Re: [RE-wrenches] Low voltage DC v. higher voltage DC

[jay]

HI Harry,

The battery is charged from the AC side correct?
And is the charging algorithm inside the ABU.

If so why couldn’t you use a generator to charge the battery?

jay

peltz power



> On Sep 13, 2018, at 7:10 AM, Harry Mahon  
> wrote:
> 
> Marco – 
>  
> The Sunny Boy Storage “Advanced Backup Unit” accessory or ABU will be 
> discussed at SPI in a couple weeks – first units are being stocked now at our 
> warehouses in US.  The ABU will allow the SBS to be a grid former in case of 
> utility outage, however there are no plans to have any generator 
> inputs/controls to allow for battery charging from generat
> And yes, BYD BBox HV 5.12/7.68/10.24 devices will be supported when available 
> in US (will be this year I understand)
>  
> Mike
>  
> -
>  
> The SMA Sunny Storage looks promising.
>  
> It will be able to work with the LGC RESU10 HV battery and, sooner rather
> than later I hope, BYD package as well.
>  
> And it will allow for a backup generator tie in.
>  
> Ta-dah!
>  
> marco
>  
> On Thursday, September 13, 2018, Bruce Erickson  >
> wrote:
>  
> > Hi Marco,
> > 
> > I partially agree with you. I recently bid Outback, StorEdge, and Pika
> > options for a GTBB customer, partly to understand pricing for myself, and
> > found OB to be so much more expensive. The customer really wanted a system
> > that would be to be able to charge the batteries off a generator in an
> > outage, understandably. But the extra thousands in cost for OB ended up
> > being prohibitive. Add-on rapid shutdown is a killer. So he’s opting for a
> > nice modern high voltage DC system, with optimizers and built-in RSD, but
> > when there’s an extended outage, he’ll have to hope the sun comes out right
> > after the storm to recharge the batteries, or he’ll end up in the dark
> > again, until the grid comes back. Maybe there’s a high voltage inverter
> > that allows generator charging, or a third-party battery charger, that I’m
> > not aware of. Otherwise high voltage systems are very limited for backup,
> > at least in winter storm scenarios.
> > 
> > *Bruce Erickson*
> > Mendocino Solar Service
> > PO Box 1252
> > Mendocino, CA 95460
> > 707-937-1701
> > 707-937-1741 fax
> > bruce at mendocinosolar.com 
> > 
> > 
> > *Connecting Mendocino County to Solar Since* *1994*
> > 
> > 
>  
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Re: [RE-wrenches] Low voltage DC v. higher voltage DC

[jay]

HI Drake,

Can you upload that http again?  The link doesn’t work.

thx
jay



> On Sep 15, 2018, at 7:39 AM, Drake  
> wrote:
> 
> Is this what you are referring to? 
> http://en.byd.com/energy/download/high-voltage/B-Box%20High%20Voltage%20Specification.p
>  
> 
> At 10:10 AM 9/13/2018, you wrote:
> 
>> And yes, BYD BBox HV 5.12/7.68/10.24 devices will be supported when 
>> available in US (will be this year I understand)
>> 
>> 
>> 
>> 
>> 
> 
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Re: [RE-wrenches] Reliable 48 to 24 V DC to DC reducer

[Ray]

SCI was that Canadian company.  Samlex does make a 48 v to 24 v 
converter modelIDC-100C-24.


However, I would consider skipping the El cid pumps and going to the new 
TACO or Grundfos ECM drive circulators.


Ray Walters
Remote Solar
303 505-8760

On 9/15/18 8:58 AM, Drake wrote:
Since Solar Converters seems to have evaporated, I'm not sure where to 
look for a 48 to 24 V DC to DC converter. Samplex has 24 to 12. It 
seems like someone mentioned a Canadian company that makes these.


I need to step down power from a 48 V battery bank to power El Sid 
pumps for an offgrid hydronic  heating system.


Thanks,

Drake

Drake Chamberlin
/Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
/http://athens-electric.com/



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Re: [RE-wrenches] Reliable 48 to 24 V DC to DC reducer

[Sindelar Solar]

While not as inexpensive as David's solution, I have used Mean Well 
converters with success. This manufacturer supplied the DC-DC step-down 
converters used by Wattsun for their tracker drives, so there's a pretty 
long history with them. Check out 
https://www.trcelectronics.com/View/Mean-Well/RSD-200C-48.shtml.


