Hi, I'm making a solar project and I have a 7.5V solar panel (250mA & 1.9w) and a 6V battery (4.5mA) .. Is it possible to charge the battery with this panel and have a protection cut-off circuit? I searched and the only circuit that I found thats close is this one but its a 12v solar panel charging a 6V battery.http://www.electroschematics.com/474...arger-circuit/.. If I make the same circuit and change the LM317 and the resisters will it work or will I not have enough volts to charge my 6V battery?? If not is there a way not to loose the volts at the output? thank you..
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7.5V solar panel 6V battery charge
Hi, I'm making a solar project and I have a 7.5V solar panel (250mA & 1.9w) and a 6V battery (4.5mA) .. Is it possible to charge the battery with this panel and have a protection cut-off circuit? I searched and the only circuit that I found thats close is this one but its a 12v solar panel charging a 6V battery.http://www.electroschematics.com/474...arger-circuit/.. But with 2 diodes and the regulater wont the panel volts fall alot?? What can I do so I have lets say 7 volts to charge my battery?? Thanks.. -
Originally posted by Alehandro View PostHi, I'm making a solar project and I have a 7.5V solar panel (250mA & 1.9w) and a 6V battery (4.5mA) .. Is it possible to charge the battery with this panel and have a protection cut-off circuit? I searched and the only circuit that I found thats close is this one but its a 12v solar panel charging a 6V battery.http://www.electroschematics.com/474...arger-circuit/.. But with 2 diodes and the regulater wont the panel volts fall alot?? What can I do so I have lets say 7 volts to charge my battery?? Thanks..Comment
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I don't think 7.5V is going to be enough of a differential to charge a 6V battery.
Just try it with the panel hooked direct to the battery and with a volt meter, and monitor the battery voltage every 30 minutes or so, and see if the panel can charge it.
Adding a diode or regulator will reduce the voltage below what can charge the 6v battery.Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
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Ah probably not
Generally you want your voltage at max power to be approx 1.5 times battery voltageNABCEP certified Technical Sales Professional
[URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]
[URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)
[URL="http://www.gaisma.com"]www.gaisma.com[/URL]Comment
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Just to keep life simpler and avoid duplication, we prefer that you ask a particular question only once.
So, for further traffic on this, let's just continue to use this thread.
Thanks.
----moderatorLast edited by inetdog; 03-30-2014, 09:32 PM.SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
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