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Post by chachi78 on Dec 5, 2019 21:35:36 GMT
So this is my setup. My issue is the 200ah battery doesn't seem to charge all the way, and/or looks as if it does, per controller, but then is depleted in less than 12 hours. All of my specs are in the picture attached to the post. The battery is just over a year old, and has only had a load on it within the last 6-8 months of this year ![]() . The biggest load are LED 2W candle lights at night. I'm still learning all the ins and outs of the system, so maybe I am missing something?  |
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Post by tattoo on Dec 5, 2019 22:32:23 GMT
My guess is that your using more power at night than you think you are........
Motion detectors take a lot when your a sleep and a 3000w inverter takes a lot more power to run with nothing else..........
With no more power than your using a 500w inverter would large enough..................
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Post by chachi78 on Dec 6, 2019 15:11:40 GMT
Thanks Tattoo.
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Post by playersz28 on Dec 6, 2019 15:17:31 GMT
17w of AC draw is ~170w of 12v or ~15A adding a bit for inverter loss. The load is active 14hrs which is roughly 200AH. Should last longer than 12 hrs if fully charged at lights on time but probably not until 7AM.
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Post by mediadogg on Dec 6, 2019 15:59:08 GMT
Based on the numbers being presented, the specs on the 3000W inverter, and the system configuration, I agree with tattoo that you are wasting far too much power on an over configured inverter. Depending on which suits your long term plans, I would recommend either downsizing the inverter or adding another (identical) battery, or both. You have a very ample PV supply, assuming that they are installed for best sun lighting.
Very nicely done system description by the way. Good info allows for the best analysis and advice.
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raydas
Solar Devotee
Posts: 166
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Post by raydas on Dec 6, 2019 19:13:33 GMT
Not familiar with your CC, what does "and/or looks as if it does" actually mean. Could you be a little more specific.
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Post by tattoo on Dec 6, 2019 22:50:38 GMT
Oh by the way chachi78 I have the same exact 60a CC that you have and mine works flawless...........
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russ
Solar Advocate
Posts: 63
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Post by russ on Dec 7, 2019 7:35:52 GMT
17w of AC draw is ~170w of 12v or ~15A adding a bit for inverter loss. The load is active 14hrs which is roughly 200AH. Should last longer than 12 hrs if fully charged at lights on time but probably not until 7AM. Are you discharging 200 amp hours from a 200 amp hour battery every night?
A 200 amp hour lead acid gel cell battery should not be discharged more than 50 percent on a regular basis. At 100 percent depth of discharge you can expect a little over 300 discharge/charge cycles, at 50 percent discharge, a little over 600 discharge/charge cycles, and at 30 percent about 1500 cycles.
1120 watt at 24 volt would be 46.6 amperes. That doesn't seem correct. With four 280 watt 24 volt solar panels in series/parallel you should be getting something like 60 volts (at 18 amps under optimum conditions.)
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Post by tattoo on Dec 7, 2019 13:24:01 GMT
^^^^^^^ That made me think of something since we have the same CC.....^^^^^^^^
chachi78 Are you going by the SOC% when your asking your battery draw down/depleted question?
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