TOU-D-A is about the best plan out there. Only 0.03 per day charge, you get the baseline credit and you have low super off peak and high on peak rates.You need to be very careful to switch out of the grandfather rate. You maybe saving like $15 to $20 a month on basic charges, but it is possible that you could go into the negative at the end of the year. Currently you are selling kwh back at a much higher rate with the grandfathered plan. So if you are charging at night at the lowest rate, you are selling 2x/3x the majority of the usage rate as charging takes a big chunk. You are selling high and buying low.
You said you were like -$73 on your first month? My monthly bill is usually -$100 to $-200 a month. My yearly bill for the last 3 years were around -$1700 to -$2000. Currently the SCE rate compare tool is not working for my account (not sure why), when I did it back in 2019, it shows that if I were to switch from my grandfathered TOU-D-A plan to one of the newer ones, I would be paying about $900 to $1000 more per year.
Your July bill shows that you sold 403 kWh but used 471 kWh. So if your selling rate is the same as your usage rate which is around $0.27/kWh, you will be in the negative even if you completely not use any electricity between 4pm and 9pm which has a even higher usage rate of $0.43 and you are not going to be generating anything between 4pm and 9pm.
Could you share your bill details? I am interested in your Daily Basic Charge, Minimum Daily Charge, NBCs Charges, Baseline Credit and whether or not any of them come out of your energy credits or if they are billed to you monthly.
Going to call SCE to see if I can cancel leaving my grandfathered plan, does not go into affect until end of this month so hoping to can cancel the change