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Post by Danilich on Jul 28, 2016 9:16:06 GMT -8
Hi every one, i have a marina baterry that i use for fishing. This year i took it for a camping. When I start to use the baterry it had a 12volts. I hooked up small cooler with a 12v load. From 12v to 9v it got in 30hrs. So i hooked up my 200w next day and it seems to be charging from 6am to 7pm. I went to sleep at 11:30pm and it showed me on sollar charging kit green light. I woke up at 5am and baterry completely dead. What cuz to die my baterry? Any ideas? I use renogy 200w starting kit off grid mwp. Please help
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Post by Admin on Jul 28, 2016 13:20:08 GMT -8
Hi Danilich,
I request you contact one of our tech support representatives so they can discuss it more with you. Our number is 1-800-330-8678, business hours are M-F from 8-5 and Saturday 9-2 PST.
Best regards,
Renogy
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Post by jsb2000 on Jul 29, 2016 8:26:08 GMT -8
I hooked up small cooler with a 12v load. From 12v to 9v it got in 30hrs. Yikes. If I read that correctly, you drained the battery from 12V to 9V? If so, you likely killed your battery...that's why it wouldn't take or hold a charge. The minimum voltage you should ever drain a flooded 12V battery to is 10.8 volts...and you should try to avoid that at all costs! The typical cut off on most controllers is 11.6V. In fact, you should try to avoid taking a deep cycle battery below 50% capacity...which is around 12.1V. |
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Post by johann on Nov 6, 2016 15:10:36 GMT -8
A marine battery is usually not a true deep cycle battery and not the best choice for an solar application.
It is a hybrid battery between a starter/car battery and a true deep cycle battery, but will never be a true deep cycle battery and will never be as good as a true deep cycle battery. Problem #1
That 'small ' cooler load is not a small load in that sense. It is about a 100 watt load and will kill/discharge that battery in no time considering that the 200 watt panel put about 160 watts max per hour back into the battery if you do not put a load on that battery. If the load is 100 watts and the solar panel puts out 160 watts then you only put 60 watts per hour back into the battery for about 5 hours average a day but you pull more energy out for the rest of the day and night. problem #2
Note here: A solar panel will give the most power at solar noon. In the morning and afternoon/evening the power output of the panel is very low. Most regions give you about 5 hours average of usable sun exposing, except Arizona and some regions around it.
A 9 volt battery voltage is a super super dead battery and most likely will never come back to live. 10.5 volt volts is considered a dead battery. If you want to prolong the live of a battery then don't take it down pass 11.5 volts. Problem #3
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