We have worked for many years with a rental shop called Rentaski - they have plenty of lockers and are located just at the bottom of the slopes (alongside the Font Negre chairlift to be exact). The price they charge is €4 per day and the lockers accommodate up to four sets of skis / boards (without boots, as it is always better to take your boots back with you to dry them out).
hi ,we are coming the 15th of jan and staying at hotel cal ruiz was wondering if u could recomend ski lockers we could use while we are there also we arrive on a sunday is it best to go that day and take our boards or the next thnks