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To put the previous post into perspective, roughly 1100 MWh of large scale solar output lost in SA today and about a tenth as much went into battery charging.
So scaling up the "big" batteries, all of them collectively, ten fold would have sorted it for today but not everyday so they need to be bigger than that.
Then there's wind curtailment and I haven't even tried to work that out other than to say it's significant and there was some today also.
Market's there right now if someone wants to get into it. Trouble is, there's no fortune to be made in doing so indeed simply breaking even over the full 15 year lifecycle with batteries is far from certain.
The battery I've got at home wasn't installed to make a profit and it's unlikely to do so. Call it a privately funded experiment if you like, I wanted a battery so I bought a battery, but energy arbitrage alone won't repay the cost even at a 0% rate of return and it's much the same for large scale installations. Any profit comes about by ancillary services, backup power, avoiding network costs, assigning some significant value to the public relations side of it as a marketing exercise and so on not from the actual energy being stored.
Nothing stopping anyone having a go at it though if they've got the money and no pressing need to get a return on it so can take a risk that it may or may not work out financially.
So scaling up the "big" batteries, all of them collectively, ten fold would have sorted it for today but not everyday so they need to be bigger than that.
Then there's wind curtailment and I haven't even tried to work that out other than to say it's significant and there was some today also.
Market's there right now if someone wants to get into it. Trouble is, there's no fortune to be made in doing so indeed simply breaking even over the full 15 year lifecycle with batteries is far from certain.
The battery I've got at home wasn't installed to make a profit and it's unlikely to do so. Call it a privately funded experiment if you like, I wanted a battery so I bought a battery, but energy arbitrage alone won't repay the cost even at a 0% rate of return and it's much the same for large scale installations. Any profit comes about by ancillary services, backup power, avoiding network costs, assigning some significant value to the public relations side of it as a marketing exercise and so on not from the actual energy being stored.
Nothing stopping anyone having a go at it though if they've got the money and no pressing need to get a return on it so can take a risk that it may or may not work out financially.