Wow. 192 watts out of 500 watts. OMG!!!
I'm guessing even in series since my current would be small I would be using smaller batteries to bring down my arising cost.
How did you get the 36 volts minimum for a 24 volt battery?
what charge controller do I need for a 250watt panel
Collapse
X
-
Not high enough for a 24 volt battery, as you need 36 volts minimum. Your only option is to wire the panels in series to obtain 60 volts, and use a MPPT controller. If you were to use a PWM controller you maximum charge current is 8 amps and at 24 volts is 192 watts out of 500 watts. Use a MPPT and you get up to 21 amps of charge current.Leave a comment:
-
What's the Vmp?
While a MPPT controller may be important for you, Sunkings talk of doom and gloom on PWM has some hype in it. Sure if you take 16.5 amps and multiply it by 24v it looks like you've got a lot of loss. But the thing is your battery banks voltage should be significantly higher than 24v by the time your panels are putting out anything close to it's 500w.Leave a comment:
-
While a MPPT controller may be important for you, Sunkings talk of doom and gloom on PWM has some hype in it. Sure if you take 16.5 amps and multiply it by 24v it looks like you've got a lot of loss. But the thing is your battery banks voltage should be significantly higher than 24v by the time your panels are putting out anything close to it's 500w.Leave a comment:
-
What's the Vmp?
While a MPPT controller may be important for you, Sunkings talk of doom and gloom on PWM has some hype in it. Sure if you take 16.5 amps and multiply it by 24v it looks like you've got a lot of loss. But the thing is your battery banks voltage should be significantly higher than 24v by the time your panels are putting out anything close to it's 500w.Leave a comment:
-
Leave a comment:
-
Leave a comment:
-
Only way to get your full rated power from panels is to get a MPPT controller, although your panels in parallel to your current PWM controller are about as good as you can get with PWM, potentially yielding around 400+ watts to a 24v battery (during optimum conditions). If you need every ounce of power and are going to do any real work/loads get a MPPT controller, if you are playing/experimenting around the PWM is fine.Leave a comment:
-
First thing if you buy another PWM controller forces you to wire the panels in parallel and when you are done turns your 500 watt panels into 400 watt panels. PWM Controller Input Current = Output current. Wire your panels in parallel with PWM and you only have 16.5 amps at most.
Get you at least a 20 amp MPPT charge controller, wire the panels in series, and you will have 20 amps of charge current or 500 watts of charge power.Leave a comment:
-
As long as the 37.7 is the Voc it won't hurt the controller, the other thing you must check out is the size (AH) rating of your battery bank, and make sure you are not in a range that will grossly under or over charge the batteries, causing swift damage to them. With the PWM controller you will not get your rated power (500W) clear through to your batteries, but they work okay otherwise.
To get my full rated power of 500W what would you suggest?Leave a comment:
-
First thing if you buy another PWM controller forces you to wire the panels in parallel and when you are done turns your 500 watt panels into 400 watt panels. PWM Controller Input Current = Output current. Wire your panels in parallel with PWM and you only have 16.5 amps at most.
Get you at least a 20 amp MPPT charge controller, wire the panels in series, and you will have 20 amps of charge current or 500 watts of charge power.Leave a comment:
-
Quick question. I just bought two 250 watt solar panels rated at 8.27 amps & 37.7 volts each. Can I connect them in parallel to my existing pwn charge controller rated at 42 volts maximum solar input voltage and 30 amps rated load and charge current.
My system consist of 24 volt batteries
Thank youLeave a comment:
-
what charge controller do I need for a 250watt panel
Quick question. I just bought two 250 watt solar panels rated at 8.27 amps & 37.7 volts each. Can I connect them in parallel to my existing pwn charge controller rated at 42 volts maximum solar input voltage and 30 amps rated load and charge current.
My system consist of 24 volt batteries
Thank you
Leave a comment: