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Forum Index : Solar : charge contoller size
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blowit Newbie  Joined: 22/06/2011 Location: AustraliaPosts: 5 |
Hi im starting project i have 4 200 watt panels 12volt system have 16 6 volt 100amp sealed batterys so total is 800 amps. I have a gsl mppt 60 amp regulator is this regulator ok to do job could i ad more panels later on or would i have to go bigger than 60 amp regulator let the wind blow |
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| windlight Guru  Joined: 03/03/2007 Location: AustraliaPosts: 331 |
Volts x amps = watts so 200 watts divided by 12 volts = 16.6 amps now when we multiply this by 4 we get 66.4 amps so no a 60 amp regulator will struggle with what you already have. Have you considered a 24V system, I mean 8 parallel strings of 16 6V batteries is not a good start. Oh and it is amp hour so what you have at 12 volt is potentially 800 amp hour of batteries @ I suspect the 100 hour rate if they are deep cycle batteries as opposed to vehicle start batteries. Grumpy Allan OK I have taken a be nice pill, please explain your intentions/requirements a bit more because at the moment you are not very clear even accepting that English is not your first language. Googled gsl GSL increase your panel output by up to 30%, without paying more, with the revolutionary MPPT series using the technology that won GSL the prestigious “2008 EDN Innovation award”. This innovative solar charger is extremely cost effective, efficient, compact and easy to use. Reliability is enhanced by a multilevel over temperature protection and a robust maximum power tracking algorithm. With our new BMPPT (Booster Maximum Power Point trackers boundaries that existed have been eliminated with the ability to charge higher voltage batteries from low voltage panels. And it has Dawn to Dusk or LVD Yes(DtoD Via MCM) GSL appear to be a reputable manufacturer/supplier, just so you know I am not putting them down. This last bit is not aimed at the original poster, I am constantly amazed at the gobbly gook used to promote products. "I like this place and willingly could waste my time in it" - (Act II, Scene IV). |
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| blowit Newbie Joined: 22/06/2011 Location: AustraliaPosts: 5 |
hi i have considered going 24 volt, i want to buy a bigger inverter any way, i have been running 1200watt inverter tst brand 12volt connected to 4 6volt wet batterys 225amp each running a small fridge radio lights power tools charging battery tools. This is at my weekend gettaway property in the bush now i am spending longer periods out there i need a bigger fridge washing machine water pump water pump ill probley go 12 or 24 volt allso my batterys are deep cycle let the wind blow |
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| windlight Guru Joined: 03/03/2007 Location: AustraliaPosts: 331 |
OK you still have the makings of a good weekend system, whether you stay with 12v or go to 24V, if you stay with 12V and purchase a larger capacity inverter you will have a back up unit. Either way you configure the batteries you have the same storage capacity. If your MPP controller is 12/24 @60 amps then a 24V system will let you double your solar panel numbers and still be within the rated 60 Amps, just something else to think about. At 24v you will have 400 A/h of battery storage and of that you will have 30-40% of that 400 so as not to cycle them too deeply. That equates to around 3 kW @ 30% depth of discharge (DOD) or 4 kW @ 40% DOD. With load scheduling to times of incoming solar power you should have a handy weekend system. I used your original stated battery A/h figures. Allan "I like this place and willingly could waste my time in it" - (Act II, Scene IV). |
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| blowit Newbie Joined: 22/06/2011 Location: AustraliaPosts: 5 |
Hi Allan im back with another question if i go 24volt. My 200 watt 12volt panels i wire 2 in series i get 24 volts does the watts go up or stay at 200watts over the to panels John let the wind blow |
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| windlight Guru Joined: 03/03/2007 Location: AustraliaPosts: 331 |
Watts stay the same, you neither gain nor loose available power, basically. Watts = volts x amps. so if you place two 200 w 12V panels in series for 24 volt you get, 24V x 16.6A ( the amps per panel)= 400W ( the summation of two 12 volt panels ) See my last comment, I suspect your controller is a 12/24 volt 60 amp unit. Allan "I like this place and willingly could waste my time in it" - (Act II, Scene IV). |
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