I lost the manual. It says 11+ voltage, but the 24 hours maximum for charging the unit. Should I charge it to 13+??
1157324
this one is not to be charged more than an hour after use .. do not leave it in to be charged it will burn out .... the first charge is to be 24 hours after that only 1 hour after use (if needed) or charge about 1 hour per month .... the next model up with the blue case you can leave charging as it has an automatic cut off when charged this model does not ... I have had the jnc 4000 for 3 years and it works perfectly ..
637339
Sorry it took me so long to answer the question. I had planned to measure the charging wattage but have been too busy. There is nothing on the battery that states the current required for charging. So I'll estimate that it would be 10 to 20 watts maximum. Insignificant.
1809050
It will not work with 24 volts. I don't recommend this unit to anyone as mine stopped working after 6 months and I had to replace the unit! I am not a happy camper with Amazon!!!
1865536
I don't have any problems with mine when the solar charge controller is on, and it peaks at 28.5v. Same with my 24v backup charger (which puts out 27+ volts). It should be fine.
2077047
It depends largely. There are instructions in the box on how to care for the battery, but...basically it has to be charged to aat least 12.6 volts. It would not hurt to charge it fully, that's what I did even though mine read 12.8. As for chargers, use a charger capable of charging an agm battery. I charged mine at 15 amps bit over read lower is better. Not sure, but mine is going strong as has for The 3 months I've owned it
1164907
Did you make sure everything was plugged in well. Sometimes putting the cord onto the power source is a little hard and if it was on all the way then I would say something is wrong because within the 24 hours mine was fully charged.
682100
It really depends on how old the charger (actually the battery inside) is. I got mine 2 years ago, and it would no longer hold anything higher than 11 volts even after being plugged in for 3 days. So I went ahead and bought a replacement battery from Ebay (~$27), and now keeps it charged every 30 days. I leave mine in the vehicle, so I can use it when I need it the most.
528253
I left mine plugged in for 24 hours then disconnected it and used it. There was plenty of charge left and I won't plug it in again for a recharge until it slows down.
2082895
The 13.7 volts you're reading is normal. The charge controller is doing its job. It's protecting your battery bank because 16-18 volts being pumped into batteries is not safe or recommended.
483058
How old is the battery? Is it trying to turn over? 12 hours should be enough to charge up the battery.
1445286
LorraineI am sorry I do not have an official answer as I am not a "PEAK" person, although fairly close to being one. When you had the unit plugged in to charge did you notice the charge light lit? Other than that, please contact the technical support organization.Hope you get fully charged soon.Richard
1593217
did you leave it unplugged for a full 24 hours to let it charge by the sun? Mine still works over a year later and this is how I set it up.
58293
I would say no. This unit has a hard time working with 48v for some reason. I have been very dissatisfied with mine. It should say 36v or 24v as that is all I have ever been able to get it to charge properly on. It will only charge 48v for a few minutes before shutting down.
506905
Connie,It sounds like the voltage on the battery is too low to charge. Has this battery every worked in this system before and is your charger plugged in and working ? Make sure you check the outlet that the charge is plugged into to confirm that it's getting the 110v it needs to charge the battery. Here is a good article to help you with your problem - best of luck to you. http://www.batterystuff.com/kb/articles/battery-articles/troubleshooting-a-battery.htmlRegards,Ken
1855359
I leave mine on the charger 24 X 7. Charging prior to a necessary use would, I think, not be a viable option. Just plug it in and forget it. It will be ready when you need it.
1171267
I got a similar unit recently and when I plugged it in, it too showed 100% charged. However, I unplugged the charger and checked the battery voltage which instantly dropped to under 6V. So that told me that the battery wasn't accepting a charge and the "100%" reading was coming from the charger just while plugged in. So I left it plugged in and after an hour it did start accepting a charge and the reading dropped to 60% or such. So it does take at least 12 hours, after that if it starts displaying 100% it probably is charged.
1261571
You should not have to charge it that long.There must be a proablem with it.2 hrs worked with mine.Try another plug otherwise send it back