AC200L - EMI - Electrosmog

Hello, I need your help:
the AC200L (+ B230) is located in a garden shed about 5 meters away from my amateur radio antenna. Even when the AC200L is simply turned on (i.e., no load is connected and it will not be charged), the AC200L generates strong EMI across almost the entire shortwave range of 2–30 MHz via the antenna into my amateur radio station. This effect is even stronger when the AC converter on the AC200L is activated—as I said, even without any power consumption.

My question is, how can I best shield the AC200L so that it doesn’t spread such strong EMI?

Thanks for any helpful tips,
Roland