Allan

On 9/15/2018 9:31 AM, David Katz wrote:
I have had great luck using cheap LED drivers. They say 110-240 vac 
input but they rectify the input to DC. I have used them to run 12 and 
24 volt stuff off of 48 vdc and even 400 vdc. They operate down to 
about 35 volts dc. They are available in a variety of output voltage 
and current. And they are isolated.   And they only cost a few dollars.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F152134115704
David Katz

On Sat, Sep 15, 2018 at 7:58 AM Drake 
> wrote:


Since Solar Converters seems to have evaporated, I'm not sure
where to look for a 48 to 24 V DC to DC converter. Samlex has 24
to 12. It seems like someone mentioned a Canadian company that
makes these.

I need to step down power from a 48 V battery bank to power El Sid
pumps for an offgrid hydronic  heating system.

Thanks,

Drake

Drake Chamberlin
/Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
/http://athens-electric.com/

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--
David Katz Sent from Gmail Mobile

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--

*Allan Sindelar*
al...@sindelarsolar.com 
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*

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Re: [RE-wrenches] Reliable 48 to 24 V DC to DC reducer

[David Katz]

I have had great luck using cheap LED drivers.  They say 110-240 vac input
but they rectify the input to DC.  I have used them to run 12 and 24 volt
stuff off of 48 vdc and even 400 vdc. They operate down to about 35 volts
dc. They are available in a variety of output voltage and current. And they
are isolated.   And they only cost a few dollars.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F152134115704
David Katz

On Sat, Sep 15, 2018 at 7:58 AM Drake 
wrote:

> Since Solar Converters seems to have evaporated, I'm not sure where to
> look for a 48 to 24 V DC to DC converter. Samplex has 24 to 12. It seems
> like someone mentioned a Canadian company that makes these.
>
> I need to step down power from a 48 V battery bank to power El Sid pumps
> for an offgrid hydronic  heating system.
>
> Thanks,
>
> Drake
>
> Drake Chamberlin
>
>
>
>
>
> *Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified
> Solar PV 740-448-7328 *http://athens-electric.com/
>
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> --
David Katz Sent from Gmail Mobile
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Re: [RE-wrenches] Reliable 48 to 24 V DC to DC reducer

[Luke Christy]

Drake,
I’ve run into this problem numerous times in the last year, as I’ve had a 
number of off-grid customers that I have upgraded from legacy 12V or 24V 
systems to 48V. Left behind are often things like expensive DC fridges and DC 
heating pumps. I’ve searched for converters a number of places and have found 
that eBay (and Amazon) have a ton of DC-DC converters available. Yes they are 
Chinese, and the many different brands seem to be clones of one another, so 
It’s hard to pick one with confidence. I was suspicious of them at first, but 
have several out in the field that have worked well for some time now. Most are 
in the 10-20A output current range, but there are bunch of different voltage 
configurations available. Just do a search on eBay with your desired voltages 
and you’ll pull something up. For the 48-12V conversion range, the solution 
I’ve settled on is golf cart DC-DC converters, which tend to be high quality 
and are designed to run 12V lights and accessories from 48V golf cart battery 
banks. I find these on eBay as well and have had great luck with them.

-Luke


Luke Christy

NABCEP Certified PV Installation Professional™: 

Solar Gain Services, LLC
PO Box 531
Monte Vista, CO. 81144
sgsrenewab...@gmail.com 
719.588.3044
www.sgsrenewables.com 
> On Sep 15, 2018, at 8:58 AM, Drake  
> wrote:
> 
> Since Solar Converters seems to have evaporated, I'm not sure where to look 
> for a 48 to 24 V DC to DC converter. Samplex has 24 to 12. It seems like 
> someone mentioned a Canadian company that makes these. 
> 
> I need to step down power from a 48 V battery bank to power El Sid pumps for 
> an offgrid hydronic  heating system. 
> 
> Thanks,
> 
> Drake 
> 
>  <>Drake Chamberlin
> Athens Electric LLC
> OH License 44810
> CO License 3773
> NABCEP Certified Solar PV 
> 740-448-7328
> http://athens-electric.com/  
> 
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[RE-wrenches] Reliable 48 to 24 V DC to DC reducer

[Drake]

Since Solar Converters seems to have evaporated, I'm not sure where 
to look for a 48 to 24 V DC to DC converter. Samplex has 24 to 12. It 
seems like someone mentioned a Canadian company that makes these.


I need to step down power from a 48 V battery bank to power El Sid 
pumps for an offgrid hydronic  heating system.


Thanks,

Drake

Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
http://athens-electric.com/

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Re: [RE-wrenches] Low voltage DC v. higher voltage DC

[Drake]

Is this what you are referring to? 
http://en.byd.com/energy/download/high-voltage/B-Box%20High%20Voltage%20Specification.p 



At 10:10 AM 9/13/2018, you wrote:

And yes, BYD BBox HV 5.12/7.68/10.24 devices will be supported when 
available in US (will be this year I understand)








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