“How low can ya go?” 

> On Sep 7, 2021, at 16:44, Chuck McCown via AF <af@af.afmug.com> wrote:
> 
> Most rectifiers for “float “ service have current limiting.  And yes the 
> batteries will present a heavy load and it will take some time for the 
> voltage to come up.  If the lvd reconnects the batts the voltage could drop 
> so much they will disconnect again and flop for a while.  You need a 
> rectifier that can pull the live load plus a heavy charging current.  I would 
> go twice my load or more for this reason.  BTW not a fan of lvd.  Do you 
> really want to totally kill your customers in the unlikely event the bats go 
> that low?  I quit using them 20 years ago and have never regretted that 
> decision.
> 
> Sent from my iPhone
> 
>> On Sep 7, 2021, at 4:29 PM, TJ Trout <t...@voltbb.com> wrote:
>> 
>> 
>> What happens when you parallel your supply, load and batteries without using 
>> a 'dc ups' which provides lvd + charge current limit?
>> 
>> I'm using batteries with a Integrated lvd so I am just concerned with the 
>> behavior after a long outage where the load and battery will be fighting for 
>> the supply current?
>> 
>> Can't find any low cost options @ 48v to limit charge current (DC ups) Maybe 
>> I can use a diode one way and a current limiting device the other way to the 
>> battery?
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