Bayan kusan shekaru 10 na ci gaba, sabbin motocin lantarki masu amfani da makamashi sun samar da wasu ma'auni na fasaha. Zane-zane na sassan abin hawa na lantarki da kayan aikin yana da ilimi mai yawa, daga cikinsu akwai zane naprecharge resistora cikin da'irar kafin caji yana buƙatar la'akari da yanayi da yawa da yanayin aiki. Zaɓin precharge resistor yana ƙayyade saurin lokacin kafin cajin abin hawa, girman sararin da ke cikin precharge resistor, babban ƙarfin ƙarfin abin hawa, aminci da kwanciyar hankali.
Precharge resistorresistor ne da sannu a hankali yake caja capacitor a farkon matakin da motar ke da karfin wutar lantarki, idan babu pre-charge resistor, cajin na yanzu zai yi girma da yawa don karya capacitor. Ƙarfin wutar lantarki da aka ƙara kai tsaye zuwa capacitor, daidai da gajeriyar kewayawa na gaggawa, wuce gona da iri zai lalata kayan aikin lantarki mai ƙarfi. Saboda haka, lokacin zayyana da'ira, ya kamata a yi la'akari da precharge resistor don tabbatar da amincin da'irar.
Akwai wurare biyu a cikin babban ƙarfin lantarki na abin hawan lantarki indaprecharge resistorana amfani da shi, wato na'ura mai sarrafa motoci da ake kira precharge circuit da na'ura mai karfin wutan lantarki kafin caji. Mai kula da motar (inverter circuit) yana da babban capacitor, wanda ke buƙatar caji kafin caji don sarrafa capacitor cajin halin yanzu. Na'urorin haɗi masu ƙarfin lantarki gabaɗaya kuma suna da DCDC (DC Converter), OBC (caja a kan jirgi), PDU (akwatin rarraba wutar lantarki mai ƙarfi), famfo mai, famfo ruwa, AC (compressor mai sanyaya iska) da sauran sassa, za a kasance. babban capacitance a cikin sassan, don haka suna buƙatar cajin su.
