โMar-14-2015 10:00 AM
โMar-15-2015 08:50 PM
tpi wrote:
1. Several mentioned the controller clipping when fed above rated wattage. I'm familiar with audio amplifier clipping-and I assume controller is some kind of switching power supply. What is going on when the controller is clipping? The pulses can only be to a certain level?
2. When the batteries are fully charged what is the mechanism for the controller to back off the charging? I would assume it not shunt the excess power into heat.
โMar-15-2015 05:48 PM
smkettner wrote:
22a is max with 12v panels, 11.8 is max with 24v panels.
That is the max rating. I realize the wattage is not equal but neither is the output.
why 30a at 12v vs. 22a at 24v? I just take these things at face value. Otherwise the magic smoke comes out. The current limit appears to be controlled by the heat sink temperature. (see thermal protection p6) I assume if the controller is over driven too much it may burn out before thermal protection limits the current.
Morningstar has a max amp limit regardless of voltage.
โMar-15-2015 01:55 PM
โMar-15-2015 01:43 PM
โMar-15-2015 01:19 PM
smkettner wrote:BFL13 wrote:
Repeating--
I see it is rated for 30a at 12v and 22a with 24v, but am confused by this warning-
"....Do not connect a PV array capable of delivering greater than 24 amps of short circuit current ISC at STC with 36 cell modules, or 11.8 amps with 60 cell modules....."
http://www.blueskyenergyinc.com/uploads/pdf/Manual_BSE_SB3000i.pdf
Should not be confusing. The panel will either meet the specs or don't use it.
Looks like this controller is not real good at clipping power to protect itself.
โMar-15-2015 01:14 PM
BFL13 wrote:
Repeating--
I see it is rated for 30a at 12v and 22a with 24v, but am confused by this warning-
"....Do not connect a PV array capable of delivering greater than 24 amps of short circuit current ISC at STC with 36 cell modules, or 11.8 amps with 60 cell modules....."
http://www.blueskyenergyinc.com/uploads/pdf/Manual_BSE_SB3000i.pdf
โMar-15-2015 12:24 PM
โMar-15-2015 12:07 PM
tpi wrote:
Is this panel decent? Or is there reason to buy one of the slightly more expensive panels from Solar Blvd? Friend has Blue Sky controller capable of using the 24 volt panels.
https://www.solarblvd.com/product_info.php?cPath=1_270&products_id=3005
โMar-15-2015 11:57 AM
โMar-15-2015 11:06 AM
โMar-15-2015 10:57 AM
โMar-15-2015 10:51 AM
smkettner wrote:The description of the framing, and the fact that they made an effort to discuss that.
What spec are you looking at?
โMar-14-2015 07:45 PM
2oldman wrote:What spec are you looking at?tpi wrote:Take a look at the most expensive panel on that page. Read the specs. Now go back to the cheapest one. A lot of difference there.
Is there any on this list notable for high quality?
โMar-14-2015 07:08 PM
โMar-14-2015 07:03 PM
tpi wrote:
At least from my limited knowledge, the 24 volt panels work for my friend on his bus.
1. The physical size works for him. Works with what is already on the roof.
2. Running at a higher voltage it appears from the controller documentation that the wiring sizes can be smaller. Wiring from panels to controller-which translates voltage to what is appropriate to batteries.
3. Cheaper per watt.
Thanks for the input. Ordered the panels.
tpi wrote:
https://www.solarblvd.com/index.php?cPath=1_270
Is there any on this list notable for high quality?
I don't think he cares about spending a few more bucks if it reliably translates to quality.