Inexpensive voltmeter - Page 6 - Fiberglass RV


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Old 12-16-2012, 05:45 PM   #71
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vetustior humo!
Not yet but I'm working on it.
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Old 12-16-2012, 05:53 PM   #72
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Any recs for a solar battery maintainer? I have the impression that cheap junk predominates here as elsewhere so I'm willing to dig deep to swing something over $2.50.

jack
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Old 12-16-2012, 06:24 PM   #73
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A few notes
Trying to charge 2 dissimilar batterys in parallel usually results in neither getting a decent charge. As the voltage will usually rise more quickly in one battery, it will start shutting down the charger before the lower battery is charged. Been there-done that...

The local auto supply store has a mini-jumper set intended to connect one accessory socket to another vehicles for purposes of an emergency jump. You hook it up and let it cook for about 30 minutes with the good vehicle running.

I bought three DELCO versions on a clearance site for $5 each about a year ago. My daughter-in-law used hers to get a friends car started and it worked just fine. Much safer than jumper cables for the non-mechanical...

BTW: It has a current limiter built in to prevent blowing any fuses. Just running a wire and two male connectors is sure to blow the usual 10-15 amp fuse, I've also done that trying to charge a battery from the accessory socket.
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Old 12-16-2012, 06:59 PM   #74
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Any recs for a solar battery maintainer? I have the impression that cheap junk predominates here as elsewhere so I'm willing to dig deep to swing something over $2.50.

jack
I have no recommendation for you. Our friend Tom posted this site for Black Friday sales. I think the prices are still in effect. Raz

Solar Cell, Solar Panel, Renewable Energy, Wind Energy, Charge Controller, Solar Trackers

p.s. Remember, he started this thread.
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Old 12-16-2012, 09:33 PM   #75
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I have no recommendation for you. Our friend Tom posted this site for Black Friday sales. I think the prices are still in effect. Raz

Solar Cell, Solar Panel, Renewable Energy, Wind Energy, Charge Controller, Solar Trackers

p.s. Remember, he started this thread.

Other possibilities here: Amazon.com: solar car charger: Automotive

The Harbor Freight model gets good ratings when you get a good one.

1.5 Watt Solar Battery Charger
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Old 12-16-2012, 11:02 PM   #76
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I've been thinking about switching the connectors on my 80W solar panel hookup and extension cord from Anderson to 2 conductor flat connectors that the dogs can't unplug every whip stitch. While at it, I'll add pigtail with flat two to the batt terminals and have an actual charger rather than <2 amp output maintainer. See how I make out on the Xmas pilgrimage and whether the alternator can get this battery up to 12 1/2V. I may also get a solar maintainer. Thanks for the help with the spitballed converter lashup also.

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Old 12-17-2012, 08:51 AM   #77
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Six pages and 76 posts later, after pointing out a cheap voltmeter......what a long, strange trip it's been.
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Old 12-17-2012, 11:30 AM   #78
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Don't try it with a prize from Cracker Jacks. We could worry that bone a looong time!

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Old 12-20-2012, 11:25 AM   #79
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Fellas, that was entirely entertaining and educational. thank you.
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Old 12-20-2012, 11:47 AM   #80
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Any recs for a solar battery maintainer? I have the impression that cheap junk predominates here as elsewhere so I'm willing to dig deep to swing something over $2.50.

jack
What's a solar battery, let alone a solar battery maintainer?
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Old 12-20-2012, 11:52 AM   #81
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A few notes
Trying to charge 2 dissimilar batterys in parallel usually results in neither getting a decent charge. As the voltage will usually rise more quickly in one battery, it will start shutting down the charger before the lower battery is charged. Been there-done that...

The local auto supply store has a mini-jumper set intended to connect one accessory socket to another vehicles for purposes of an emergency jump. You hook it up and let it cook for about 30 minutes with the good vehicle running.

I bought three DELCO versions on a clearance site for $5 each about a year ago. My daughter-in-law used hers to get a friends car started and it worked just fine. Much safer than jumper cables for the non-mechanical...

BTW: It has a current limiter built in to prevent blowing any fuses. Just running a wire and two male connectors is sure to blow the usual 10-15 amp fuse, I've also done that trying to charge a battery from the accessory socket.

I don't believe that's true. When charging in parallel they both charge to the same voltage level. One cannot be of a higher voltage than the other. The charging current will be different, yes. I can't see anyway one will be undercharged while the other is fully charged.
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Old 12-20-2012, 11:57 AM   #82
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Six pages and 76 posts later, after pointing out a cheap voltmeter......what a long, strange trip it's been.
This thread has a life of its own.
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Old 12-20-2012, 12:32 PM   #83
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A solar battery maintainer (or tender) is a battery maintainer (or tender) POWERED BY a small solar panel. The charging voltage is under 2amps as is the case with grid-powered maintainers or tenders. I have no experience with solar-powered charge-maintaining devices. This is not an endorsement of any device, real or imaginary, made mention of by other than myself, to include but not limited to solar battery.

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Old 12-20-2012, 12:43 PM   #84
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A solar battery maintainer (or tender) is a battery maintainer (or tender) POWERED BY a small solar panel. The charging voltage is under 2V as is the case with grid-powered maintainers or tenders. I have no experience with solar-powered charge-maintaining devices. This is not an endorsement of any device, real or imaginary, made mention of by other than myself, to include but not limited to solar battery.

jack

You mean charging amperage under 2 amps, me thinks.
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