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 Martin Your Own Question

Martin , Engineer
Category: General
Satisfied Customers: 4756
Experience:  i'm 41 and i never stopped studying and experimenting
Type Your Question Here...
Martin is online now
A new question is answered every 9 seconds

Hi, I just purchased a 120 watt foldable solar panel. It

Resolved Question:

Hi, I just purchased a 120 watt foldable solar panel. It has an attached controller with a cable. The cable ends are alligator clips. How could I attach this to my Xantrex 1500 powerpack battery that just has both AC and DC outlet plugs? Thank You for your help, [email protected]
Submitted: 5 years ago.
Category: General
Expert:  Martin replied 5 years ago.
Hello, welcome to Just Answer. You can charge it with the DC plug. You need to respect the polarity and must have a regulator never going over 12V DC . You should have a car DC plug coming with the unit that you can use (The polarity for 12 V DC sockets is center pin positive (+), outer collar negative (-).

Here is what the manual of the Xantrex say:

"Recharging with a Solar Panel

A 12-volt solar panel rated to produce a maximum of 12 amps can be used to charge XPower 1500 via the DC Power Socket. Once the solar panel’s DC plug is inserted into the DC Power Socket and the solar panel is placed in the sun, XPower 1500 will charge automatically just as with the AC Charger. With direct sunlight, a typical 3 Amp solar panel will charge XPower 1500 in about 24 hours. If the solar panel does not have a regulated output, disconnect it immediately after XPower 1500 is charged.

CAUTION: Risk of damage to battery pack A solar panel with an unregulated output left connected after charging is complete, or one with an output that exceeds 15 volts DC, can damage the battery

Customer: replied 5 years ago.
Hi, Maybe I did not explain too well. What I want to know is how or what kind of a connector I can use to connect my solar panel cables which has alligator cables at the ends (the cables that look like a plier that when you squeeze opens up, the ones used to charge car batteries, one being red, one black that get connected to electrodes on top of the battery). My Xantrex 1500 does not have electrodes, but rather a DC outlet ( which resembles a cigarette lighter charger in a car) and a regular AC outlet which looks like a regular household outlet. How is it at all possible to connect the two, the solar cable to the battery?
I can't fit the very large solar connector, which as I explained looks like old car battery chargers into the battery outlets. Thank You for your help, With Best Regards, LPRaggi.
Expert:  Martin replied 5 years ago.
Like i mentioned, indeed the Xantrex use car cigarette lighter. You might be able to directly connect to the cable provided with the Xantrex or you can buy one and strip it and make a connector at the other end from 2 bolt (alligator clip hold well on them). You can screw them in a little piece of wood or plastic. The alligator clamp are probably black and red. Red is + and black is -. Just use it on the polarity i mentioned in my previous post. If you don't mind about the flexibility of the alligator clamp, you could cut them and solder this directly to a cigarette lighter cable (it would be more secure against short circuit from accidental de-clamping)

Edited by green-owl on 12/18/2010 at 11:30 PM EST
Martin, Engineer
Category: General
Satisfied Customers: 4756
Experience: i'm 41 and i never stopped studying and experimenting
Martin and 53 other General 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... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...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:

  • 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
< Previous | Next >
  • 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
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

Meet The Experts:

  • Dr. Y.

    Dr. Y.


    Satisfied Customers:

    I am fellowship trained specializing in general urology and reconstructive urology.
< Last | Next >
  • Dr. Y.'s Avatar

    Dr. Y.


    Satisfied Customers:

    I am fellowship trained specializing in general urology and reconstructive urology.
  • John's Avatar


    Home Appliance Technician

    Satisfied Customers:

    Appliance repair business owner for over 43 years.
  • Tina's Avatar



    Satisfied Customers:

    JD, BBA Over 25 years legal and business experience.
  • GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    GMC Mechanic

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
  • dermdoc19's Avatar



    Satisfied Customers:

    30 years practice in general and cosmetic dermatology
  • Dr. Gary's Avatar

    Dr. Gary

    Cat Veterinarian

    Satisfied Customers:

    DVM, Emergency Veterinarian, BS (Physiology)
  • Dr. Pat's Avatar

    Dr. Pat

    Bird Veterinarian

    Satisfied Customers:

    25+ years working primarily or exclusively with birds