Those that are only compatible with 20-30A have a smaller capacity than those rated at 80A or higher.

The number of amps that your controller will feed to your devices from the battery bank is important because it determines what type and size of devices you can charge with your solar panels. A higher max input will also account for varying weather patterns. The best solar charge controllers are those with a higher max input voltage so users can scale their systems depending on their lifestyle. This would require an even higher max input voltage for the controller in order to compensate for the extra power. Not only that, but some homeowners or business owners may want to connect multiple panels to create a grid-tie system. Most panels don’t actually run at their rated voltage because the power generated by the sun can vary depending on different factors, such as how bright the sun is. While it may appear that a 12-volt panel would be compatible with a 12-volt battery bank, that’s not the case.

The battery voltage capacity must meet your individual needs, but we also consider the ability to scale your system up if that’s what you’re looking for. The standard is 12VDC, but for those running very large systems, like compounds or entire households, a higher voltage capacity is necessary. However, some may need a capacity of 60V or 72V. Most battery charging units fall within the 12-48VDC range. These are sometimes more suitable for those looking to devise simple systems to power solar lanterns in a garden or a mobile device. However, we’ve also included a few PWM controllers as high-quality options. MPPT controllers are widely accepted as the best of the best, so they inherently top our list. The type of the solar charge controller refers to whether it’s an MPPT or PMW model. How We Ranked the Best Solar Charge Controllers Type Each type serves its own purpose, but ultimately the MPPT controllers are more commonly used. There are two main types of solar charge controllers: Maximum Power Point Tracking (MPPT) and Pulse Width Modulation (PWM). If there’s no regulation, the batteries can be easily damaged, which will cost you money and time to fix. It’s important to use a charge controller as it improves the efficiency of a solar-powered system by up to 50%, can prevent the batteries from being overcharged, and will extend the battery’s life when used correctly. To put it simply, a solar charge controller regulates the power that’s transferred from a solar panel to a battery. Check Price What is a Solar Charge Controller?Ī solar charge controller prevents the battery from overcharging by regulating the voltage and current coming from the solar panel. Check Price Best Budget Option: MOHOO 30A Charge Controller This isn’t only the most affordable on our list, but one of the perks is that you can use it directly to charge phones or other small devices. It actually makes it our best option for small systems. Check Price Best Charge Controller for Small Systems: Renogy Wanderer This is the first PMW charge controller on our list, but that doesn’t mean that it isn’t effective. This option will be your best friend if you need a reliable controller and live in places where strong sunshine isn’t common all year-round. Check Price Best for Cold and Cloudy Environments: Victron SmartSolar MPPT 100/50 Solar Charge Controller The title pretty much says it all. The price tag is the only reason we didn’t rate it as number one. Check Price Best for Guaranteed Safety: MidNite Solar Classic 150 Charge Controller One of the safest charge controllers in the market with a great warranty policy and a lot of extra features. Plus, it’s one of the most reliable options you’ll find. Check Price Best for Going Off-Grid: Outback Flexmax 80 FM80 MPPT 80 AMP Solar Charge Controller Due to its sturdy construction, we categorize this as the best option if you’re going off-grid. We have little to no complaints about its performance, and that’s why it’s at the top of our list. Product Details Our #1 Pick: EPEVER MPPT Charge Controller This is a highly efficient and affordable product perfect for any task.

17000 watt 12 volt magic battery