Hey everyone! I'm trying to figure out how to properly pair my solar panels with a King's BatBlock 25. The manual mentions that the solar input capacity is limited to 300 watts. Does this mean I shouldn't use solar panels that exceed 300 watts, like the XTM 320 watt panels? Or are there other specifications, such as voltage, I need to keep in mind while making this decision? Any guidance would be appreciated! Thanks!
3 Answers
Yeah, you can actually go a bit over on the panels as long as they don’t exceed your controller's voltage input. The controller can manage the extra wattage to prevent overcharging your batteries. Just keep in mind that during sunny days, having more capacity can help on those cloudy days later!
In general, the voltage is the most critical factor to watch. As long as the voltage from your solar panels is under the limit, you should be good. Your solar charge controller will automatically adjust the amps based on battery needs, so you don’t have to worry about overloading it too much as long as you stay within voltage specs!
You definitely need to consider both voltage and current. Your BatBlock's manual suggests a max input voltage of 32V and max current of 27A. So when looking for panels, make sure the specs follow that! If the open circuit voltage is under 32V and the short circuit current is under 25 amps, you should be set. Just remember, you won't get to use the full 300 watts under every condition.