The WHES PP-S2 is a comprehensive, all-in-one energy storage system engineered specifically for single-phase residential applications. It represents a complete package that seamlessly integrates solar power conversion, battery storage, and intelligent energy management into a single, user-friendly unit. Designed to empower homeowners with energy independence, the system offers scalable power (from 3.6 kW to 10 kW) and energy capacity (from 4.99 kWh to 19.9 kWh), making it adaptable to a wide range of household energy needs and consumption patterns. Its core value proposition lies in delivering reliability, safety, and convenience, transforming how homes generate, store, and use electricity.
1. Core Performance and Capabilities
At the heart of the PP-S2 is its high-performance hybrid inverter and scalable battery bank. The system is designed for maximum photovoltaic (PV) utilization, supporting up to 2 times PV oversizing. This means homeowners can install a larger solar array than the inverter's rated power, maximizing energy harvest during periods of sub-optimal sunlight, such as early mornings, late afternoons, or cloudy days. Each PV input string supports a maximum current of 16A, ensuring compatibility with mainstream high-efficiency solar panels.
A standout feature critical for home resilience is its ultra-fast Emergency Power Supply (EPS) switching time of less than 10 milliseconds. In the event of a grid outage, the system can detect the failure and switch to backup power mode almost instantaneously, ensuring that essential household loads and sensitive electronics remain powered without interruption. The EPS output is robust, capable of providing a peak power of 1.5 times the rated power for 10 seconds to handle motor start-ups for appliances like refrigerators or pumps.
2. Design Philosophy: Convenience, Flexibility, Safety, and User-Friendliness
The product's advantages are clearly categorized in the document, highlighting a thoughtful design approach.
- Convenience: The PP-S2 prioritizes ease of installation and operation. It features a built-in meter function, which simplifies system communication wiring by eliminating the need for an external meter in many configurations. Furthermore, an integrated plug-in terminal for connecting battery modules is highlighted as saving 75% of installation time compared to systems requiring manual wiring of each module, significantly reducing on-site labor and complexity.
- Flexibility: The system is highly modular and scalable. The base energy unit is a 4.992 kWh Lithium Iron Phosphate (LFP) battery module (3.2V/52Ah cells in a 1P*30S configuration). A single PP-S2 unit can accommodate up to 4 of these modules, providing a maximum of 19.968 kWh of storage. For larger homes or greater energy independence needs, the system supports the parallel connection of up to 5 individual units, theoretically enabling a total storage capacity of nearly 100 kWh. This scalable architecture allows homeowners to start with a system that fits their current budget and expand it as their needs evolve.
- Safety: Safety is a non-negotiable pillar of the PP-S2's design. It employs a comprehensive four-layer protection design. Most notably, it includes a Built-in Aerosol Fire Suppression System (FSS) as a primary safety measure, designed to rapidly suppress a potential battery fire at its origin. The system also offers optional Arc Fault Circuit Interruption (AFCI) for enhanced protection against electrical arcs in the PV circuits. The use of long-life, stable LFP chemistry, coupled with compliance to the stringent UL9540A fire safety standard, underscores the product's commitment to the highest safety benchmarks.
- Friendly User Experience: The system is designed for comfort and broad operational capability. It operates at less than 25 dB, which is quieter than a typical library, ensuring no noise pollution for the household. To extend its operational range, it supports an optional intelligent heating module. With this module, the system can operate and charge at temperatures as low as -20°C, making it suitable for colder climates. Without the heater, the charging temperature range is 0°C to 50°C, while discharging is possible from -20°C to 55°C.
3. Technical Specifications Overview
The provided technical table details six models (SIA-3.6kW to SIA-10kW), outlining a clear progression in capacity and capability.
- PV Input: Maximum PV input power ranges from 7.36 kWp to 20 kWp across the models. Key specifications for a representative model (SIA-5kW/SIA-6kW) include a maximum input voltage of 600V, an MPPT voltage range of 50-60V, and two Maximum Power Point Trackers (MPPTs).
- Battery: The standard battery pack is a 4.992 kWh LFP module with a voltage range of 80-100V. The maximum charge and discharge current is 50A, enabling high-power energy transfer.
- AC Input/Output: The systems are designed for standard single-phase grids, with rated output voltages of 220V/230V/240V and frequencies of 50/60Hz. They exhibit high efficiency, with a PV Europe efficiency of 97.1% and a total harmonic distortion (THDi) of less than 3% for grid output and less than 2% for EPS output, ensuring clean power.
- General Data: The system boasts an IP65 protection rating, allowing for safe installation both indoors and outdoors. It uses natural convection for cooling, has a compact form factor, and communicates via RS485/CAN. Control and monitoring are facilitated through an LED display and a mobile app. The product is designed to comply with a suite of international standards, including IEC 62619, IEC 62109, EN 50549, VDE-AR-N 4105, AS/NZS 4777.2, and G99, facilitating its deployment in markets across Europe, the UK, Australia, and beyond.
Conclusion
The WHES PP-S2 Residential All-In-One Energy Storage System is a meticulously engineered solution that addresses the core needs of the modern, energy-conscious homeowner. It successfully blends high performance (with fast backup switching and PV oversizing) with unparalleled emphasis on safety (through its built-in FSS and UL9540A compliance). Its scalable, modular design offers long-term flexibility, while features like the plug-in terminals, quiet operation, and cold-weather options prioritize a seamless and user-friendly experience. As a complete, certified, and intelligent system, the PP-S2 is positioned as a reliable and powerful tool for achieving greater energy self-sufficiency, resilience, and control over household electricity costs.
