Robert Roth
1 min readDec 1, 2024

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Thanks for responding to my 2AM note with so many Typos…
Ok here is your 90 second update of “grid batteries:
Iron air offers grid storage at about half the cost of Li NMC, is in production but needs a. Bit of refinement.
There are several batteries in pilot production (flow batteries, other new chemistries like Alsym all pushing the price down.
Ok let’s talk about some applications emerging. There is a new stove that comes with a large battery. It uses 110, shifts the peak energy use from the grid to the battery. So use 110 not 220. Not a battery but similar effect is heat pumps used in washer dryer combos. Again uses 110.
Back to grid batteries and EVs. How do apartment households charge them? Did you know adding L2 for each apartment complex is very expensive for most as they were built years ago ago very expensive infrastructure improvement are needed. Ok add 350 kw high speed ports, about 23 will service 14,000 apartment households. Then offer 10 minute time slots to apartments to charge their EV once a week adding 250 miles. However the high speed charging ports need grid batteries to shift demand from peak times otherwise cost per kWh is to high. Not saying this is the solution for apartments charging EV but it is possible today.
Just some examples of grid batteries shifting demand in time and likely to emerge lowering costs to shift from fossil fuel with less money for grid infrastructure.

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Robert Roth
Robert Roth

Written by Robert Roth

Retired Intel Electrical Engineer, 70's US Navy Officer Nuclear Power Program, Graduate studies in Business UC Berkeley, BSEE U of Fla.

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