Switching utilities Owner occupied duplex

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Hello Bigger Pockets! I finally have closed on a duplex! Hence making me new to the Landlord Game! Boy has it been a ride.. 

Question regarding SWITCHING UTILITIES: 

-Duplex is not sub metered, One meter for home. (Plan to sub ASAP.)

-Seller did state that they split utilities (pay to tenant on one side.) (she’s Awesome!) I did do my screening before approving her thanks to BP.

called Local Power company and they said that it’s currently billed to a tenants name.. Does that mean I have to switch everything over to my name still or shall i WAIT to speak to my tenant and see if it’s okay to keep it in her name?  Would you guys say its best to just keep everything into her name? & I can just pay her as I live on side and rehab? 

Thanks Guys!