on a bright sunny day I get 19V and only .25a...not .5 amps as the mfr states. is this what you get?...its not performing to specs.
1579667
Never tested the current on mine but it will fully charge a half empty RV battery in about 2 days so I know it is working.
1579668
The specs are under highly controlled conditions rather than real world conditions. However, on a sunny day, with the panel aimed at the sun, and with a MPP controller, you should get something close to the rated power (maybe 80 percent of rated power or something like that). What might be happening to you is that your battery may be fully charged or nearly so. So the charge controller is limiting the current to 0.25A to avoid over-charging the battery. You could disconnect the panel from the charge controller (so the panel is not connected to anything) and check the short-circuit current and open-circuit Voltage. If those are ballpark OK, no real cause for concern. The specs are under highly controlled conditions rather than real world conditions. However, on a sunny day, with the panel aimed at the sun, and with a MPP controller, you should get something close to the rated power (maybe 80 percent of rated power or something like that). What might be happening to you is that your battery may be fully charged or nearly so. So the charge controller is limiting the current to 0.25A to avoid over-charging the battery. You could disconnect the panel from the charge controller (so the panel is not connected to anything) and check the short-circuit current... » Read More The specs are under highly controlled conditions rather than real world conditions. However, on a sunny day, with the panel aimed at the sun, and with a MPP controller, you should get something close to the rated power (maybe 80 percent of rated power or something like that). What might be happening to you is that your battery may be fully charged or nearly so. So the charge controller is limiting the current to 0.25A to avoid over-charging the battery. You could disconnect the panel from the charge controller (so the panel is not connected to anything) and check the short-circuit current and open-circuit Voltage. If those are ballpark OK, no real cause for concern. « Show Less
1129540
How many amps of electricity the panel will produce depends on the amount of sunshine falling on the panel. With this panel on a bright sunny day I was getting between 2.3 and 3.0 amps with a multimeter. For me it has been a great panel for camping.
1157879
Regardless of what vehicle it's in or if it's running packs in parallel or series I've always stopped at 3.6v/cell when the pack is at rest. You could possibly go lower and still be safe, however I noticed that my packs lasted a lot longer stopping at 3.6v/cell. Also I found these alarms to be rather quiet. Just a heads up. Enjoy &#128522;
185473
My battery voltage is consistently about 13.75 volts. I retrofitted a desk lamp with one of these bulbs, it's on for at least six hours/day and i've had it for about two months. Maybe just be mindful of the "very hot" warning, and don't use it in a tightly enclosed fixture for an extended time.
1943708
Seconding what everyone has said, keep in mind that the rating for the momentary is as stated: "Works at 12 Volts 10 Amp, 24 Volts 5 Amp, and 110 Volts AC 5 Amp." Now, I'm not car guru, but I did take electronics courses, but make sure that your ignition circuits do not exceed those ratings!
1502904
The mfr spec is 400 watts RMS x 1 channel. That is probably at 13.8V power input. If you want to operate continuously near full power you should use 6 or 8 AWG wire to power the amp. There is thermal protection in the amp, so do not expect 400 watts if mounted in the trunk of a black car on a hot sunny day.
1003374
Very low. I believe it was less than 1.0 amp. Like 0.6 when I did the math but on the safe side it was 1.6 at the very most. My memory is failing me at the moment but im pretty sure it was less than 1.0 amp. Hope this helps
1021138
My guess would be it's either defective or you have too much load on it. I believe it is rated for 18amps (6amps x 3 channels).
9941
I measured the output of mine plugged in to my motorcycle connection. 12.97 volts going in from the battery, output 5.1 volts so the spec from the Battery Tender website is incorrect.
1670302
1 1/2 years on our bike and it still works. The voltage is lower than I expected or wanted at 12.8 volts at highway speed. It drops to 11.6 at an idle and I find that to be to low. But I have had stock alts and I've had a Compu-Fire that lasted 18 months and the armature was bad so it couldn't be repaired. I am actively looking for a better solution. We love the bike, but the electrical system is lacking.
859567
As far as cold weather performance, I'm now disappointed. I tested it today with both the car and the just-charged powerall cold, at -15°C (5F). It doesn't work. But there could be something wrong with mine and maybe it's not fully charged. While charging, it stayed at the 3-led level for 4 hrs. So I dis/reconnected charger, and suddenly it goes to 5 leds and stops. Something's weird.
789576
Hello! My numbers are the same for output voltage. It reads: 5.0 V = 2.0 A. It's a great product!
532397
I have had 5 amps on a really good day but of course it depends on sun light. If you hook two in parallel then you increase amps and sun light surface. I have two of the 100 watt panels on my system now and can get 8 -9 amps on a good day.
1633344
I hooked it up as 12volts. It should be even brighter at 24volts, however that will shorten its lifespan. If you have a 24volt system, you can install an inline resistor. Then it will only use 12 volts. My two lights are brighter than 4 high beams. I hope this helps.
2228315
I've been running one for about a year now, no problems except I was using the load output to control some outside lighting (on at dusk, off at dawn) and it seemed to get confused and was turning the lights on and off randomly. I disconnected it and let it sit for a day and then reconnected it and it has been working correctly since. I am running a 100 WATT 12V panel into it, are you staying within the maximum input power and voltage levels (12v/260W or 24v/520W) specified?
75509
I just tried 2 18350s witch were both about 4v so that would bump it up to 8v. It came on then dimmed out. Prolly has circut protect and won't allow above a certain volt or amp. Not sure witch but I would have to say it probably won't run on CR123a.
1385397
lets say your battery is at 11v and a high sunlight charge from the panel pushes in 13~14v, the read on the battery will show a "soft" 12v. the shade comes in and the battery goes back to 11v. Next time you see it, be amazed to see how many amps your controller cranked up.