Uploaded July 2026 | Updated September 2026, 2 weeks ago
Putting a portable power station through a real world solar charging test with the OptiSolex 440W foldable SolarBag and the Oupes Mega 3. This panel splits into two independent 220W sections, uses N-type solar cells rated at 25% efficiency, and claims a true 440W output at 42V and 11.2A through MC4 connectors. But claimed output and actual delivered watts into a real power station are two very different numbers, and that gap is exactly what this test is built to expose.
Spec sheets tell you what a solar panel can theoretically produce under lab conditions. They do not tell you what happens when the sun angle shifts, when clouds roll through, when the panel is laid flat instead of angled, or when your specific power station's MPPT controller decides how much of that power it will actually accept. This video walks through setting up the OptiSolex SolarBag, connecting it to the Oupes Mega 3, and logging the actual charging wattage over time so you can see the real numbers instead of the marketing numbers.
This is part of an ongoing series testing portable power gear the way it actually gets used in the field, whether that is for off grid ham radio operation, emergency communications, RV living, or general outdoor power needs. If you are considering a foldable solar panel for charging a power station, this test should give you a realistic baseline for what to expect before you buy.
Topics covered include unfolding and setup of the OptiSolex 440W SolarBag, real time charging wattage readings on the Oupes Mega 3, how panel angle and sun position affect output, splitting the bag into individual 220W panels, and overall thoughts on portability versus rigid panel setups for field and off grid use.
🔹My Favorite Gear - amazon.com/shop/km4ack
🔹Links mentioned in the video
Solar Panel - amzn.to/4x3XpYJ
Power Station - oupes.com/KM4ACK-MEGA3
🔹Weekly Newsletter - https://mailchi.mp/40da1fe472e3/km4acknewsletter
🔹Follow Me
Twitter @km4ack
🔹Cool Ham Gear - km4ack.com
🔹Support the channel through Patreon - patreon.com/km4ack
🔹🔹🔹🔹🔹
As an Amazon Associate I earn from qualifying purchases
Putting a portable power station through a real world solar charging test with the OptiSolex 440W foldable SolarBag and the Oupes Mega 3. This panel splits into two independent 220W sections, uses N-type solar cells rated at 25% efficiency, and claims a true 440W output at 42V and 11.2A through MC4 connectors. But claimed output and actual delivered watts into a real power station are two very different numbers, and that gap is exactly what this test is built to expose.
Spec sheets tell you what a solar panel can theoretically produce under lab conditions. They do not tell you what happens when the sun angle shifts, when clouds roll through, when the panel is laid flat instead of angled, or when your specific power station's MPPT controller decides how much of that power it will actually accept. This video walks through setting up the OptiSolex SolarBag, connecting it to the Oupes Mega 3, and logging the actual charging wattage over time so you can see the real numbers instead of the marketing numbers.
This is part of an ongoing series testing portable power gear the way it actually gets used in the field, whether that is for off grid ham radio operation, emergency communications, RV living, or general outdoor power needs. If you are considering a foldable solar panel for charging a power station, this test should give you a realistic baseline for what to expect before you buy.
Topics covered include unfolding and setup of the OptiSolex 440W SolarBag, real time charging wattage readings on the Oupes Mega 3, how panel angle and sun position affect output, splitting the bag into individual 220W panels, and overall thoughts on portability versus rigid panel setups for field and off grid use.
🔹My Favorite Gear - amazon.com/shop/km4ack
🔹Links mentioned in the video
Solar Panel - amzn.to/4x3XpYJ
Power Station - oupes.com/KM4ACK-MEGA3
🔹Weekly Newsletter - https://mailchi.mp/40da1fe472e3/km4acknewsletter
🔹Follow Me
Twitter @km4ack
🔹Cool Ham Gear - km4ack.com
🔹Support the channel through Patreon - patreon.com/km4ack
🔹🔹🔹🔹🔹
As an Amazon Associate I earn from qualifying purchases
