In this video, I'm reviewing the OptiSolex S1 MPPT charge controller – a game-changer for anyone looking to charge LiFePO4 batteries with solar panels. After reviewing the 440W Solar Bag from OptiSolex, this compact, plug-and-play charge controller caught my attention. Unlike power stations with built-in charge controllers, LiFePO4 batteries require either an AC charger or a dedicated charge controller to accept solar power safely. The S1 fills that role perfectly, and I'm already planning to get a second unit for my setup. What makes the S1 stand out is its incredible portability and ease of use. This solidly-built, IP68-rated controller boasts up to 99.5% tracking efficiency and 98% conversion efficiency, with auto-detection for 12V, 24V, and 48V battery systems. It's incredibly compact, operates in extreme temperatures from -40°F to 159°F, and comes with a 10-year warranty. The plug-and-play design means setup is as simple as connecting your battery terminals first, then your solar panel – no complicated programming required. Plus, when you use 2-3 units together, you get anti-shadow technology and the ability to mix and match different solar panels. I tested the S1 across three setups to demonstrate its versatility. First, I connected it to the 440W OptiSolex Solar Bag, which fits perfectly in the bag's zipper pocket for true portable power. Second, I demonstrated a simple DIY battery box setup – a low-cost power station alternative that's perfect for solar lights, gates, or basic emergency power. Third, I integrated it into my DIY power station battery bank and compared its performance head-to-head against both a 10-amp PWM controller and a Renogy Rover 30-amp MPPT. The results were impressive: the S1 pulled over 5 amps while the PWM only managed around 4 amps with the same 100W panel. From a preparedness perspective, the S1 is an excellent addition to any emergency power system. Its compact size makes storage easy, and the ability to daisy-chain multiple units means you can scale your solar charging capacity when needed. I'm planning to add a second S1 to my system so I can connect the 440W Solar Bag during emergencies and effectively double my charging wattage. Whether you're building a battery-powered gate, setting up exterior solar lights, or creating a complete off-grid power system, the OptiSolex S1 delivers professional-grade MPPT charging in an incredibly user-friendly package. OptiSolex Solar Brick OptiSolex Solar Bag & S1: https://optisolex.com/products/optisolex-400w-portable-solarbag-kit?variant=46396465611009&utm_source=KOL&utm_medium=YT_TheBugOutLocation_Nov11 Optisolex S1 Solar Brick: https://optisolex.com/products/optisolex-solexbrick-s1-50-amp-mppt-solar-charge-controller Buy on Amazon: https://amzn.to/3K7Urj0 Other Products Mentioned... 200W Mountable Solar Panel https://amzn.to/4a0Pmne Power Queen LFP Battery https://amzn.to/43yF4a8 1500 Watt Inverter https://amzn.to/48njYOw Aferiy P210 Power Station https://amzn.to/49Zc7YD Visit Our Websites... The Bug Out Location: https://thebugoutlocation.net/ MySurvivalfoods: https://mysurvivalfoods.com/ SurvivalistPrepper: https://survivalistprepper.net/ Visit our Amazon Storefront for More Supply Recommendations: https://www.amazon.com/shop/survivalistprepper?ref_=cm_sw_r_cp_ud_aipsfshop_90QA9VD7YBVV95P6DFXJ NOTE: Most of the hyperlinks to products included on my channel are affiliate links, which means that I make a small percentage of the sales if you purchase an item after clicking one of the links from my channel. This comes at no cost to you. As an Amazon Associate, I earn from qualifying purchases. All the money I get goes towards funding my channel's costs, such as production equipment and new gear to test. Thank you for supporting my channel! #OptiSolex #440WPortableSolarBagKit #portablesolarpanel #SolarBlanket #400W #SolexBrickS1 0:00 S1 Overview 2:22 Specs 6:00 440W Solar Bag 9:45 Simple Setup 11:29 DIY Battery Bank 13:13 Double Wattage