I recently got a basic Eco Worthy solar kit to power a light and fan in my outhouse. The kit includes a 16AWG cable for connecting the solar charge controller to the battery. However, the battery has a maximum charge/discharge current of 50A, and the solar charge controller is rated for 30A. With these specifications, I'm wondering if the 16AWG cable is safe to use. Also, should I incorporate a breaker or fuse with this setup?
3 Answers
With your solar setup, if you’re charging at 200 watts, you’ll be pulling around 16.66 amps, which is okay for a 16AWG cable over short distances (ideally under 1.8 feet to keep voltage drop minimal). However, if you plan on running this setup longer or at higher currents, consider upgrading to a thicker wire like 14AWG or 12AWG to prevent any issues. Also, adding a fuse is generally a good practice for safety!
You might want to switch to DC LED lights and a DC fan instead of using the inverter. It’ll streamline your setup and might save some energy in the long run!
You can also look up a voltage drop calculator online; tools like Rapidtables can really help you figure out if your cable size is appropriate for your distances and current needs.
I get your concern about the current, but 16AWG should manage it fine for short distances. Just keep an eye on connections since any poor ones can get super hot.