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Can you explain the salt water batteries ?
On Jul 11, 2018 2:45 AM, "'HD Zeddies' [email protected] [EVGRAY]" <
[email protected]> wrote:
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> Hi George,
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> some weeks ago I visited the fair in munich and have seen some interesting
> battery solutions:
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> - Salt water battery – uses only salty water, which isn’t dangerous.
> Deep cycle discharge up to 100% is possible. Livecycle minimum 15 years
> with 80% power.
> - Crystal battery – unfortunately a special charging electronic is
> necessary
> - Redox flow – actually in size of a refrigerator with 6 kwh storage.
>
> My favorite is the salt water battery, because it is easy in installation.
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> As I wrote weeks ago in this forum I am working on independency solutions
> with a friend and some engineers. My personal conclusion is:
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> The costs for energy storage in Germany is actually between 650 € and 1000
> € per kwh. Even if you calculate a livecycle of 15 years and an average use
> of 60% your costs per kwh is in the same range as from the common
> suppliers. And your 24 Kw PV Generator will produce much more energy as a
> normal house would use – but not to the right time. With a total off-grid
> installation you cannot sell the energy that cannot be used in the moment
> and batteries are charged.
>
> I don’t know your special situation weather about energy usage in your
> house (heating with electricity) nor about your energy production. The
> following proposal is only if your situation is normal ( consumption of
> 5000 kwh / year, Sunshine-hours around 1000 per year, warm water and
> heating with solar water panels and in additional electric heating combined
> with oil or gas.
>
> I would think about a storage to get an independence of maybe 1-2 days but
> actually with grid connection. You can get some cash with selling energy
> and this can be invested in better storage technology. This could bring an
> independency of more something around 90% over the year.
>
> But maybe in your case it can be different.
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> HD
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> *Von:* [email protected] <[email protected]>
> *Gesendet:* Donnerstag, 5. Juli 2018 02:06
> *An:* george gray [email protected] [EVGRAY] <
> [email protected]>
> *Betreff:* Re: [EVGRAY] Modifying an SMA Tripower 15kw grid tied inverter
> to stand alone
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> Good on you George, keep us posted on your progress, here is a link for a
> search on Vanadium redox batteries, they were invented in Au. the Howard
> Gov. failed to promote them but they are still around.
>
> cheers
>
> Eduardo
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> On Wednesday, 4 July 2018, 10:02:01 pm AEST, george gray
> [email protected] [EVGRAY] <[email protected]> wrote:
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> Eduardo,
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> Thanks for the advice mate. I have 2 of these 15 kw 3 phase inverters in
> parallel and I'm looking to get off the grid altogether. I don't want to
> switch back to the grid. I have 24 kws of solar panels, 96 panels in all
> and I have a couple of generators and I want to get a battery bank etc.
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>
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> George
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> On Tuesday, 3 July 2018, 7:01:18 pm AEST, Eduardo Codina
> [email protected] [EVGRAY] <[email protected]> wrote:
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> I think that grid tie inverters use the grid to chop up the DC so that the
> frequency is synchronized and doesn't clash with the grid, so to stand
> alone they would require added circuits to create the alternating
> frequency, may be it would be easier to use a stand alone inverter for off
> grid use and switch to the grid tie one when you want to export surplus to
> the grid.
>
> cheers
>
> Eduardo
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>
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> On Tuesday, 3 July 2018, 5:18:11 pm AEST, george gray
> [email protected] [EVGRAY] <[email protected]> wrote:
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> Anyone got any experience of modifying SMA Tripower 15kw grid tied
> inverters to stand alone off the grid?
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> Thanks in advance for any advice.
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> George
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