![]() ![]() Or, if you’re willing to pay a little extra, some controllers have remote access so you can control the device from any location. For example, multi-voltage function-enabled controllers let you adjust the charging voltage set point so the device operates more effectively. There are several additional features that can enhance a solar controller and add convenience for the user. Whether it’s lead acid, sealed lead acid (AGM and Gel), or lithium-ion, you’ll want to ensure that the solar charge controller is compatible in order for the controller to function. It’s important to consider what type of battery you’ll be charging. On the other hand, MPPT controllers measure the solar panel’s voltage which is then down-converted to match the battery’s voltage, helping to increase the current. A PWM controller works by establishing a direct connection between the solar panels and the battery. The charge controller’s technology is available in two options: pulse width modulation ( PWM) and maximum power point tracker ( MPPT). Using a solar charge controller with too few amps can negatively affect the system, but using a controller that’s larger than you need will not cause any issues. When in doubt, it’s always better to go too big than too small. To calculate the current capacity required, figure out how many amps your system normally produces and add 25 percent to account for temporary increases in current levels. The size of the solar charge controller will depend on how many watts you need to collect from the sun. If a solar controller is the missing part of this equation to install your system, there are several things to consider before purchasing one. ![]() Off-grid solar power systems have four major components : a solar panel for collecting energy, a charge controller for regulating it, a battery for storage, and an inverter for use. What to Look For When Choosing the Best Solar Charge Controller
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