Transformerless stacked active bridge (TSAB) direct current (DC)-to-DC power converters designed based on parent switched capacitor (SC) converter topologies. The TSAB DC-to-DC power converter includes the SC converter. The SC converter includes a plurality of switches and a plurality of capacitors. Each capacitor of the plurality of capacitors is electrically coupled to at least one of the plurality of switches. The plurality of capacitors includes tree capacitors, and link capacitors forming a loop with at least one of the tree capacitors. The TSAB DC-to-DC power converter includes at least one inductor electrically coupled in series to at least one of the link capacitors. The TSAB DC-to-DC power converters provide high efficiency bi-directional operation without requiring isolation transformers. The TSAB DC-to-DC power converters enable high power density in a wide variety of practical applications involving low, medium, or high power requirements, with comparably lower package sizes/weights and inductor component values.