LiPo4 v Gel choice?

[shumbaman]

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?

[___]

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.

[CaTcH21]

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 .

[Chris Hobson]

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.

[Guest]

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.

[CaTcH21]

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.

[viper_za]

28 minutes ago, CaTcH21 said:

Show me one Lead Acid battery that can provide even 800 cycles at 75% DoD

Trojan T105 RE

[CaTcH21]

Just now, viper_za said:

Trojan T105 RE
 

How much does a 12v200Ah Trojan cost ?

[viper_za]

1 minute ago, CaTcH21 said:

How much does a 12v200Ah Trojan cost ?

Around R2500 for one 6v 225Ah

[wtjaden]

32 minutes ago, CaTcH21 said:

Show me one Lead Acid battery that can provide even 800 cycles at 75% DoD

Trojan T105 RE

 

 

[wtjaden]

There is a 200AH 12volt   Trojan J200-RE  but ive not seen it locally yet 

[CaTcH21]

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.

 

[SilverNodashi]

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?