Mar-14-2018 02:22 PM
Mar-24-2018 04:41 PM
Mar-24-2018 04:35 PM
lawrosa wrote:
Dont know why it wasnt posted, or maybe I missed it on my re-read... What batterys do you have?
Your 1000 watt inverter may be set for crazy alarm voltages. My krieger inverter is a 10 volt cut off with a 10.5 volt alarm.
You do realize when you runn a 1000 watt load from the inverter you are drawing 90 amps from the batterys?
Standby losses are about .5 amps.
Now you think a 3000 watt inverter will fix it? Nope. It will be worse. Technically if you tried to draw 3000 watts thats 250 amps... Ha ha ha.. LOL.
Let us know the batts you have.
Maybe its
1. you have 6 volts and they have higher resistance why the voltage drop.
2. The inverter has a high alarm value like 11.5 or something. ( post actual models.
3. You dont have enough battery and/or wire is so small you have too much voltage drop
What to do>
1. Make coffee in a stove top percolator.
2. Warm food the old fashioned way. Pots, pans, oven,
3. Forget the microwave. Buy jiffy pop. Warm coffee on the stove..
12v offers lower resistance possibly. I have not proven this yet. But I still use 12 volters.
Watch this video. Sorry I mumble
https://www.youtube.com/watch?v=wz2ttT8fFLc
And this draw test with toaster over..
https://www.youtube.com/watch?v=7p-oNT8YDIs&t=1351s
Mar-23-2018 11:27 AM
Mar-23-2018 11:23 AM
Mar-23-2018 10:02 AM
Boon Docker wrote:
I would go with with minimum 8 AWG for the run from the controller to the batteries.
Six foot run at 13 volts / 20 amps.
Loss with 12 AWG = 0.38 volts (way too much voltage drop)
Loss with 8 AWG = 0.15 volts (still a bit high)
Mar-22-2018 01:53 PM
Mar-22-2018 10:46 AM
Mar-22-2018 09:33 AM
TobyG wrote:Boon Docker wrote:
TobyG, what is the distance between the panel and the charge controller and what distance between the controller and the batteries?
both runs will be 5-6' max.
Mar-22-2018 09:19 AM
westend wrote:
You don't state the size of the inverter and that will dictate your highest current draw and your largest cable size. Most inverters have wire sizes applicable to the current. Your panel won't develop more than about 20 amp charge current so the smallest sized wire from controller to battery would be 12 AWG. 36V and maximium current from the panel would indicate 12 AWG also to be adequate.
FWIW, since I decided to have the least loss of harvest possible and had to order 100' of 4 AWG, I decided to use it for most of my runs. I bought the cable at Waytek Wire, they are local to me. A good online seller that will make custom wire pieces is Genuinedealz.com.
Here is a wire gauge calculator: Calculator
Mar-22-2018 09:10 AM
Boon Docker wrote:
TobyG, what is the distance between the panel and the charge controller and what distance between the controller and the batteries?
Mar-22-2018 08:29 AM
Mar-22-2018 12:58 AM
Mar-21-2018 05:06 PM
lawrosa wrote:TobyG wrote:
Thanks for the suggestions on equipment and just for the record I'm aware that there is no such thing as a "home panels and RV panels" I was merely trying to paint a visual for people. The panel I have is an: LG335N1C-A5 Since I can't get my pictures to work the specs on the panel are:
Vmp 34.10 V
Imp 9.83 A
Voc 41.00 V
Isc 10.49 A
Pmax 335 watt
I am only using one panel. I'm trying to decide on MPPT controllers. Currently I am looking at the
Epever 40A MPPT
or the
EpicSolar 40A MPPT
but, I am open to hear other suggestions.
I also, need to look at switchable fuses, bussbar, wire and some other incidentals. Does anyone have suggestions on what would be a good fit for my size system?
The two controllers you linked are the same controllers... Watch where you order from. The solar epic comes from hong kong.. The epever sold by ZHC can be fulfilled by amazon...
Mar-21-2018 05:05 PM