Mobile machine electrification faces challenges as efficiency, cost, reliability, and performance lead to an increased focus on an integrated thermal management system (ITMS) and heat load reductions. Benefits such as waste heat recycling is considered a key feature of ITMSs but requires better understanding of thermal load distributions. This paper provides a thermal load analysis of a battery powered excavator-loader—often referred to as backhoe loader—during excavating and transportation in cold and hot ambient conditions. The analysis is based on measurements and data from an existing series-hybrid electric version. The results show that the working hydraulic system is the highest potential thermal load contributor corresponding to 71–75% of the total thermal load during excavating. The potential cooling demand reduction in cold ambient conditions by recycling waste heat during transportation is 38% compared to 10% during excavating.