[oil pan 4]

No battery will last as long as solar panels.
Solar panels should be doing at least 80% of rated at 25 years, a lot of people to include my self believe panels could last around 50 years.
The absolute max life on lithium batteries is around 20 years. That means if they still work they are likley holding between 10% to 40% of original capacity.

I believe I said trackers at least double the price.

Batteries doubling the price is just the starting point.
I would probably take my panel name plate capacity in kw and install at least 3x to 7x the 20 amp hour rate in kwh worth of batteries.
With lithium you want at least around double.
The problem with lead acid is its easily charge them too fast so you have to match the battery size to the panel output.

The world can't even produce enough lithium ion batteries to make even 5% of the cars sold full electric. Right now there is no solution to producing cars and grid scale lithium batteries.
Lead acid are just too inefficient for grid scale. The charging losses would be tremendous.

The problem with solar is people like to only look at grid scale utility installed name plate prices per watt.
That means they only look at installed capacity versus price.
They don't look at total production versus price, they try to stay away from that one.

We already had some one try to float that bs that on here where solar power is cheapest. I told them to give me one example of some place that uses a lot of solar power and has cheaper electrical rates than places that use dirty power . No surprise they could not provide an answer.
To be fair I only earned an associates in applied science for power plant ops plus wind and solar power generation. So anyone who wants to talk power generation is at a severe disadvantage.