kneal44 wrote: how does it charge 12 volt string of batteries if it puts out 37 max ?
does the charge controler convert to 12 volt systems?
MPPT controllers go well over 250 volts for power input and will charge your 12v battery just fine. My panels in series put out close to 120 volts.
Unlike PWM controllers an MPPT does not just clip voltage but converts the full wattage down to the level you need. MPPT also draws power from the panel at the panel's peak power amps and volt curve.
Volts or amps, which one do you go buy, never seen panels that put out 250 VOLTS????
Just tell me where I can buy 40 VOLT panels???
Six 40 Volt panels, wired in series will give you 240 Volts.
The advantage: smaller wire for connecting to the controller.
Further more to your 6 panels putting out 240 Volts,,how many amps do you get from those panels, If I could get that kind of power, I would put six of them on my house????
Johnny G1 wrote: Further more to your 6 panels putting out 240 Volts,,how many amps do you get from those panels, If I could get that kind of power, I would put six of them on my house????
240Volts @ 6Amps = 1440Watts.
The output of an MPPT controller connected to that array would be ~14Volts @ ~100Amps.
You would need a very large battery bank to store that energy.
Paul
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since it's basically a 24V panel, with a PWM controller, you'll only get the current you would get from a 120W panel. To be effective it needs a MPPT controller.
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Most PWM controllers will most likely smoke when a higher voltage panel (greater than your typical 12V panel) is connected. In all probably you will get zero current along with a hunk of charcoal.
ktmrfs wrote:
gandude wrote: Sharp 230 watt panel, $253. Found on my deals site.
since it's basically a 24V panel, with a PWM controller, you'll only get the current you would get from a 120W panel. To be effective it needs a MPPT controller.
Salvo wrote: Most PWM controllers will most likely smoke when a higher voltage panel (greater than your typical 12V panel) is connected. In all probably you will get zero current along with a hunk of charcoal.
ktmrfs wrote:
gandude wrote: Sharp 230 watt panel, $253. Found on my deals site.
since it's basically a 24V panel, with a PWM controller, you'll only get the current you would get from a 120W panel. To be effective it needs a MPPT controller.
My PWM controller on my portable panel will take 40V it is designed to detect 12V or 24V battery and then set the output voltage. Course it needs a 35+V panel for a 24V battery. But a 24V panel on a 12V PWM system doesn't really make sense, wasting lots of power. Newer PWM controllers seem to be designed to autodetect and work on either a 12V or 24V battery system.
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