A similar situation to me then. The speed really picks up when going downhill, especially on a heavier bike like an ebike! I’ve done 45 mph on my recumbent without any effort. At least I was keeping up with the cars!

I have one more recommendation then: stress test your brakes! I’ve burned up a few sets of pads, even bluing out a set of rotors. Breaking power drops as the rotor temperature gets higher (“fade”) and I’ve nearly lost all my brake power before. You know, like at the end of a hill where there’s a busy intersection controlled only by stop signs. Fun.

Make sure you can stop with plenty of brake power left at the bottom of your hills. If you find it lacking, then consider harder pads and the associated rotors that can handle the pads. Mountain bike pads, semi for full metallic, are a good place to look. Careful with the extra hard pads (full metal/ceramic) because they must be matched with a rotor that can handle such a hard compound.