[solardev]

My countertop water heater power cord does the same thing. It's kinda annoying, because just moving the boiler around the counter will often cause it to come loose: https://shop.zojirushi.com/products/8-cdp-p300

That goes from the wall outlet directly into one of the boilers like this: https://shop.zojirushi.com/collections/water-boilers-warmers