Commercial and industrial energy storage
Commercial and Industrial Energy Storage
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Home Energy Storage
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Drones
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Telecom Backup Power
Low-Speed Electric Vehicles
Low-Speed Electric Vehicles
Compact RV Travel
RV Power
forklift
Forklift Truck
Lead To Lithium Conversion
Lead To Lithium Conversion

ALL-IN-ONE Residential Energy Storage System

A comprehensive home energy solution combining battery storage and intelligent control. It supports both off-grid and grid-tied operation, with a modular design that allows for capacity expansion as needed. Engineered for excellent environmental resistance, it ensures reliable power in all weather conditions.

All-in-One Residential Energy Storage System

System Voltage: 48 V

Rated Capacity: 200Ah

Grid Connection: Off-grid / Hybrid

Type: All-in-One (Integrated)

Battery Type: LiFePO₄ (Lithium Iron Phosphate)

Weight: 85 kg

Dimensions: 480 × 280 × 1071 mm

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Applications

Smart Kitchen Power
Smart Kitchen Power

Stable power supply that supports multiple high-power appliances running simultaneously.

Vehicle-to-Home (V2H)
Vehicle-to-Home (V2H)

Connect your electric vehicle and home energy—your car can even supply power back to the house in emergencies.

Time-of-Use Price Arbitrage
Time-of-Use Price Arbitrage

Smart charge and discharge strategies automatically select the best times to store and use energy.

Zero-Carbon Community Units
Zero-Carbon Community Units

Participate in a community microgrid to share clean energy with your neighbors.

Whole-Home Off-Grid Power
Whole-Home Off-Grid Power

A combined solar and storage system that enables complete energy self-sufficiency for your home.

Disaster Emergency Power
Disaster Emergency Power

A vital power lifeline for your home during extreme weather events like typhoons and earthquakes.

FREE DESIGN

Customized exclusive battery plans! Professional engineers plan battery programs one-on-one.

Maximize Drone Effect with Our Tailored Battery Solutions

德国EES-Propose Requests_结果
Propose Requests
Customized Solutions_结果
Customized Solutions
End-to-End Controlled Production & Testing_结果
End-to-End Controlled Production & Testing
Warehouse and shipped out_结果
Warehouse and shipped out

Explore Herewin Factory: The Source of Quality

Founded in 2019, Shenzhen Jarwin Time Technology Co., Ltd. is backed by a founding and operational team with over 20 years of extensive experience in the battery industry. It specializes in developing and producing high-performance lithium-ion polymer batteries.
Gain a comprehensive insight into who we are and what we stand for. By exploring the meticulous precision of our
production lines, the efficient management of our factories, and the genuine feedback from our satisfied customers,
you’ll see how we ensure excellence at every step of the process

Different Services For Clients With Different Patterns

FOR OFFLINE CLIENTS

Flexible Delivery Time

Reliable delivery schedules and warehousing support.

High Cost-Effectiveness

Competitive pricing to maximize overall value.

Wide Product Selection

Diverse options to cater to all market segments.

FOR ONLINE CLIENTS

Low MOQ

Flexible MOQ with mixed product options.

Custom Logo

Personalized logo customization for small batches.

One-Stop Marketing Package

Provide quality images, videos to enhance sales revenue.

FOR BRAND CLIENTS

Exclusive Regional Rights

Provide all of herewin's resources and capabilities

R&D Resources

Custom sample within 7 days with R&D capabilities.

Fast Delivery

Efficient production and ship within 25 days at the fastest.

Production Flow of Home Energy Battery​

Step1:Unpack-Materials_结果
Step1:Unpack Materials

Open packaging, sort components.

Step2:Full-Visual-Inspection_结果
Step2:Full Visual Inspection

Inspect grouped cells for defects: leakage, scratches, dents, punctures, swelling.

Resistance Screening
Step3:Voltage/Resistance Screening

Test cell voltage and internal resistance; rebalance cells with excessive voltage deviations.

Step4:Tab-Punching_结果
Step4:Tab Punching

Punch holes in cell tabs using a stamping machine.

Step5:Adapter-Board-Assembly_结果
Step5:Adapter Board Assembly

Mount cells onto adapter boards per specs, secure tightly with fiber tape.

Step6:Tab-Alignment_结果
Step6:Tab Alignment

Fold tabs in half with a rubber mallet and align holes with PCB board positions.

Step7:Screw-Fastening_结果
Step7:Screw Fastening

Secure aluminum plates to adapter boards with screws; verify torque.

Step8:Fiberboard-Installation_结果
Step8:Fiberboard Installation

Wrap battery module with fiberboard and seal edges with fiber tape.

Step9:Casing-Integration_结果
Step9:Casing Integration

Tilt module into lower casing, secure series wiring by loosening screws incrementally, apply silicone adhesive, fix top fiberboard, then fully insert into casing.

Step10:Wiring-Connection_结果
Step10:Wiring Connection

Plug sensing wire terminals into sockets and secure with adhesive.

Step11:Performance-Testing_结果
Step11:Performance Testing

Use a voltage tester to measure the maximum and minimum cell voltage difference of the battery pack (≤15 mV), followed by open-circuit voltage, AC impedance, and charge/discharge (including overcurrent) tests.

Step12:Aging-Cycle_结果
Step12:Aging Cycle

Stabilize performance through cycling and screen for defects pre-final assembly.

Step13:Cover-Installation_结果
Step13:Cover Installation

Attach top cover to casing with screws.

Step14:Comprehensive-Functional-Testing_结果
Step14:Comprehensive Functional Testing

Verify communication, output voltage, temperature sensing, discharge curves, and leakage.

Step15:Final-Visual-QA_结果
Step15:Final Visual QA

Inspect surface for flaws, check display buttons for smooth operation (no sticking).

Step16:Packaging_结果
Step16:Packaging

Label units, place in foam-lined boxes, seal in PE bags with desiccant, add top foam padding.

Step17:Shipping_结果
Step17:Shipping

Box approved units and dispatch.

LEARN MORE DETAIL

Learn more about production details and manufacturing process

Testing Process

Fair&Certification

Certifications are herewin’s greatest strength.
Meets the needs of all markets, and the source factories are fully certified to ensure quality

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GET IN TOUCH

Want to know what credentials your market needs? Contact me to send you a high resolution image

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Commercial &Industrial Energy Storage Solutions

FAQs

What if solar charging is insufficient on cloudy or rainy days when using the whole-home off-grid power system?

Choose a large-capacity battery (48V 1000Ah) and connect an external generator as backup. On rainy days, prioritize essential loads like lighting and the fridge, and reduce use of high-power appliances.

How can I extend battery life in a whole-home off-grid setup?

Keep charge levels between 30% and 80%, routinely inspect wiring, and clean solar panels. Add a smart battery management system for automatic balancing and longer lifespan.

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Our New Catalogue

Learn more about Home Energy Storage solutions, and the full range of products

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