Yes, you can
From WPSOLR 14.9, there is a new option on the WooCommerce pack to replace category pages queries with WPSOLR queries.
How does it work ?
WooCommerce categories pages are simply WP_Query with a filter on the category. WPSOLR replaces WP_Query with a Solr query, filtered with the category retrieved from the urls looking like “/product_category/slug-some-category”.
Can I add the WPSOLR facets widget on the category pages ?
Not only you can, but you should! The WPSOLR facets widget is intelligent enough to show only facets for the current category of products, and even hide the category top levels (showing only it’s category children).