[RE-wrenches] Additional Battery Charger

[Darryl Thayer]

Use caution here the battery cycles depends upon DOD and recharge rate.  I have found that recharge rates over C/10 shorten battery life.  And if you measure the recharge voltage absorb volts, you can not push even that hard except when the battery is low.  Further charge voltage gets to high the charge efficiency get lower.  
 
As to generators any SI (spark ignition) engine (also called a premix engine) will have lower efficiency at lower loads, the CI (compression Ignition) engine is more tolerant of part load keeping its efficiency high at part load.  
 
Darryl

--- On Thu, 6/17/10, bob <reellison at gmail.com> wrote:


From: bob <reellison at gmail.com>
Subject: Re: [RE-wrenches] Additional Battery Charger
To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
Date: Thursday, June 17, 2010, 8:19 PM








Look into the Magnum inverters as 2nd chargers, very good chargers with generators.
 
I have done this many times, in the case of failure of the other inverters for some reason, run wires and be back up and running.
I think the 4448 inverter is 60 amps @ 48 volts with an input of 16 or so amps AC.
 
Later,
Bob 
 


From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of benn kilburn
Sent: Thursday, June 17, 2010 7:22 PM
To: Wrenches
Subject: [RE-wrenches] Additional Battery Charger
 
G'day Wrenches,

 

 I'm looking for an additional charger(s) to increase the charging capacity from the back-up 12 kW Onan generator into the 1200 Ah battery.  Right now the generator's full potential output is limited by the charging capacity of the two VFX3648's which have a max charge output of 45A each.

 

The idea here is to use the generator to its full charging capacity when it is running, taking in to consideration that the generator will feed any AC loads before charging the battery. 

 

Iota and IBE chargers have been suggested.  Any comments on these or other makes?

 

Do all generator types (diesel, propane, LNG, gasoline) run more efficiently when fully loaded?  or is this only the case with diesel (so i've heard)?

 

thanks,

benn
DayStar Renewable Energy Inc. 


benn at daystarsolar.ca

780-906-7807 

HAVE A SUNNY DAY 

 

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