Product Review

Lion Energy – FTB 50 Solar Generator

FTB 50 Generator
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The Lion Energy FTB 50 is a lithium battery solar generator and the followup to the successful L-1500 fuelless generator.

Product Description

Coming off the success of their massive hit, the L-1500, Lion Energy (owned by Food For Health International) has recently released their “new and improved” solar generator: The FTB 50. Others are calling this generator the “Expandable Fuel-Less Generator” because of the optional external battery pack.

The FTB 50 Solar Generator is a compact, lightweight piece of equipment perfect for any need, whether your next camping trip, an evening power outage, or in the time of a natural disaster. The Lion Energy FTB Generator provides the electrical power you need in any type of off-grid or emergency situation, making essential electric tools useful when they might otherwise be powerless.

Just like the L-1500, the FTB 50 uses a lithium battery pack for superior performance and connects to an optional solar panel for charging when no other power sources are available.

Generator Specs

  • Internal lithium battery pack: 50A/h (600W/h) capacity
  • Cycle life: 2000 cycles
  • Minimum charge time: 2.5 hours
  • Charge retention: 1 year
  • Integrated inverter: 120V AC pure sine wave, 1500W continuous, 2000W peak (5 millisecond peak)
  • Integrated charge controller: maximum of 35A charging current from AC and DC circuitry combined
  • Charge to the internal battery from the AC Charging Circuitry: 20A @ 15.0V DC
  • Max DC output current: 30A @12V DC
  • Max DC Input current: 15A @ 12V–15V DC


  • Height: 13.375 inches (339.73 mm)
  • Width: 9.375 inches (238.13 mm)
  • Depth: 15.875 inches (403.23 mm)
  • Weight: 45.8 lbs (20.77 kg)

Battery Specs

  • 12V DC
  • 50A/h
  • Lithium-based

Input/Output Ports

Input Ports:

  • AC: 110V–120V 50–60Hz
  • Anderson power pole: 1 port, total of 15A limit using 12V DC input

Output Ports:

  • AC: 110V–220V 50–60Hz; two outlets share a combined total current limit of 1500W, with 2000W peak for less than 5 milliseconds
  • USB: 4 USB outlets, each capable of 3A at 5V DC, with a shared total current limit of 12A (60W Max Output)
  • Anderson power poles: 1 output with a total of 20A @ 12V DC current limit (240W max output)
  • DC: 12V Cigarette lighter adapter, capable of 10A output (120W max output)


New Features

So what’s new with the FTB 50? How does it differ from the L-1500?

Power Supply Mode:

PASS mode has been upgraded to UPS (uninterruptible power supply) mode. No indication will be given on the screen, but when plugged into external AC power, this input will be “passed” straight to the output (without using the inverter) to avoid putting unnecessary life cycles on your battery and unnecessary strain on the inverter. Now, switching back and forth between external and internal power is almost instantaneous (less than 20 milliseconds), meaning that your devices won’t lose power when switching from external power to battery backup or vice versa.

Note: The battery must be charged for this to work.

External Battery Pack:

What’s better than having a solar power generator? A solar power generator with an extra battery! That’s right, the FTB 50 contains a new external pack expansion port fitted for an external 100A/h battery pack to use with your generator. It’s called the FTBX 100 Solar Generator Battery Expansion. Whenever connected, it functions as if you had three internal batteries. Outputs will now drain the external pack first. Once the external pack is empty, it will immediately switch to using the internal battery. When charging, your unit will fill its internal battery first. When the internal battery is full, it will immediately switch over and start charging the external pack.

Note: Do not try to charge the external pack separately from the generator without using the designated charger provided by Lion Energy.

Improved LCD Screen:

While the L-1500 was certainly sleek and sturdy, it was lacking in the screen/interface department. With the FTB 50, Lion Energy has upgraded to a very functional LCD screen. The user interface will show output power for each set of outputs (120V AC, 12V DC, and USB) and input power when charging. When external battery is connected, screen will show the current charge status of both batteries. The screen also shows the current battery temperature.


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$2,499.99 $1,989.99

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