Flex 100i Portable Solar Panel: What Can It Charge?
By Portable Power Stations, Solar Generators | Published: 2026-10-23
Category: Product Reviews
Wondering what the Flex 100i solar panel can power? This guide covers compatible devices, charging times, and real-world trade-offs for van life and overlanding.
Quick answer
The Flex 100i is a 100W flexible solar panel best for topping off a Yeti power station or charging small devices during van life or overlanding, but it won't fast-charge a large power station on its own.
Why flexible matters for your setup
Unlike rigid glass panels, the Flex 100i bends to fit curved roofs on vans, RVs, and overland vehicles. This opens up mounting options where a flat panel won't work. However, the flexible design can be less efficient in partial shade and may not last as long as a rigid panel in permanent installations.
Charging a Yeti power station: what to expect
The Flex 100i can charge a Yeti 1000X in 12-24 hours and a Yeti 1500X in 18-36 hours under ideal sun. That's fine for slow top-ups or extended trips, but not for a quick recharge. For faster charging, you would need multiple panels or a higher-wattage setup.
Surface and cable requirements
The Flex 100i is IP67 waterproof, so it can handle rain and dust. To connect it to a Yeti, you need the MC4 Solar to HPP Adapter Cable (sold separately). Without this cable, the panel cannot plug directly into the power station.
Decision rules for the Flex 100i
- Charge a Yeti power station: Use the Flex 100i with the MC4 to HPP adapter cable. Expect 12-36 hours for full charge depending on the Yeti model. Best for topping off over several days.
- Charge small devices directly: The Flex 100i does not have a USB port, so you cannot plug phones or tablets directly into the panel. You need a power station or solar controller in between. If you want direct USB charging, look for a panel with built-in USB outputs.
- Mount on curved or flexible surfaces: The panel bends to match the curve of a van roof or overland vehicle. Secure it with adhesive or mounting brackets designed for flexible panels. Avoid sharp bends that could damage the cells; follow the manufacturer's bend radius.
- Use in a multi-panel array: You can connect multiple Flex 100i panels in parallel or series to increase total wattage. This reduces charge time for larger Yeti models. Check your Yeti's maximum input voltage before wiring in series.
Product facts
- Flex 100i: The Flex 100i is a flexible monocrystalline solar panel that works on flat and curved surfaces for mounting on vans, RVs, and overland vehicles. It has an IP67 waterproof rating. This lets you install solar on surfaces where a rigid panel cannot fit, such as a curved camper roof, while still being weatherproof for outdoor use.
Flex 100i
Who should buy the Flex 100i?
Best for
- Van lifers and overlanders who need a panel that conforms to a curved roof
- Campers who want a lightweight portable panel for slow top-ups of a Yeti power station
- Users who already own a Yeti and the MC4 adapter cable
Not for
- Users who need fast charging of a large power station (consider a 200W+ rigid panel or multiple Flex panels)
- People who want to charge phones or USB devices directly from the panel
- Permanent home installations where a rigid panel would be more durable and efficient
