At what point does ZBM deliver a better technical outcome?After...

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Treed

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08/02/21

11:04

Post #: 50788307
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Originally posted by Docweemo: ↑

what I’m trying to get my head around is whether the economics turn in RFX’s favour after 4-6 hr, or whether it’s actually 4-6 weeks. ZBM has a lower round trip efficiency by about 10%, and lower power, so for frequent charge/discharge cycles, lithium is better. At what point does ZBM deliver a better technical outcome? It seems to me that if lithium loses 5% in 24h from full, and then much smaller after that, it must be a few weeks before ZBM makes up for its lower RTE. A lower technical return means that you need a much lower price to make a business case - there’s a step change in the price you can charge if ZBM a technical advantage in the 4h-24h timeframe, but not in the 4week timeframe.

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At what point does ZBM deliver a better technical outcome?

After a while the RTE for lithium begins to drop below a ZBM because the cell charging capacity of lithium batteries degrades over time, based around cycling frequency. I know the SA battery has replacements factored into the price for that reason.

The Lithium Battery Test Centre does create temperature fluctuations so their results will not reflect air conditioned storage. That said in their trials it seems a ZBM will become rather more efficient some time before about 3000 cycles if the RTE is maintained as planned. For slower rates of discharge the ZBM would become superior.

From https://batterytestcentre.com.au/wp-content/uploads/BatteryTestingReport9Sept2020.pdf

Last edited by Treed: 08/02/21

RFX Price at posting: 4.4¢ Sentiment: Hold Disclosure: Held
4 Upvote

0 Great analysis

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