As the world shifts toward renewable energy, solar technology has evolved from industrial equipment into everyday essentials. Two brands born in 2007—BigBlue and Letsolar—have each carved out a unique space in this growing market. With a focus on high-performance portable power and scalable solar solutions, they offer products that cater to outdoor enthusiasts, emergency preppers, and eco-conscious households alike.
BigBlue: Power for the Pleasure of Life
BigBlue’s philosophy centers on “high-performance, innovative, integrated energy solutions … for the pleasure of life.” Since its founding, the company has earned a global reputation for sustainable energy storage systems that combine engineering excellence with user-friendly design.
SolarPowa Solar Charger Series: Portable Efficiency
The SolarPowa series is built for on‑the‑go charging, whether you’re hiking, camping, or facing a power outage. Key features include:
- Japanese‑made ETFE layer: Offers exceptional UV permeability, allowing up to 95% of light to reach the solar cells while maintaining corrosion and stain resistance. Energy conversion reaches up to 23%.
- Intelligent charging technology: Automatically detects connected devices and delivers optimal charging speeds.
- Durable construction: Crafted from high‑density 900D polyester Oxford fabric with an IP68 water‑resistant rating (excluding the junction box) and scratch resistance. Overcurrent, overheating, and short‑circuit protection ensure safe use.
- Portable and versatile design: Lightweight with grommet‑reinforced loops, the panels can be attached to backpacks, tents, or trees using carabiners—perfect for keeping devices powered in remote locations.
These solar chargers are fully compatible with BigBlue’s CellPowa portable power stations, creating a seamless off‑grid energy ecosystem.
CellPowa Portable Power Station Series: EV‑Grade Energy Storage
The CellPowa series brings automotive‑grade battery technology to portable power. It is designed for users who need reliable, high‑capacity energy for home backup, outdoor activities, or heavy‑duty appliances.
- EV‑grade LiFePO₄ battery: Delivers a lifespan 4‑5 times longer than traditional batteries, with over 4,000 cycles. The chemistry is safer, more stable, and reduces overall weight.
- Bi‑directional pure sine wave inverter: Allows simultaneous charging and discharging—a feature not found in all portable power stations.
- Intelligent MPPT algorithm: The built‑in Maximum Power Point Tracking controller optimizes solar input in real time, capturing up to 98% of available solar energy.
- Utmost‑B charging mode: Boosts power output to 3,500 watts, supporting over 90% of home appliances and demanding outdoor devices.
- Uninterruptible Power Supply (UPS): When grid power fails, the CellPowa switches to battery power in just 10 milliseconds, ensuring continuous operation of critical equipment.
Letsolar: Full‑Spectrum Solar Manufacturing
Also established in 2007, Letsolar has built a vertically integrated manufacturing footprint with headquarters in Huizhou, China, and multiple factories in Vietnam. The company offers everything from flexible solar modules to rigid panels, solar chargers, power banks, and portable power stations—with strong customization capabilities.
Solar Panel Portfolio: From Flexible to Rigid
Letsolar’s product range covers diverse installation needs, from curved surfaces to fixed rooftops.
| Series / Model | Key Specifications | Best For |
| Lightweight Flexible Solar Module | Customizable; ultra‑thin, bendable design | Rooftops with curved surfaces, boats, RVs |
| Lightweight Rigid Solar Panels (LJM2‑100W5, LJM2‑140W, LJM4‑280W) | 100W–280W; efficiency 22%‑24%; weight as low as 3.9 kg; LJM4‑280W features bifacial technology for dual‑side power gain | Portable folding setups, mobile power stations |
| ETFE Solar Charger (LYM5‑010W1) | 0.235 kg, 2 mm thickness, folded size 232×81×35 mm; efficiency 22.5%; built‑in hanging holes | Pocket‑sized charging for phones and small devices |
| Rigid Solar Panels (LJM1‑007W / LJM2‑100W / LJM1‑370W) | 7W–370W; glass surface; durable aluminum frame | Fixed residential or commercial installations, balcony solar systems |
Solar Power Banks: Integrated Charging & Storage
Letsolar’s LET series combines solar panels with built‑in batteries, offering true self‑sufficiency.
| Model | Capacity | Solar Panel | Key I/O Features |
| LET 153 | 10,000mAh | 1.3W | USB‑A + Micro USB input; LED light |
| LET 153 Pro | 10,000mAh | 1.3W | PD 20W input/output via USB‑C |
| LET 166C | 15,000mAh | 8W (removable) | PD 18W; dual USB‑A outputs |
| LET 166D | 25,000mAh | 8W (removable) | PD 20W; large capacity for multiple devices |
Mini Portable Power Station: LA02
The LA02 bridges the gap between a power bank and a full‑size power station.
- Capacity: 100Wh
- AC output: 85W (110V/220V pure sine wave)
- Fast charging: PD 45W input/output via USB‑C; DC 15V/2A input
- Compact size: 156.5×121.5×34mm
- Ideal for: Laptops, drones, small appliances, and short trips.
Quality You Can Count On
Both brands emphasize manufacturing excellence. BigBlue has sold over 4 million units worldwide—a testament to its quality and reliability. Letsolar operates state‑of‑the‑art facilities with more than 20 lamination machines and has earned certifications such as ISO9001, ISO14001, and even MFI certification from Apple Inc., reflecting its commitment to precision manufacturing.
Conclusion: Two Brands, One Sustainable Future
BigBlue and Letsolar represent two complementary approaches to solar energy:
- BigBlue focuses on end‑user experiences, delivering sleek, intelligent, and highly integrated portable power solutions for outdoor adventures, home backup, and everyday convenience.
- Letsolar leverages its deep manufacturing capabilities to offer a wide spectrum of solar products—from flexible panels to custom power banks—serving both individual consumers and large‑scale project partners.
Whether you need a lightweight solar charger that fits in your pocket or a robust power station capable of running household appliances, these brands provide the technology, durability, and innovation to turn sunlight into reliable power. As renewable energy continues to shape our future, products like these make sustainable living not just possible, but genuinely enjoyable.