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# Wall-Mounted DC-Coupled Grid-Tied and Off-Grid System


With "DC coupling and integrated grid-tied/off-grid operation" as its core concept, VGID POWER introduces a new generation of wall-mounted solar-storage-charging solutions. Built around the dual core of **Leona-H135K (SP135HAPSS)** and **Leona-M200K (SP200HAPV)**, the system redefines how distributed energy is connected — fewer cables, a smaller footprint, higher protection, and more flexible topologies — bringing integrated solar-storage-charging into commercial, industrial, and residential applications.


  Dual-Core Products: Leona-H135K & Leona-M200K


  The complete system consists of two wall-mounted core devices: the Leona-H135K handles AC-side power conversion and seamless grid-tied/off-grid switching, while the Leona-M200K handles DC-side PV conversion and battery dispatch. Together they form a complete, compact, and flexibly scalable DC-coupled grid-tied and off-grid system.


    [Leona-H135K · SP135HAPSS Wall-Mounted Grid-Forming Energy Storage PCS Protection Rating IP65 Installation Wall-mounted Overload Capability 125% Core Configuration Built-in STS / ATS dual AC inputs View Full Specifications →](/zh/product/sp135hapss)
    [Leona-M200K · SP200HAPV Wall-Mounted DC Converter DCDC/MPPT Rated Power 200 / 150 kW Max. Efficiency 99.26% MPPT Channels 16 / 12 Protection Rating IP65 View Full Specifications →](/zh/product/sp200-150hapv)


  System Architecture: DC-Coupled, Multi-Terminal Coordination


  The system adopts a DC bus coupling architecture. PV is connected to the DC bus nearby through MPPT units; batteries, DC chargers, loads, the grid (GRID), and generators are dispatched in a unified manner through the PCS unit of the Leona-M200K. The AC side and DC side use an AC BUS / DC BUS dual-bus design, with an independent communication network, achieving a clear separation of energy flow and information flow.


  **DC-coupled system topology:** PV → MPPT → DC BUS → PCS → Grid / Generator / Battery / DC Charge / Load


    **Direct PV Connection:** Module DC power enters the system directly, eliminating the need for a conventional combiner box and reducing one stage of conversion loss.


    **Direct Battery Connection:** Cells/battery clusters connect directly to the DC bus for higher charge and discharge efficiency.


    **DC Fast Charging:** DC chargers draw power directly, avoiding repeated AC-DC conversion and reducing energy consumption and equipment costs.


    **Grid-Tied/Off-Grid Switching:** Grid-tied operation when the grid is normal, and millisecond-level off-grid power supply during grid faults, ensuring uninterrupted power for critical loads.


  Eight Core Advantages


    01

Direct PV Connection, No Combiner Box

Fewer equipment tiers, lower system cost and fewer failure points.


    02

MPPT Deployed Nearby

Trackers are placed close to the modules, significantly shortening DC cables and reducing line losses and installation costs.


    03

Lightweight Wall-Mounted Structure

No large lifting equipment required; a single person can install it, greatly improving transport and deployment efficiency.


    04

AC/DC Bidirectional Charging Direct Connection

Flexibly build charging systems at multiple voltage levels, adapting to complex conditions such as weak grids and phase-loss grids.


    05

One-Cluster-One-Management & Parallel Connection

Supports refined battery cluster management and centralized parallel expansion, flexibly matching different capacities and topologies.


    06

Modular Independent Design

Each functional unit is an independent module; a single-point failure does not affect overall operation, significantly reducing maintenance costs.


    07

Built-In Dual AC Inputs

Automatic switching between grid and diesel generator AC inputs without an external ATS module.


    08

IP65 High Protection Rating

Dust-proof and water-proof, suitable for outdoor, island, high-humidity, high-salt-spray, and other demanding application scenarios.


  Typical Application Scenarios


  With high integration and strong environmental adaptability, the Leona series wall-mounted DC-coupled grid-tied and off-grid system has been deployed at scale in multiple scenarios:


    Commercial and Industrial Rooftop Solar-Storage Integration
    Island / Weak-Grid Off-Grid Microgrid
    Solar-Storage-Charging Station (Integrated Solar-Storage-Charging)
    Industrial Park / Data Center Backup Power
    Mobile / Emergency Energy Support
    Distributed Microgrid


  Get a Customized Solution Now


  Whether you are planning a new solar-storage plant or upgrading an existing grid-tied and off-grid system, VGID POWER can tailor the most suitable solution for you based on the Leona-H135K and Leona-M200K. Contact us to obtain product brochures, system configurations, and quotations.


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