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OutBack Power FLEXmax FM100-300VDC 100A 300Vdc MPPT Charge Controller
OutBack Power FLEXmax FM100-300VDC 100A 300Vdc MPPT Charge Controller
Outback, FM100-300VDC MPPT Charge Controller, 100A, 300VDC, 24/36/48Vdc, 3R enclosure, integrated GFCI & AFCI,FM100-300VDC-AFCI
Higher voltages from PV arrays are accepted by the Outback Power FLEXmax 100 AFCI 300VDC Charge Controller, allowing for longer wire runs and smaller wire sizes. It can charge 24/36/48 VDC battery systems with a voltage of up to 290VDC from PV arrays, but it can also withstand voltages of up to 300VDC without damage. The FLEXmax 100 charges batteries faster and helps owners to sell power to the grid more easily, increasing their return on investment. The performance is rated at 100A at 77°F, with four-stage charging and a wide operating temperature range. Internal components are protected from dust and moisture by the NEMA 3R architecture, which allows for outdoor installation.
The FM100-300VDC-AFCI can be used in negative, positive, or floating ground systems. Due to ample wire bending space and oversized terminals, larger gauge wire is easier to mount. It does not need an external GFP system because it has built-in PV ground fault detection, interruption, and indication. Since the FM100-300VDC-AFCI has no onboard display, an OutBack Power MATE3s or AXS Card MODBUS/TCP interface is required to program the controller and access the 128-days of built-in data logging history, as well as the programming and monitoring system functions. Thanks to OutBack network communications and OPTICS RE, the FLEXmax 100 can be remotely configured, monitored, and controlled from any internet-connected device. It is essential to use a remote temperature sensor (RTS), which is not included in the kit. Outback Power is UL certified and comes with a 5-year warranty.
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Product contribution
Using solar energy products significantly reduces your electricity costs over time. They harness free and renewable sunlight, making them a smart choice for your wallet and the planet. Investing in solar-powered solutions means saving money while enjoying reliable and eco-friendly convenience.
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About stock
Since our products are constantly on sale, there is a rapid depletion of stock.
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Reduce your carbon footprint while enjoying modern comfort and efficiency. Their smart, solar-powered technology keeps you connected and confident anywhere. Feel the power of renewable energy in your hands, empowering your every adventure.

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Questions
Can I use it indoors?
Yes, it works indoors once charged, but it needs sunlight exposure to recharge.
Does it support fast charging?
Some models support fast charging via USB; check the specifications.
Can I use it while it’s charging in the sun?
For safety and efficiency, it's best to use it after charging is complete.
Is it safe for kids to use?
Yes, solar products are safe for children under supervision, as they operate at low voltage.
Customer Reviews
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U***R | 22 Jun 2025
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⭐⭐⭐⭐⭐
They came very fast and good packing and working very well. -
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G***O | 13 Jan 2025
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⭐⭐⭐⭐⭐
They arrived in good condition, good lighting and sensor detection.