What is the maximum unregulated voltage of one panel?
322229
Renogy brochure lists:Open circuit voltage (VOC)= 22.5 VoltsOptimum Operating Voltage= 18.9Volts
322230
The open circuit/no-load voltage for this panel is about 22 volts. The voltage falls quickly when any load is applied, suggesting fair amount of internal resistance. I bought the Harbor Freight 45 watt, 3-panel kit a year ago to experiment with, and each of its panels also put out 22 volts with no load. Its behavior under load was similar. The Renogy has better reviews, and you get more output for the amount of surface area. Good luck.
322231
22.5 Volts At Its Peak - It Needs To Be Harnessed With A Voltage Regulator IMO.
1170494
This Fan's voltage range is listed on the package as "voltage range 4.5~13vdc". Based on that range, 13 volts DC is the max it can handle. Provided that your inverter's output is at a stable 13.1 Volts DC, then 13.1 volts is overrange by one tenth of a volt. Is that enough to kill it? Probably not, but use at your own risk, or ask the manufacturer directly.
2276884
If you measure the voltage with no load, it is much higher. The typical open circuit voltage (or no load voltage) on these panels is about 21V.DC. Once you put them into a charging circuit for a battery, they drop to somewhere around 12V.DC, depending on the condition of the battery.
1210704
Maximum input wattage to the controller for a 12 volt system is 400 watts and max as a 24 volt system is 800 watts, so 4 250 watt panels would exceed maximum input for the controller. Hope this helps.
1283053
31.666 amps is where you are with your 4 panels. I agree with AT... You need a larger charge controller or research using multiple controllers.
1112793
The maximum voltage that these panels, in series, can get up to is roughly around 45 volts. So any voltage meter/monitor that you get should be able sustain at least that much voltage.Thank you,AW
1180037
DC Output : 19 V with max. 1.58 A current. If this is what you are looking for.
1440425
Divide the maximal amount of watts (1500) by the number of volts (120). That would be (12.5). I would trust the manufacturer's claim of 12.6.
1920937
Open voltage is not the issue. Make sure it is a 12 volt panel for a 12 volt controller. The important thing is the amps the panel puts out, the controller needs to have a higher amp rating than panel output amp rate.
191586
Maximum output current: 15 amperes Reference - User's Manual: http://www.p3international.com/manuals/p4490_manual.pdf
1756513
My input voltage is 124VAC and the output is 12.1 VAC, so I would have to say that the output is regulated. I would expect higher output from an unregulated transformer. (I am not planning to open the enclosure.) My DC LED lamps work fine, they have built in rectifiers and resistors to accommodate DC/AC 12 volts.
830725
If you are asking how many panels it will handle I am using (1) 255 watt 33 volt module and it is rated max is 260 watt it is handling it great
444847
Yes, 30 Volts is Over Voltage for sunforce to Handle it, Most of the solar panel run 18 volts Average, 30 Volts is too much to regulate, it may fry the Regulator.
2077096
Yes, I use that size panel too, inverter works good. Any panel voltage should not exceed 60 volts, watts should be well under 600 watts, so no more than 2 of those panels
1880650
The output of the PV panel are 2 wires. You need to provide your own connectors at the PV panel leads. FYI, after placing the PV panel under the sun, we used a voltmeter to measure the output voltage. Under no load, it produces + or - 20 volts. I'm not to sure if you could put some type of rheostat between the PV panel and your device that you want to power to limit the output voltage to 12 VDC.
1806277
There are too many variables to give a definite answer. ie. Are you using an individual controller for each panel or one controller for all three? Have you considered back flow from one panel to another? How about voltage or amperage input to the controller(s)? Also, the 128 watts is an ideal, under perfect conditions result. Do not expect to produce this much power. They are good, useful panels, but I don't know of any panels which produce their rated power consistently.
264283
I am not sure what kind of answer you are looking for. But as a guess, you are unsure about the open circuit voltage. With no load on the panel it will put out the maximum designed voltage, but when loaded, the voltage will drop. Maximum efficiency with this panel is around 17 volts. You can still charge a battery with direct connection to the battery, but be aware that if the battery is near full charge that there is a possibility of over charging. With this in mind it is advisable to have some sort of solar charge controller between the panel and the battery. The solar charge controller should be designed to adjust the power consumption from the panel to maximize solar panel efficiency as well as monitoring the battery charge state. Using the panel alone will work, but there is no guarantee as to battery charge status or battery health verses time.