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2v vs 12v price is it worth it or not


mohammedbera2
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3 hours ago, HeinTheTerrible said:

Or just go with a Telsa Powerwall 2. Rand per kWh and 10-year warranty will beat almost any 2v/12v battery bank with the same (usable) capacity.

but you can't use the Tesla Powerwall 2 with an Axpert, Victron or Infinisolar inverter, and that's where the whole setup gets very expensive 

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20 minutes ago, SilverNodashi said:

but you can't use the Tesla Powerwall 2 with an Axpert, Victron or Infinisolar inverter, and that's where the whole setup gets very expensive 

I think the problem probably has to do with how it is packaged. I believe the current solutions (with Solar Edge and SMA) uses a high-voltage setup, so it integrates directly with these inverters that require a high input voltage.

But in the end it's just a lithium battery and there should be no reason why you cannot package it to make a 48V bank. Well, that is not exactly true either, we all know there are challenges in using parallel strings, so a straight reconfiguration is probably not ... well... straight forward.

But then, Tesla aren't the only people who make Lithium batteries either (Just like Apple aren't the only people who make smart phones... duuuh). Victron makes these Eco-multi things... if you really want to go that way :-)

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Just now, plonkster said:

I think the problem probably has to do with how it is packaged. I believe the current solutions (with Solar Edge and SMA) uses a high-voltage setup, so it integrates directly with these inverters that require a high input voltage.

But in the end it's just a lithium battery and there should be no reason why you cannot package it to make a 48V bank. Well, that is not exactly true either, we all know there are challenges in using parallel strings, so a straight reconfiguration is probably not ... well... straight forward.

But then, Tesla aren't the only people who make Lithium batteries either (Just like Apple aren't the only people who make smart phones... duuuh). Victron makes these Eco-multi things... if you really want to go that way :-)

Yup. The interface PCB will only with Solar Edge and SMA. At least, in South Africa. You might be able to make it work with other inverters but would void the warranty. That's if you can get a local distributor who will sell you the battery alone. Alternaive options include the Freedomwon and BlueNova

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7 hours ago, Johann1982 said:

Speak to @Chris Hobson I am sure he knows how to run lithium batteries off an Axpert.

Sjoe I am being given credit far beyond my knowledge base. The Aussie Axpert lads almost all run on Lithium. The have a separate BMS to prevent over-charging. If I was running Lithium batteries I definitely would be using Coulomb's patched firmware. 

7 hours ago, HeinTheTerrible said:

 You can run lithium batteries on almost any charger/inverter, you just need to change the charger settings.

Essentially Lithium does not need a complicated charge algorithm charge to set voltage which is also float voltage.

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7 hours ago, Groenkaroo said:

 

Hi Chris, I think I am going to come and spy on your farm to see how you store your enengy these days. You've got me all curios now.

No need! Not even I have it yet. As soon as I can I will announce it from the rooftops. Every person on this forum is a potential user, as is every farmer whom Eskom has by the short and curlies. My one fear is demand will outstrip supply for several years. I suppose the market will quickly solve that with several manufacturers coming on board to meet demand.

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