safe shutdown of the strings for maintenance, service, or in case of a fault. Additionally, the surge protector is designed to use replaceable modules, simplifying maintenance and reducing operating costs.

Thanks to factory wiring and plug-and-play configuration, labor-intensive manual cabling is eliminated, minimizing time and potential errors. With factory-connected 6.0 mm² cables (in plus/minus), the system is immediately installable.

This system is ideally suited for both grid-connected and off-grid PV systems and is widely used in residential and small installations, gardens, agricultural projects, or on carports and sheds.

Technical Features & Functions

• Design for **3 strings** (inputs) and corresponding outputs
• Maximum operating voltage: **1000 V DC**
• Integrated circuit breaker (32 A, DC) per string
• Surge arrester (Type I/II) with modular, replaceable elements
• Protection against: overvoltage, overcurrent, overload, lightning, short circuit
• Housing material: ABS + PC, flame retardant, UV-resistant
• Protection class: **IP65** (dust and waterproof) with weatherproof construction
• Transparent cover for status control without opening
• Factory-wired with 6.0 mm² solar cables for plus/minus; strain relief integrated
• Cable glands (e.g., PG13.5) included
• Grounding connection / potential equalization provided in the housing

Applications & Areas of Use

This surge protector / junction box is excellently suited for small to medium-sized PV projects with up to three parallel strings. It can be used in both grid-connected solar power systems and standalone systems. Typical areas of use include:

• Residential buildings, carports, and garden installations
• Commercial installations of smaller capacity
• Agricultural projects, irrigation systems, pumping installations
• Camping, vehicles, RVs, and boat installations
• Photovoltaic systems in outdoor areas with direct weather exposure

Advantages & Highlights

Safety & Reliability: By combining surge protection, disconnect switch, and fuses, risks from lightning currents, voltage spikes, and overload are significantly minimized.

Easy Installation: Plug-and-play concept with factory wiring saves installation time and reduces sources of error. The transparent cover allows for quick visual inspections.

Maintenance-Friendly: Replaceable protection modules reduce long-term maintenance costs. In case of a defect, only the affected module needs to be replaced.

Robust Design: Weatherproof, UV-resistant IP65 housing ensures lasting protection even in harsh environments.

Flexible Use: Universally suitable for many PV systems and applications, ideal for three-string configurations.

Technical Data (Example Values)

• Operating voltage (Un): 1000 V DC
• Rated current (In): 32 A (per string)
• Maximum discharge current (Imax): typically up to 40 kA
• Protection level (Up): ≤ approx. 2.8 kV (depending on the module)
• Connection cross-section PV cable: 6.0 mm² (plus/minus)
• Housing material: ABS + PC (flame retardant, UV-stabilized)
• Protection class: IP65
• Operating temperature range: approximately –20 °C to +55 °C
• Cable routing / strain relief: included