Hey everyone! I'm looking to connect a 200W solar panel to my EcoFlow Delta3 Plus using an MC4 to XT60 connector. I'm wondering if I really need to go with 10 AWG cable, or if 12 AWG will do the job just fine. At what wattage should I typically switch to 10 AWG? Also, since the EcoFlow will be indoors in my garage and the panel will be outside, I'm planning on using a 40 amp fuse between the panel and the EcoFlow. Is that too high, or should I consider a 20 amp fuse instead? I also heard that Wago nuts are only suitable for 12 AWG, so if I need to use 10 AWG, I guess I'd have to use twist-on wire connectors instead?
2 Answers
Just FYI, there are Wago connectors available that can accommodate 10 AWG wires. If you’re looking at efficiency, using the right gauge for your run length will save you some trouble. If it’s a shorter distance, 12 AWG is perfectly fine!
When it comes to wire gauge, it’s not just about wattage; you need to consider the amperage too. For a 200W panel, you can run about 16.7 amps based on the formula 200W divided by 12V, which is a rough estimate for your setup. You want to make sure you follow NEC tables for safe wire gauges based on how much current you’re carrying. For charge purposes, a 12 AWG should generally be sufficient for your needs unless your run is really long, then 10 AWG can help reduce any voltage drop.
True, but remember that the panel voltage comes into play too. You might find your panel running closer to 20V, which would give you around 10 amps.