It is expensive, almost $100 per kWh stored, plus construction costs that involve fireproofing and spacing things because lithium batteries are flammable. And a lithium battery loses capacity with every recharge, so it needs replacement every few years.
We need batteries that cost, say, $10 / kWh, are not (as) flammable, not toxic (not Pb, not NiCd), and don't degrade too fast.
With that, they can be large, heavy, have low specific charge, require high or low temperatures (within reason), etc. For a large utility-grade installation all these qualities are not hugely important. There is plenty of space under solar panels and around wind turbines anyway.
Before that, selling methane remains a very good business indeed.
We need batteries that cost, say, $10 / kWh, are not (as) flammable, not toxic (not Pb, not NiCd), and don't degrade too fast.
With that, they can be large, heavy, have low specific charge, require high or low temperatures (within reason), etc. For a large utility-grade installation all these qualities are not hugely important. There is plenty of space under solar panels and around wind turbines anyway.
Before that, selling methane remains a very good business indeed.