Peruvian Client 300W Modified Wave Energy Storage Power Supply Case Study

I. Client Background

The Peruvian client for this collaboration is a local trading company specializing in outdoor equipment and emergency power solutions. It maintains stable sales channels in major Peruvian cities such as Lima and Arequipa, serving outdoor adventure clubs, small manufacturing enterprises, and residential users. With increasing extreme weather events in Peru in recent years affecting grid stability, local consumers have seen a surge in demand for portable, high-efficiency emergency energy storage devices. Through market research, the client identified that 300W-range energy storage power supplies offer exceptional adaptability for home emergency lighting, powering small appliances (e.g., rice cookers, fans), and outdoor equipment (e.g., small power tools). Additionally, modified sine wave (MSW) technology storage solutions strike a better balance between cost and performance for the local mid-range market. The client previously attempted collaborations with suppliers from other countries but failed to establish long-term partnerships due to issues like inadequate product compatibility and delayed after-sales responses. Ultimately, they connected with us through an international exhibition, seeking a customized, cost-effective 300W modified sine wave energy storage power solution.

II. Collaboration Process

1. Requirement Communication Phase (August-September 2025): Through emails and online meetings, the client explicitly specified that the product must be compatible with Peru's AC 220V/60Hz grid frequency, incorporate overcharge, over-discharge, and short-circuit protection features, and weigh under 5kg to meet portability requirements. Our technical team, considering local climate conditions (high temperatures and humidity in certain regions), recommends optimizing battery cooling structure and enhancing the enclosure's waterproof rating (IPX3). We provide three preliminary design proposals, with the client ultimately selecting the solution featuring an LCD display (showing real-time remaining power and output power).
2. Sample Development and Testing Phase (September 2025): We completed sample production within 10 days. Beyond standard performance testing, we conducted an additional 72-hour continuous discharge test simulating Peru's high-temperature environment (45°C constant-temperature chamber), ensuring battery capacity degradation remained below 5%. After samples were shipped via international express, the client conducted 15 days of field testing. Feedback confirmed stable operation in outdoor high-temperature conditions, with only a minor adjustment requested: increasing USB output ports from 2 to 3 (to support simultaneous charging of multiple devices). We completed this sample optimization within 3 days.
3. Order Confirmation and Production Phase (September–October 2025): After confirming the samples met expectations, the client signed a purchase order for [specific quantity] units, agreeing to a payment structure of 30% advance payment and 70% balance payment (due upon successful inspection before shipment). Our production department established a dedicated manufacturing plan. Raw material procurement prioritized batteries and components compliant with international certifications (e.g., CE, RoHS). Sampling inspections were conducted every two hours during production to ensure a 100% pass rate. The production cycle totaled 15 days, completing two days ahead of the contractual deadline.
4. Inspection and Delivery Phase (October 2025): The client dispatched representatives to our factory for on-site inspection. A random sample of 20% of the products underwent performance testing and visual inspection, with all items meeting standards. We assisted the client with export customs clearance, marine cargo insurance, and other procedures. The shipment was transported by a reputable carrier from Ningbo Port, arriving safely at Callao Port, Peru, after 28 days. We also provided detailed product manuals and after-sales service guides.
5. Post-Sales Follow-Up Phase (November 2025 - Present): Within one month of delivery, our after-sales team communicates weekly with the client regarding product usage and addresses operational inquiries.

III. Product Details

1. Exterior Design: The body utilizes ABS fire-resistant material with a matte finish for slip resistance and scratch resistance; The color scheme features a deep blue preferred in the Peruvian market, paired with an orange brand logo for high visual recognition. A top-mounted carrying handle is designed with foam padding on the inner side for enhanced comfort, meeting the customer's “portability” requirement. The unit dimensions are 32cm × 18cm × 15cm, weighing 4.8kg, allowing easy storage in a car trunk or outdoor backpack.
2. Port Configuration: Features 1 AC output port (supports 300W modified sine wave output, compatible with Peru's 220V/60Hz grid), 3 USB-A ports (2 supporting QC3.0 fast charging at 18W output; 1 standard 5V/2.4A output), and 1 DC output port (12V/5A for car accessories), catering to diverse household and outdoor power needs. The central LCD display on the front panel clearly shows remaining battery percentage, output power, charging status, and other information, enabling real-time monitoring.
3. Safety & Protection: Features a built-in high-quality lithium battery (capacity [please specify, e.g., 100Wh/200Wh]), equipped with an intelligent BMS battery management system. Includes four safety protections: - Overcharge protection (automatically shuts off when charging voltage exceeds 13.8V) - Over-discharge protection (automatically shuts off when discharge voltage falls below 10.0V) - Short-circuit protection (disconnects circuit within 0.1 seconds of short-circuit detection) - Over-temperature protection (pauses operation when body temperature exceeds 60°C) The housing achieves an IPX3 waterproof rating. short-circuit protection (circuit disconnection within 0.1 seconds of short-circuit occurrence), and over-temperature protection (suspends operation when body temperature exceeds 60°C). The housing achieves an IPX3 waterproof rating, withstanding light rain splashes and adapting to usage scenarios in Peru's rainy regions.

IV. Technical Specifications

V. Case Images and Video Showcase

300W Modified Wave Energy Storage Power Supply Outdoor Application (Powering electric fans and LED lights at an outdoor campsite in Peru)

Product Packaging (Neatly packed products)

VI. Customer Testimonials

“Our collaboration with this supplier exceeded expectations! From initial requirements discussions to final product delivery, their technical team consistently responded swiftly to our needs—such as customizing optimizations for Peru's grid frequency and high-temperature environments—making the product highly competitive in the local market. During sample testing, they demonstrated rigorous attention to detail, completing USB port quantity adjustments in just 3 days with remarkable efficiency.”— — Peruvian Client

"After product delivery, we promoted it in the Lima market with excellent consumer feedback. The LED display showing real-time power levels particularly addressed the pain point of traditional energy storage systems where users couldn't monitor remaining capacity. The after-sales team provided timely follow-up—once when a customer reported a charging issue, they resolved it within 10 minutes via video guidance, significantly boosting customer satisfaction. Currently, monthly sales of this 300W modified sine wave energy storage power supply have exceeded 30 units, and we plan to place an additional order next month!" — Sophia, Sales Manager, Peruvian Client