Today's Message Index:
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1. 03:41 PM - Re: Regulator set point (Robert L. Nuckolls, III)
2. 04:08 PM - Re: Regulator set point (Jan de Jong)
Message 1
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| Subject: | Re: Regulator set point |
At 11:23 AM 3/21/2018, you wrote:
>
>I would like to mention: check any danger of high currents if a
>LiFePO4 battery (13.2V) is directly parallelled with a lead-acid
>battery (12.6V).
I just measured an SVLA resting voltage of 13.1 volts
while my EarthX is 13.4 volts. When connected together,
there WAS a circulating current on the order of 400mA.
In an operational scenario where both batteries are
floated on a 13.8 to 14.2 volts bus, I suspect
the circulating currents between the two will be
small in the event of alternator failure. If one
sets 2.8v per cell as minimum discharge voltage, this
translates to 11.2 volts which corresponds to a 90%
plus depletion of the SVLVA as well.
Bob . . .
Message 2
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| Subject: | Re: Regulator set point |
There might only be a concern then if an architecture allowed
parallelling after serious discharge of the lead-acid battery?
Jan de Jong
On 3/22/2018 11:40 PM, Robert L. Nuckolls, III wrote:
> At 11:23 AM 3/21/2018, you wrote:
>> <jan_de_jong@casema.nl>
>>
>> I would like to mention: check any danger of high currents if a
>> LiFePO4 battery (13.2V) is directly parallelled with a lead-acid
>> battery (12.6V).
>
> I just measured an SVLA resting voltage of 13.1 volts
> while my EarthX is 13.4 volts. When connected together,
> there WAS a circulating current on the order of 400mA.
>
> In an operational scenario where both batteries are
> floated on a 13.8 to 14.2 volts bus, I suspect
> the circulating currents between the two will be
> small in the event of alternator failure. If one
> sets 2.8v per cell as minimum discharge voltage, this
> translates to 11.2 volts which corresponds to a 90%
> plus depletion of the SVLVA as well.
>
> Bob . . .
>
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