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Old 09-03-2016, 09:54 PM   #1
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Simultaneous Generator & Solar Panel?

Just got two T105 6 volt batteries. Can i charge them by running my Honda 2000 and my 100watt Solar suitcase at the same time? Will that top them off more quickly?


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Old 09-04-2016, 05:49 PM   #2
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Yes you can charge with the gennie while using the solar without a problem. Whether it will speed things up I'm not sure.
The charger controller may or may not think the battery is fully charged because of the gennie input and may stop putting amps into the battery while the gennie is running.
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Old 09-04-2016, 08:03 PM   #3
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Yes you can, but it probably won't go any faster. One of the controllers will up its voltage and the other will probably think it is the battery and back off.
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Old 09-05-2016, 02:26 PM   #4
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Makes sense to me. Thanks for the input!(no electrical pun intended)
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Old 09-06-2016, 02:23 PM   #5
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on my charge controler

I just add the 12 volt wires from the generator onto the input side of my charge controler where power from my panels inter the controler.
The charge controler then just sees the 12 volts as another input and pumps it into the batteries
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Old 09-06-2016, 03:13 PM   #6
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Might work for you but it is not a good general policy. Depending on your panel installation and wiring as well as the type of charge controller that you have, it might be better to put the 12 volt output from your "generator" on the output side of the charge controller. Sure you could have 12 volt panels (they go up to 16 volts or more in good sunlight) in parallel, but others might have significantly higher panel voltages with MPPT controllers and multi panel series circuits where the input voltages can go much higher (30 volts and higher) that could hurt the other 12 volt, regulated source.
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Old 09-06-2016, 03:21 PM   #7
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I was taught you should never parallel two different sources of power. If one control should fail, you could damage both. Feed them independently.
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Old 09-06-2016, 04:22 PM   #8
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Thanks for the suggestions, guys. Given my level of expertise(or lack thereof) it would probably be best for me to err on the side of caution and charge with one source at a time.


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Old 09-06-2016, 04:34 PM   #9
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Sometimes knowing too much is a limitation. In an RV we all run a converter and sometimes the engine as well. That's two sources simultaneously, each taking care of itself. People with solar let their panels run when connected to shore power. Don't back away, you will be fine running more than one source, as long as they meet at the batteries!
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Old 09-07-2016, 09:57 AM   #10
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That's a good point, Scott. I guess I just won't sweat it when I need to fire up my Honda to supplement my Solar Suitcase. Thanks for piinting that out...


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