[RE-wrenches] Programmable Battery Charger

[Larry]

I must have missed the prior discussion about using PV CC. The concept 
sounds good but how many of you have done this and are there any 
pitfalls to be aware of? If I use a 20 amp bridge I should be able to 
produce 80 amps @ 14.4V. For continuous operation, will I need a large 
heat sink on it?

How does the unfiltered full wave peak voltage affect the CC over time? 
Are they (specifically Midnite) really designed to handle input waveform 
like this? I like this idea, especially if I can stack the controllers.

Thank you,

Larry

On 12/15/14 6:51 PM, jay peltz wrote:
> Hi Kirk,
>
> If you use a 200vdc midnight CC you'll have no issues.
> When you rectify 120vac its up around 166vdc
> ( uses the peak vac which is around 170vac.)
>
> For a 150vdc max controller ( midnite 150)  or a 144vdc ( outback FM) 
> then a buck transformer or standard transformer is the trick to reduce 
> the AC and hence the DC for these lower voltage units.
>
> jay
> peltz power
> On Dec 15, 2014, at 5:38 PM, Kirk Herander wrote:
>
>> This has been discussed on this list in years past. It is possible to 
>> use an outback charge controller as a battery charger. You need to 
>> put the 120 AC into a bridge rectifier, then feed the 120 DC into the 
>> controller’s PV input. So you’ll have an 80 amp battery charger.
>> *Kirk Herander*
>> *VT Solar, LLC*
>> */Proven PV provider since 1991/*
>> *www.vermontsolarnow.com*
>> dba Vermont Solar Engineering
>> NABCEP^TMInaugural Certificant
>> VT RE Incentive Program Partner
>> 802.863.1202
>> *From:*RE-wrenches 
>> [mailto:re-wrenches-bounces at lists.re-wrenches.org]*On Behalf Of*Dan 
>> Tittmann
>> *Sent:*Monday, December 15, 2014 8:18 PM
>> *To:*info at windsine.org <mailto:info at windsine.org>; RE-wrenches
>> *Subject:*Re: [RE-wrenches] Programmable Battery Charger
>> You can manually adjust Iotas with tweaking the potentiomiters while 
>> monitoring it with a god volt meter. But no time adjustment.
>> Daniel
>>
>> Daniel Tittmann
>> CTO
>> Greenwired
>> www.greenwired.com <http://www.greenwired.com>
>> daniel at greenwired.com <mailto:daniel at greenwired.com>
>> 707-923-2001 (office)
>> 707-206-5088 (Cell)
>> On Mon, Dec 15, 2014 at 4:21 PM, Windsine Inc. <windsine at gmail.com 
>> <mailto:windsine at gmail.com>> wrote:
>>
>> Check out Argus Technologies.
>>
>> RoyR
>>
>> On Dec 15, 2014 4:01 PM, "Larry" <larry at starlightsolar.com 
>> <mailto:larry at starlightsolar.com>> wrote:
>>
>> Wrenches,
>>
>> Does anyone know of a 120/12 volt battery charger that can be 
>> programmed for absorb and float voltage and time in absorb mode? I 
>> have been needing this product for many years but I can only find it 
>> in inverters with built in chargers from Magnum, Outback, and Xantrex.
>>
>> --
>> Thank you,
>>
>> Larry Crutcher
>> Starlight Solar Power Systems
>>

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