November 2, 20169 yr A 48 volt Li battery is rated at 6.5 Kwh and can be discharged to 80%DOD. This means that it has an effective maximum capacity of 5.2 Kwh or 108AH. It is also rated for 5000 cycles and costs R50K. 8* 200AH (12volt in a 48volt configuration) Gel batteries at 30%DOD gives an effective capacity of 120AH (equiv 5.76 Kwh). They are rated for 3000 cycles and cost R6k each for a total cost of R48K. The cost and capacity of each of these options is almost the same but the cycles for the Li battery are much much better. Is it a no brainer or have I missed something out?
November 2, 20169 yr 5.2 * 5000 > 5.76 * 3000. So it would seem to be a no-brainer. Lithium also charges faster and can do higher discharge rates. Lead recycles easier though. So the only reason to go for Gel might be that you have concerns about that :-) Don't take my opinion as gospel though, I might also be missing something.
November 2, 20169 yr I've been buying DC GEL batteries ( 12v200Ah ) for around R3.2k , and the ones im using are safe to discharge up to 75% of capacity. 400 cycles at 75%DoD .
November 2, 20169 yr 3 hours ago, CaTcH21 said: I've been buying DC GEL batteries ( 12v200Ah ) for around R3.2k , and the ones im using are safe to discharge up to 75% of capacity. 400 cycles at 75%DoD . Oooh 400 cycles is not where I would like to be at. >800 cycles is more inline with proper deep cycle batteries.
November 2, 20169 yr 21 minutes ago, Chris Hobson said: Oooh 400 cycles is not where I would like to be at. >800 cycles is more inline with proper deep cycle batteries. My minimum standard I want is 1600 cycles at 50% DOD - 4000 at 20% DOD. Any batt that can matches or betters that, and not cost me an arm and a leg, interests me.
November 3, 20169 yr 18 hours ago, Chris Hobson said: Oooh 400 cycles is not where I would like to be at. >800 cycles is more inline with proper deep cycle batteries. Show me one Lead Acid battery that can provide even 800 cycles at 75% DoD EDIT: Ok my info is a little inaccurate, see attached for a more accurate ref.
November 3, 20169 yr 28 minutes ago, CaTcH21 said: Show me one Lead Acid battery that can provide even 800 cycles at 75% DoD Trojan T105 RE
November 3, 20169 yr 1 minute ago, CaTcH21 said: How much does a 12v200Ah Trojan cost ? Around R2500 for one 6v 225Ah
November 3, 20169 yr 32 minutes ago, CaTcH21 said: Show me one Lead Acid battery that can provide even 800 cycles at 75% DoD Trojan T105 RE
November 3, 20169 yr 8 minutes ago, viper_za said: Around R2500 for one 6v 225Ah In that case a lithium battery would be the better choice since it costs around the same.
December 6, 20169 yr On 11/3/2016 at 2:26 PM, CaTcH21 said: In that case a lithium battery would be the better choice since it costs around the same. which Lithium?
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