Tesla Motors Club

Ok I "Won" the powerwall with the Tesla referral contest. I am not on the power company's time of Use program, but considering switching once I get the powerwall. Paying 11 cents kwh 24/7 now. If I switch I pay 6 cents off peak, 11 cents shoulder and 23 cents peak. I would obviously charge the Tesla in off peak and try to time shift as much as possible, and then use the powerwall as much as possible during peak time. Power bill last year was $2500. NO Solar panels here

On-peak pricing is in effect during the non-summer season months from 6:00 a.m. – 9:00 a.m. Monday through Friday. Shoulder-peak times include 9:00 a.m. - noon and 5:00 p.m. – 8 p.m., Monday through Friday. All other times are off-peak, including weekends and holidays.
On-peak pricing is in effect during the summer season months from 1:00 p.m. – 6:00 p.m. Monday – Friday. Shoulder-peak times include 11:00 a.m. - 1:00 p.m. and 6:00 p.m. – 8:00 p.m., Monday through Friday. All other times are off-peak, including weekends and holidays.

I know I need a converter which cost about $2k. What will I need to get the Powerwall to charge during off peak hours and discharge during peak hours?

If I could time shift and only use off peak, I would save about $1000 a year. I know I can't get there 100%, but guessing maybe 50% of that.

Thanks

Mark