There is an issue with the EPEX Spot Web Scraper integration. See https://github.com/mampfes/ha_epex_spot/issues/231. I use it to get the prices for the 'BE' region.
Since this wonderful Huawei Solar Hems solution relies heavily on the Epex Spot prices, and I'm not such a code expert: would there be anyone capable of creating support for alternative 'price' sources. For the region I'm interested (BE), we can use Nord Pool, Entso-e or even GE-Spot integration. These integrations seem to be delivering not quite the same sensors / attributes from what I see. But perhaps I'm wrong..