June 22, 201610 yr Has anyone done or is there a link to a cost analysis of batteries available in South Africa based on a Rand/kWh/cycle basis as per this example I found on a European website? Watt it all comes down to.
June 22, 201610 yr Here is something I came up with just now. https://docs.google.com/spreadsheets/d/1jZ3hbwL2CUQBtpkPto-6Srh5Y4eEYLpAmlSLDGcR5A4/edit?usp=sharing
June 28, 201610 yr The biggest problem with this is twofold: 1) Prices are generally tied to Rand/Dollar exchange and price on demand so it fluctuates a lot. And most suppliers have different levels of markup. Ideally this should be done with dealer pricing, or a set margin of say 10% to get an accurate table of costs.
June 28, 201610 yr Author Going to go with 2 x 8 x T105RE's. Most cost effective and cycled to 25% DoD should give me 10 years and hopefully by then new technology has killed the price of storage. Other option is 8 x T105RE's and just to kill them in 4 years or so and hope the lithium's have plunged by then. Sent from my SM-G920F using Tapatalk
June 28, 201610 yr FWIW. T105RE's are at the most, today, R2600 each. What size ? Sent from my SM-G920F using Tapatalk
June 28, 201610 yr Author @Manie. To use 1 bank of 48v and cycle hard and hope that there is a cost effective 20 year new generation battery in 3 or 4 years when they are tired or 2 x 48v strings that could ne good for 10 years or more is the decision to be made. Sent from my SM-G920F using Tapatalk
June 28, 201610 yr 9 minutes ago, Gerald_db said: ... cost effective 20 year new generation battery in 3 or 4 years ... My gut feel says 10-20 years, measuring against me saying same 5 years back.
June 28, 201610 yr My gut feel says 10-20 years, measuring against me saying same 5 years back. I also simply do not see this happening. The "man" has too many vested interests in this not happening. [emoji85] [emoji86] [emoji87] Sent from my SM-N900 using Tapatalk
June 28, 201610 yr @Manie. To use 1 bank of 48v and cycle hard and hope that there is a cost effective 20 year new generation battery in 3 or 4 years when they are tired or 2 x 48v strings that could ne good for 10 years or more is the decision to be made. Sent from my SM-G920F using Tapatalk Hi Gerald did you have a look at the lead crystals. I know it is expensive but you can get alot more cycles out of the batteries and its very save. You can cycle it alot deeper that other batteries. I see at pv out that extra pannels makes a huge difference. Well done. What type/makes batteries do you have? Sent from my SM-G920F using Tapatalk
June 29, 201610 yr @Gerald_db lead crystals 20% dod = 6528 cycles and on 40% dod = 3672 cycles Sent from my SM-G920F using Tapatalk
June 29, 201610 yr On that Google sheet I posted there's a cnj 200 which is lead crystal. They make sense if you can get them below 7k a piece. Sent from my GT-I9195 using Tapatalk
June 29, 201610 yr I can get 12v 200ah lead crystals at around R6200excl ex Cape Town Awesome price . Deltec? Sent from my SM-G920F using Tapatalk
June 29, 201610 yr 13 hours ago, Manie said: Deltec Careful. Cycle life on the Deltec is much lower than on the Betta Battery. Consult with the spec sheets. I may be wrong, but the last time I checked the Deltecs were somewhat disappointing, hardly doing much better than our benchmark Trojan :-)
June 29, 201610 yr If i looked at at the specs. Seems Deltec is the better one Sent from my SM-G920F using Tapatalk
June 30, 201610 yr "Deltec" Energy Solutions is one of the suppliers of Lead Crystal batteries in Cape Town.
June 30, 201610 yr 9 hours ago, Manie said: Seems Deltec is the better one What numbers are you seeing? It's quite likely that I have the wrong end of the stick, this is just what I remember. I saw the price and cheered up, then I saw the cycle life and lost all that cheer. Let me see if I can find it again. <insert Saxopohone music here> Here we go... http://www.battery-pmp.co.za/Deltec-Lead-Crystal-Batteries.pdf Page 5, second chart on the left. Around 1600 cycles to 50%. Same as Trojan T105RE. <Insert more Kenny G here> http://www.solarsolved.co.za/datasheets/batteries/Deltec/Lead_Crystal_6_CNFJ_200.pdf Page 2, second chart down on the right. Around 3200 cycles to 50%. That's double. If there is another spec sheet I should see, please send it to me. The above two are the reason I dismissed the Deltec as a possible option.
June 30, 201610 yr So basically, if you can get me 3000 cycles at less than 7k, the math is as follows: 12*200*0.5*3000 = 3600 kwh over lifetime 7000/3600 = Less than R2 a kwh (without even doing the math)... If it can only do half that cycle life, then price is over R3 per kwh and lead acid wins. :-)
June 30, 201610 yr Deltec is an official distributor of Lead Crystal batteries in South Africa. Instead of having a Betta Batteries label, they are re-branded to display Deltec's logo as they are an official supplier. Deltec's data sheet is however incorrect if I am not mistaken (they have been notified). Rather get your data sheets from the Lead Crystal website. You will also see Deltec's details under the Africa distribution link. http://leadcrystalbatteries.com/distribution/distributors-in-africa/
June 30, 201610 yr That is awesome news. It changes the picture completely. Thanks for the info! Sent from my GT-I9195 using Tapatalk
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