Charging voltage for EFB batteries

[webcraft]

I have two new 100ah Yuasa EFB batteries. I have been charging them with a smart charger set to a standard lead acid profile, which charges at 14.7A

I have read that this may be too high for EFB batteries, and that I should use an AGM charging profile - which my smart charger has.

Should I switch to the AGM charging profile?

— W

 

[greeny]

Seem to remember 14.4 v is optimum for efb. Im sure one of the experts will be along soon.

 

[wingcommander]

Any particular reason you choose efb batteries over agm ?

 

[webcraft]

Any particular reason you choose efb batteries over agm ?

Much cheaper

 

[PaulRainbow]

I have two new 100ah Yuasa EFB batteries. I have been charging them with a smart charger set to a standard lead acid profile, which charges at 14.7A

I have read that this may be too high for EFB batteries, and that I should use an AGM charging profile - which my smart charger has.

Should I switch to the AGM charging profile?

— W

14.7V is on the high side, should be 14.4V

There's no information on the Amazon page for the charger you bought, so who knows what it's doing. Apparently, it desulphates the battery every cycle, not keen on that idea, if true.

 

[webcraft]

14.7V is on the high side, should be 14.4V

There's no information on the Amazon page for the charger you bought, so who knows what it's doing. Apparently, it desulphates the battery every cycle, not keen on that idea, if true.

I will select the AGM setting and see if that charges at a lower voltage.

Heres what it says about modes


Here's a link to the manual.

User name: bluemoment
password: blown@way13

https://bluemoment.com/manuals/Nespeak 215 charger.pdf

 

[webcraft]

 

[PaulRainbow]

I will select the AGM setting and see if that charges at a lower voltage.

Heres what it says about modes


Here's a link to the manual.

User name: bluemoment
password: blown@way13

https://bluemoment.com/manuals/Nespeak 215 charger.pdf

The manual doesn't give enough information. What's the float voltage, for instance.

The Std voltage of 14.7V (according to your earlier post) is too high for any of the batteries given as examples.

The AGM setting is too high for AGM and LifePO4 and pretty much every other battery listed in the Std examples.

This charger will shorten the life of most batteries, i would get something decent ASAP.

 

[webcraft]

The manual doesn't give enough information. What's the float voltage, for instance.

The Std voltage of 14.7V (according to your earlier post) is too high for any of the batteries given as examples.

The AGM setting is too high for AGM and LifePO4 and pretty much every other battery listed in the Std examples.

This charger will shorten the life of most batteries, i would get something decent ASAP.

Will fire it up on the AGM setting later and see what the actual voltage is on that setting.

 

[webcraft]

Will fire it up on the AGM setting later and see what the actual voltage is on that setting.

OK, it's running now on the AGM/LiFePo setting and voltage is between 14.4 and 14.5, so maybe very slightly high but should be OK.

I don't intend to run the charger in float, it won't be left on unattended, it is only to put some juice in when we have shorepower but no wind/sun.

UPDATE
as the battery approaches fully charged (charging current down to 6A) the voltage is between 14.5V and 14.6V