mohammedbera2 Posted December 14, 2016 Share Posted December 14, 2016 Hi guys dont find this onsite but wanted to know is it worth it to spend R100K for a 48v bank made of 12x2v@900ah Compared to R50k 48v bank made of 16x12v@230ah (920ah) Thanks Sent from my GT-I9500 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 15, 2016 Share Posted December 15, 2016 It all boils down to number of cycles. I would not invest too heavily in batteries. I am privy to something I cannot divulge so hopefully I can tell you in the New Year. mohammedbera2, Mark, superdiy and 2 others 5 Quote Link to comment Share on other sites More sharing options...
Johann1982 Posted December 15, 2016 Share Posted December 15, 2016 1 hour ago, Chris Hobson said: It all boils down to number of cycles. I would not invest too heavily in batteries. I am privy to something I cannot divulge so hopefully I can tell you in the New Year. Interesting... Hint? New tech or alternative to battery? Quote Link to comment Share on other sites More sharing options...
viper_za Posted December 15, 2016 Share Posted December 15, 2016 1 hour ago, Chris Hobson said: It all boils down to number of cycles. I would not invest too heavily in batteries. I am privy to something I cannot divulge so hopefully I can tell you in the New Year. Ja Chris, kom gee ons iets om oor te dink die vakansie mohammedbera2 1 Quote Link to comment Share on other sites More sharing options...
HeinTheTerrible Posted December 15, 2016 Share Posted December 15, 2016 There was a recent breakthrough with supercap batteries. Quote Link to comment Share on other sites More sharing options...
Johann1982 Posted December 15, 2016 Share Posted December 15, 2016 8 minutes ago, HeinTheTerrible said: There was a recent breakthrough with supercap batteries. Hmmm... Please go on.... Quote Link to comment Share on other sites More sharing options...
Johann1982 Posted December 15, 2016 Share Posted December 15, 2016 http://www.express.co.uk/news/science/740174/Battery-breakthrough-supercapacitor-technology-revolutionise-mobile-phones-electric-cars that's the one link I found Quote Link to comment Share on other sites More sharing options...
___ Posted December 15, 2016 Share Posted December 15, 2016 Price per kwh stored is all I care about. If the cycle life is similar, go with the 12V one seeing as it is cheaper :-) mohammedbera2 and Regie 2 Quote Link to comment Share on other sites More sharing options...
Johann1982 Posted December 15, 2016 Share Posted December 15, 2016 @plonksterThere's actually a guy in your area that sell those Narada 12v 200ah batteries for cheap. R1200 per batt when I last checked and they were basically a year old. Quote Link to comment Share on other sites More sharing options...
HeinTheTerrible Posted December 15, 2016 Share Posted December 15, 2016 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. Quote Link to comment Share on other sites More sharing options...
___ Posted December 15, 2016 Share Posted December 15, 2016 1 minute ago, Johann1982 said: @plonksterThere's actually a guy in your area that sell those Narada 12v 200ah batteries for cheap. R1200 per batt when I last checked and they were basically a year old. 1. They are not stolen Vodacom batteries? 2. PM me his details! :-) Quote Link to comment Share on other sites More sharing options...
Johann1982 Posted December 15, 2016 Share Posted December 15, 2016 Hahahaha.. no he has papers for them. I also thought they were stolen at first. HeinTheTerrible 1 Quote Link to comment Share on other sites More sharing options...
SilverNodashi Posted December 15, 2016 Share Posted December 15, 2016 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 Quote Link to comment Share on other sites More sharing options...
HeinTheTerrible Posted December 15, 2016 Share Posted December 15, 2016 15 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 Just wait and see... Quote Link to comment Share on other sites More sharing options...
Johann1982 Posted December 15, 2016 Share Posted December 15, 2016 Speak to @Chris Hobson I am sure he knows how to run lithium batteries off an Axpert. Quote Link to comment Share on other sites More sharing options...
HeinTheTerrible Posted December 15, 2016 Share Posted December 15, 2016 10 minutes ago, Johann1982 said: Speak to @Chris Hobson I am sure he knows how to run lithium batteries off an Axpert. You can run lithium batteries on almost any charger/inverter, you just need to change the charger settings. Quote Link to comment Share on other sites More sharing options...
___ Posted December 15, 2016 Share Posted December 15, 2016 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 :-) Quote Link to comment Share on other sites More sharing options...
SilverNodashi Posted December 15, 2016 Share Posted December 15, 2016 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 Quote Link to comment Share on other sites More sharing options...
___ Posted December 15, 2016 Share Posted December 15, 2016 25 minutes ago, SilverNodashi said: Freedomwon I know them... The bms-bridge code on github... that was specially for them Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 15, 2016 Share Posted December 15, 2016 12 hours ago, Johann1982 said: Interesting... Hint? New tech or alternative to battery? New tech which will do away with the need for battery storage. Generate power as you need it. Mark 1 Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 15, 2016 Share Posted December 15, 2016 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. Quote Link to comment Share on other sites More sharing options...
Mark Posted December 15, 2016 Share Posted December 15, 2016 47 minutes ago, Chris Hobson said: New tech which will do away with the need for battery storage. Generate power as you need it. Advanced donkey boiler driving steam turbine and genny... guessing here... Quote Link to comment Share on other sites More sharing options...
Groenkaroo Posted December 15, 2016 Share Posted December 15, 2016 1 hour ago, Chris Hobson said: New tech which will do away with the need for battery storage. Generate power as you need it. 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. mohammedbera2 and HeinTheTerrible 2 Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 16, 2016 Share Posted December 16, 2016 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. mohammedbera2 and ibiza 2 Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted December 16, 2016 Share Posted December 16, 2016 9 hours ago, Mark said: Advanced donkey boiler driving steam turbine and genny... guessing here... You obviously are up to speed with my "boer-maak-'n-plan". Mark and mohammedbera2 2 Quote Link to comment Share on other sites More sharing options...
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