Discover Carku's B2B customization process for portable power solutions:from tailored Wh capacity selection for specific applications to scalable configurations ensuring long-term ROI. We deliver quality consistency,comprehensive after-sales support,and flexible power options for distributors.

How We Customization Portable Power Solutions | Carku

As ODM battery manufacturer, there is one floor(几层的) workshop to manufacture portable power stations, worshop-hand staff standing and sit down in battery pack production line.

As a leading ODM battery manufacturer, Carku operates a more than 30,000 ㎡ dedicated facility for portable power station production. Our automated battery pack production line spans across multiple zones:

1. · Battery Testing Area: Incoming lithium battery cells undergo rigorous capacity verification and safety screening.
2. · Manual assembly line: Skilled technicians assemble battery packs with precision welding and BMS integration.
3. · Aging & Calibration Workshop: Each unit undergoes 48-hour burn-in testing to ensure output stability.
4. · Quality Control Stations: At each production stage, QC staff perform voltage testing, insulation checks, and output calibration.
5. · Final Packaging Zone: Completed units are sealed with anti-static packaging after passing 100% full-function testing.

Our production line maintains a daily output capacity of mass units, with flexible scalability to meet bulk orders.

 

How Do You Determine the Right Wh Capacity for Different Applications?

Our engineers calculate the required Wh capacity using the formula:

Required Wh = (Device Wattage × Runtime Hours) ÷ Battery Efficiency (typically 85–90%)

Example Calculation:

For a 60W car refrigerator operating 10 hours per day:

60W × 10h ÷ 0.85 = ≈706Wh minimum

However, for power outage or emergency backup use, it’s essential to include additional buffer capacity to account for:

Efficiency loss during inverter conversion and temperature fluctuations

Gradual battery degradation over time

The need for continuous operation during longer outages

Therefore, we recommend a 1000/1200Wh portable power solution to ensure stable cooling performance and extended runtime during unexpected power failures.

 

Once the capacity is determined, Carku engineers fine-tune the battery management system (BMS) to:

 

Optimize discharge curves for refrigerator load characteristics

Set intelligent low-voltage cutoffs to protect battery lifespan

Apply temperature-compensated charging for reliable performance in both hot and cold climates

 

This approach ensures every customized power solution delivers the right balance of capacity, reliability, and durability, tailored for real-world B2B applications.

What Customization Options Ensure Long-Term ROI and Scalability for B2B Distributors?

Carku's distributor-focused customization begins with the use of LiFePO4, battery cells,which outperform traditional lead-acid batteries in cycle life, thermal stability, and long-term usage. This foundation ensures cooler operation,higher efficiency, and extended service life-key factors for scalable and durable B2B solutions.

Enhanced ROI for distributors

LiFeP04's 3X Longer lifespan (3,000+cycles vs.500 cycles) cuts replacement costs and warranty claims, boosting ROI by 40%over 5 years. The modular, scalable design enables distributors to stock entry-level to premium units using the same core platform, reducing SKU complexity while expanding market reach.

Scalable solutions create Win-Win value

For distributors, the 3X longer lifespan reduces warranty claims and boosts profit margins. For end customers, modular battery expansion provides flexible power solutions from 99.9Wh to 3600Wh+, enables distributors to address the full portable power solution spectrum from travel-compliant rapid charging devices, through household emergency backup systems, to professional-grade high-wattage support, culminating in comprehensive off-grid power ecosystems for extended autonomy.

 

How Can Customized Portable Power Solutions Meet Quality Consistency and After-Sales Support?

Selling portable power solutions internationally requires navigating complex regulatory landscapes, a single missing certification can result in customs seizures, sales bans, or costly recalls.

Our approach removes this burden: Quality Control & Market Access Framework

Manufacturing Foundation:

- ISO 9001 / IATF 16949 certified facilities ensure batch consistency

- BSCI compliance guarantees ethical sourcing standards

Pre-Certified for Major Markets:

- USA/Canada: UL 2743, FCC Part 15 → immediate market entry

- European Union: CE, RoHS → customs clearance guaranteed

- Japan: PSE Round Mark → retail distribution approved

- Air/Sea Freight: UN38.3 → no shipping restrictions

After-Sales Support Framework:

Distributor Empowerment Tools:

- Technical troubleshooting guides and video training materials

- Direct support channels: Email (24-hour SLA), WhatsApp/WeChat hotline

- Online RMA portal for streamlined case management

 

Rapid Issue Resolution:

- Replacement parts: 48-hour dispatch for warranty claims

- Advanced replacement option: New unit ships before return received

- Repair turnaround: 5-7 business days average

 

Brand Protection Mechanism:

Co-branded warranty cards position distributors as premium partners

backed by manufacturer support—customers see your brand with OEM

credibility, enhancing retention and referrals.

 

Distributors never face customers alone. Our support infrastructure ensures technical issues become opportunities to demonstrate service excellence, not threats to your reputation.

 

In Conclusion

Our custom design and manufacturing capabilities protect both  wholesale distribution needs and tender-based procurement. We deliver what B2B partners require: application-specific capacity options (99.9Wh to 3600Wh+) matching end-user scenarios, scalable modular power solution proven to improve long-term ROI by 40%, and unwavering quality consistency (ISO 9001/IATF 16949 certified) backed by 48-hour parts response 1 year warranty protection. Whether responding to government tenders or building retail distribution channels, your partnership is secured by manufacturing commitment, not just product supply.