How many amps is this unit max at? Does anyone know how many 100w panels this will take? Obviously in parallel.
478643
As default setting, it will be 3pc 100W panels. And we can customized as your request. It can be up to 600W max, and it need to add 75usd
598015
Check with your electrical inspector. That being said I used 2 of the available spaces and mounted a 100 amp main. Still have 2 extra spaces and doubt I'll ever come close to using more than 100 amp. No main was required by local codes but I like to be able to kill all power to box. Hope this helped.
1980865
I finally found the current requirement for the unit. The barely visible label says 1.8 amps at 120 volts. I hope that this helps.
752589
I used it on 4 100 watt panels and it worked fine. I did replace it with a MPPT controller because I got up to 30% more from the MPPT controller.
1680256
I have SIX panels and I can't break 30 amps. The ratings are PERFECT, not reality. Line losses, connection losses, etc all drop the actual down. Just wire with the maximum thickness copper wiring you can.
2064081
This unit is a 10 Amp charge controller. That means the maximum input wattage it can handle is 120 watts @ 12 vdc. Your 500 watt panel would exceed this unit's rating. After my unit didn't work I sent it back and purchased a Morning Star, which was made in the United States.
1722745
its a 20 amp controller watts = volts X amps. So, 12 volts X 20 amps = 240 watts, so you can only hook up 2 - 100 watt panels.
974748
You run the panels to a charge controller. These put out 3.33 amps roughly. If you have a charge controller that can handle 15 amps, you could run 4 of these together.
2228315
I've been running one for about a year now, no problems except I was using the load output to control some outside lighting (on at dusk, off at dawn) and it seemed to get confused and was turning the lights on and off randomly. I disconnected it and let it sit for a day and then reconnected it and it has been working correctly since. I am running a 100 WATT 12V panel into it, are you staying within the maximum input power and voltage levels (12v/260W or 24v/520W) specified?
536231
I'm running 7 panels off one transformer and switch. I was told that 8 is the max. The instructions come with the amps per transformer. You can not run all the panels you receive off one transformer (explains why they ship two). There is an option to upgrade the transformer to one that can handle all the panels, for an extra charge.
752590
it really will depend on the specs from the panels you choose but i would say if they are similar to something like the renogy 100 watt panels you could run at least four for sure and possibly more depending on the actual output from each panel. if i was running more than 400 watts of panels i would probably start looking at some of the mppt charge controllers so you can get the most out of your system.
264926
For one panel any controller that will handle 3 amperes or more. The max output is about 2.8 amperes per panel. More panels in parallel then add up the amperes
532397
I have had 5 amps on a really good day but of course it depends on sun light. If you hook two in parallel then you increase amps and sun light surface. I have two of the 100 watt panels on my system now and can get 8 -9 amps on a good day.
2179094
According to the quick installation guide, the maximum amp draw of this unit is 100 amps and not 200 amps as stated on some posts here. How much amp it draws depends on your water usage and temperature. Temperature can be adjusted between 80⁰F - 140⁰F. It does require three 40 amps breakers and that may pose an issue when it comes to older homes. Most older homes main panel is 100 amps with little room for expansion. A 200 amp panel upgrade may very well be worth it.
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.
48504
Thanks - is the current (amps) within usual range for 450 watt power supplies? Sometimes I find on these cards that you actually need another 100 watts in PS rating just to get up to the 12v rail amps they want - not enough amps means "DOA" = RMA although the card is actually fine.
752588
I have two 275 watt panels hooked to mine. I believe I have room to add another. It is a 30 amp charge controller. B