Zip code
90266 is Manhattan Beach, CA.
Net metering is dead in CA, unless you put in a reservation no later than April 14th, 2023.
This means you get zilch for backfeed most of the time, and pay retail.
You want to:
1) Consume power while PV makes it.
2) If something cycles on and off, like an A/C, you probably want a battery to clip the peaks and valleys, leaving zero import, zero export.
Turnkey PV costs $0.10/kWh (amortized over 20 years), and DIY costs $0.025.
Batteries cost $0.05/kwh (over 6000 cycle, 16 year life.) Calendar life could be shorter if multiple cycles in a day.
It could make sense to put in PV able to supply peak A/C draw rather than only enough for average A/C draw + batteries.
But NEM 3.0 (Solar Billing Plan) rules may forbid you to install PV producing 2x average consumption. Maybe you can do it with zero or limited export.
Solar Billing Plan normally gives paltry credit for backfeed, like about $0.02/kWh (less than it costs you to produce.)
However, it gives credit varying between $3.00 and $4.00 per kWh for 2 hours per day in September. And $1.00 per kWh/day in August. This is early evening, 7 to 9 PM. It could be worthwhile to have batteries to charge during the day, backfeed during those couple hours. A kWh exported at $3.50 in September allows you to draw close to a kWh per day every other month of the year.
Once you buy a battery to earn that super-peak backfeed credit, it is available for peak/valley shaving the rest of the year, and for night time use. Those credits will be useful in winter (if that season exists in your location) and for cloudy days.
When you can make power for $0.025/kWh and store it for $0.05/kwh, I'm not sure it's true that saving a watt is cheaper. I'd be inclined to use cheap reliable resistance water heater and dryer, rather than newfangled heat pump technology.
Control of loads (enable heating and pumping loads to minimize import/export) I'd put as a higher priority.