How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Eng. Andres Your Own Question

Eng. Andres
Eng. Andres, Engineer
Category: Consumer Electronics
Satisfied Customers: 1453
Experience:  Electronic Eng. Electronics Specialist. Circuit designer
Type Your Consumer Electronics Question Here...
Eng. Andres is online now
A new question is answered every 9 seconds

I have a 110v power supply in my cabin from a solar

Resolved Question:

I have a 110v power supply in my wilderness cabin from a solar system, at some times I run off a honda generator that runs true sine. I am installing a Sony Marine Amplifier XM604M and Sony Receiver CDXM60UI due to weather/environment conditions. What do I need to transform 110v power down to Marine equipment range with appropriate amperage for this system? I had been looking at something like a Pyramid PS15KX but don't know what amperage level is required for the two units combined, or do you have another recommendation? Please be as specific as possible as I am not an electronics person. Any information on what specifically I need in wiring materials to connect up the power would be helpful too. I am starting froma regular 110v household plug and need to end up in the sony marine audio equipment. Thank You! Andrew
Submitted: 1 year ago.
Category: Consumer Electronics
Expert:  Eng. Andres replied 1 year ago.
hi, thanks for using JA:

I will be as precise as I can, but if you need more information, just let me know.

Ok, the Sony XM604M has this power requirements :

12 V DC marine battery (negative ground)

With at least, 33 A.

The Sony receiver CDXM60UI has this power requirements:

Current Drain : 3 - 5 amps

Input Voltage : 12 V DC car battery (negative ground)

So you will neew a Power supply that converts 110V into 12VDC, and that can provide at least 38 Amps.

I would need to know if your actual installation can run such a high current and the price range that you will pay for the power supply.


Regards!

Customer: replied 1 year ago.
Sorry for delay in these questions my internet went down for a while. The amplifier draws a lot of power, Is this just at peak usage or is this whenever it is turned on? I am just wanting to know for power drain and circuit box wiringm, Would I need a 38 amp circuit at the junction box? I think most of these circuits are 15 or 20, how can it be that much? If I were in a house I would not have a special circuit for my stereo...

So I see simple devices for converting 110 ac power to 12v DC like adapters and then boxes like the pyramid unit. what distinguishes these? is it this amps issue
Expert:  Eng. Andres replied 1 year ago.
hi Andrew,

The values provided are the max current draw from the device. This means that, in the case of the amplifier, if you turn the volume to the maximum possible value, the amplifier will consume 33 A. The consumption is more or less lineal with the sound output power, the higher the volume the higher the current consumption.

You can use a power supply with less than 38 Amps, it will work for low volume levels. However, if you turn the volume to the max, accidentally, the power supply will be burnt, and possible the amplifier too. So it's better to have a high current power supply. That way, you can be sure that the PSU won't burn out. There isn't so much difference in price actually, so I think you will be limited by the 110V max current.

For your second question, can you tell me the exact PSU that you are looking to?

Thank you!
Customer: replied 1 year ago.

The PSU was Pyramids along the lines of what you see on this page http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=Pyramid+PS15KX+&hasWorkingJavascript=1


 


but these are huge devices. Would it be smarter for me to have a marine battery in the middle that I continually charge instead of these monsters. Wouldn't a marine battery have to be able to supply adequate amps?


 


Will I need a bigger circuit breaker at junction box too?

Customer: replied 1 year ago.

you also asked about the power system. the solar system is to spec of following


http://www.wholesalesolar.com/solarpowersystems/small-ac-home-off-grid-solar-power-system.html


with the 800amhour battery farm


generator is 3000w truesine from Honda

Expert:  Eng. Andres replied 1 year ago.
hi Andrew,

Thank you for your reply,

Once moment while I perform the calculations!
Expert:  Eng. Andres replied 1 year ago.
hi,

OK, for the PSU, well there are different types of piramid Pyramid PS15KX, depending into the max current supported. I have selected one for you, that will fit exactly your needs:

http://www.amazon.com/PYRAMID-PS52KX-50-AMP-SUPPLY-BUILT-IN/dp/B000GA9500/ref=sr_1_10?ie=UTF8&qid=1342610152&sr=8-10&keywords=Pyramid+PS15KX

This PSU outputs in 12 V, 40 Amps constant. Which is more or less the current you would need-as max current. This is the safest option. You can buy a lower current PSU, but please, be etremly careful with the power consumption of the amplifier.

For the solar system, well, it's difficult to tell if it can power the whole system of not. I would say that yes, but I would need the exact model number of the battery. Lead acid batteries can output a lot of current, so almost 90% sure that the solar system can drive the amplifier plus receiver setup. But to be 100% sure, I would need the exact model number of battery that you have in the solar installation.

Thank you!
Eng. Andres, Engineer
Satisfied Customers: 1453
Experience: Electronic Eng. Electronics Specialist. Circuit designer
Eng. Andres and 3 other Consumer Electronics Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
< Last | Next >
  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
  • I love this site! $9 instead of a repairman or new/used frig can't be beaten. This older woman will worry less now that she knows about this site. Bless you all. Windy USA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
 
 
 

Meet The Experts:

 
 
 
  • John

    Engineer and electronic enthusiast for more than 12 years.

    Satisfied Customers:

    163
    I am here to help you!
< Last | Next >
  • http://ww2.justanswer.com/uploads/CO/ComputEngineer/2012-2-6_20858_20111114201751jalogoold.200x200.64x64.jpg John's Avatar

    John

    Engineer and electronic enthusiast for more than 12 years.

    Satisfied Customers:

    163
    I am here to help you!
  • http://ww2.justanswer.com/uploads/ST/Steve555/2013-6-14_144343_Depositphotos4247517S.64x64.jpg Steve G.'s Avatar

    Steve G.

    Engineer

    Satisfied Customers:

    2244
    VP of electronic repair company. Audio nut since 1974. Home Theater advisor. Vinyl holdout!
  • http://ww2.justanswer.com/uploads/benimur/2009-03-29_003401_id_2.jpg Louie's Avatar

    Louie

    Technician

    Satisfied Customers:

    3715
    25+ yrs. experience in the field and 3+ yrs. online, down to component level.
  • http://ww2.justanswer.com/uploads/OR/OriginalSeadog/2011-7-22_191917_ProfilePicture.64x64.jpg Rod's Avatar

    Rod

    Systems Engineer

    Satisfied Customers:

    1317
    FCC Commercial Licenses, BSCS, ASEET, 40+years Electronics & Communication Systems
  • http://ww2.justanswer.com/uploads/SI/SiliconSavant/2012-6-27_192716_201264172651profile.64x64.jpg.64x64.png Daniel's Avatar

    Daniel

    Electrical Engineer

    Satisfied Customers:

    1177
    BSEE (Electrical Engineer), 10+ years electronic design experience ,chip, board, component expert
  • http://ww2.justanswer.com/uploads/LI/littlerusty2005/2012-1-11_574_rusty2.64x64.jpg Rusty's Avatar

    Rusty

    Customer Service

    Satisfied Customers:

    1167
    Over 20 years electronics experience. How may I help you today?
  • http://ww2.justanswer.com/uploads/greenowl/2008-12-31_012617_martinphoto.jpg Martin's Avatar

    Martin

    Engineer

    Satisfied Customers:

    1113
    16 years, include works in aluminium plant, industrial machinery, military weapons, programming