I'm currently using a buck-boost converter (generic XL6009 buck-boost like this one) to power a router and fiber terminal from a 12V battery backup system. The reason for using the buck-boost converter is that the 12V battery backup system doesn't regulate the output, so the output can vary between 11V-13.8V depending on whether the battery is charging etc. and I'd rather err on the safe side than assume the equipment has regulators that are OK with that voltage range.
The problem is, the buck-boost converter's inductors and caps are getting very hot, while the driver is running much cooler at a slightly warm temp. In the image below, the circled parts are the ones getting very hot. I measured the current draw on the battery side while in use and it only ran at around 1A @ 12V output, which according the the converter's specs shouldn't be an issue. I've been running the converter as is for around 3 weeks now without any issues, but given that this is a battery backup system I'm worried that the increased heat will further decrease the converter's efficiency and I'm also worried that this could damage the converter prematurely in the long run. Is this normal for a buck-boost converter at these power levels or is the unit possibly defective/out of spec?