Solar PV & Energy Storage Protection Components
Explore PV combiner boxes and the components used for string protection, surge protection and DC isolation. Then review their place in your solar system and the separate requirements of battery-side circuits.
Inside a VIOX PV combiner box.
Explore string protection, surge protection and DC isolation in one interactive view. Select a component to see its role, or view a complete VIOX combiner box.
PV fuse protection
VIOX DCヒューズホルダー VOR-32シリーズ
Protect individual PV strings with a correctly specified gPV fuse and compatible holder. Confirm voltage, current and interruption ratings against the array design.
DCサージ保護
VIOX VSP1-C40PV/3(S) 1500V(D4) プラガブル多極SPD
Limit transient overvoltage on the PV side. Confirm the operating voltage, protection modes and earthing arrangement for the installation.
DC isolation
VOPV DCアイソレータスイッチ ELR2シリーズ
Provide a defined manual isolation point. Confirm the DC voltage, current and pole arrangement for the chosen switch and system.
Complete combiner box
VOPV1000-3/1 太陽光発電接続箱
Bring string combining, protective components and enclosure requirements together. Review the complete assembly and its model-specific component list before ordering.
Component-family illustration, not a wiring diagram or the bill of materials for the box shown. Exact components and ratings vary by assembly.
See where the combiner fits in your PV system.
Follow the path from PV strings to the inverter. Confirm which combining, protection and isolation functions your system requires, then check the selected devices against its electrical ratings and installation requirements.
- PVストリングSource circuits from the array
- J-Box、スプライスボックス、プルボックスPV field connections
- Combine & protectExplore the components inside
- 絶縁Defined DC isolation point
- ConvertInverter or power-conversion input
Conceptual system map—not a wiring diagram. The exact location, device type, ratings and coordination depend on the PV or storage architecture, equipment instructions and applicable installation requirements.
Battery-side DC protection is a separate design decision.
Confirm bidirectional current, maximum DC voltage, prospective fault current, isolation requirements and the battery or PCS manufacturer’s instructions before applying a PV-oriented component to a storage circuit.
Choose products by protection function.
Use these product families to build a shortlist, then confirm the exact model, ratings, wiring arrangement and documents for the selected project.
ソーラーコンバイナーボックス
Combine multiple PV strings and organize string-level protective functions.
Explore the range →
DC Miniature Circuit Breakers
Interrupt overload and short-circuit current within the model’s declared DC ratings.
Explore the range →Photovoltaic DC Isolators
Provide a defined means of DC isolation for the selected system position.
Explore the range →PV Surge Protective Devices
Limit transient overvoltage through a coordinated protection path to earth.
Explore the range →DCヒューズホルダー
Support replaceable DC fuse protection where the system design requires it.
Explore the range →
MC4-Compatible Connectors
Create field connections between PV conductors and compatible solar equipment.
Explore the range →The same product category serves different system conditions.
Application scale alone does not determine a model. Array architecture, electrical ratings, environmental exposure and maintenance strategy define what must be verified.
- 住宅用屋上太陽光発電
- Confirm string count, maximum array voltage, inverter instructions, accessibility and required isolation points.
- Commercial & industrial rooftops
- Review multiple arrays, longer conductor paths, combiner architecture, coordination and enclosure conditions.
- Ground-mounted solar systems
- Account for array segmentation, environmental exposure, cable routes, fault conditions and service isolation.
- バッテリーエネルギー貯蔵
- Verify source behavior, bidirectional current, DC fault energy and the exact battery and PCS requirements.
Prepare your solar DC protection specification.
Share confirmed values and mark unknown items for engineering review. A project name such as “rooftop solar” is not enough to select DC protective equipment.
- システムアーキテクチャ
- PV-only or PV plus storage, inverter or PCS arrangement, and required DC isolation points.
- 電圧
- Maximum corrected PV voltage or battery operating-voltage range.
- Current & strings
- String current, parallel-string count, conductor capacity and expected operating current.
- 故障状態
- Available DC fault current, source behavior and required interruption or backup coordination.
- Surge & grounding
- Earthing arrangement, protection modes, SPD location and upstream/downstream coordination.
- Installation & order
- Environment, enclosure, temperature, destination market, quantity and required documents.
Solar DC design and selection guides
Use the technical library to resolve system-level questions before confirming a product family or model.
Planning a solar PV or battery DC system?
Share the system voltage, current, string layout, protection scope, installation environment and target market with VIOX.