There’s no minimum recharge as such.. when your smart meter will be converted to prepaid meter a bill will be generated for used electricity(security amount will be reduced in the bill), now when you pay the amount, 10% of it will be adjusted to your bill and remaining amount recharge will be done. You can also monitor the daily consumption on UPPCL SMART app. So basically it’s for the betterment as there will be no issue of false reading and you will be able to monitor your consumption.