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Old 01-03-2016, 04:29 PM   #11
Skoolie
 
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Your not the only one getting under achieving solar results right now but, my bus is parked in the worst possible location at the moment. I'm further north in Rhode Island my panels are facing west and east with trees on bothe sides. I have roughly 1800w in panels at 72v nominal to 8 x t105s (two strings at 24v) using a midnight 150 as well. The best I've seen is 180w. 10%. Which is good enough for my lights and DC fridge while my bus is still under construction. I'm still plunged into the house until February when we cut the umbilical and drift away.
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Old 01-03-2016, 07:19 PM   #12
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Charles_m, I'd love that price, that's what I paid for my 250s.
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Old 01-03-2016, 07:28 PM   #13
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So in Denver we are graced with 300+ days of sunshine. We are at 40 deg of latitude. So at the Suns lowest point, winter solstice, our optimum panel angle is around 60ish degrees. I imagine in northern RI your Lat is around 45+ degrees. Making your optimum angle about around 65-70 degrees...which is a lot. Might as well mount the panels straight up if you're any further north.

My panels sit at 20ish degrees to avoid shading of the panels behind. I think next weekend I'll try to lift the area where the panels rotate so I can get a little more tilt out of them. I'll give that a shot for a week and see if it makes a difference.

I bet your glad you went with 1800w! I'd love to see your roof layout
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Old 03-07-2016, 09:10 PM   #14
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I wanted to share a recent answer to my low solar output question. I recently expanded from 1000w to 1500w. Changed from 4in series over to 2 strings. However, before all that I noticed something very important when reviewing my daily solar output graph (woot midnite solar). I was looking at the wrong thing! It was more a question of INPUT. I have my bulk charge set to 58.3 volts, that because my POS inverter over faults at 59v. The midnite 150 does an amazing job at regulating charge voltage. All the midnite 150 uses to keep the battery in that voltage during bulk is what it needs, not what the panels produced. My KWh reading was what it put in the batteries, not what the panels actually could have made.

So one sunny day, I get this thing pissed off! I run the a/c unit, all my power tools, radio, charge phone, freezer. All off the inverter (almost 2000w consistent). The night when I looked at the screen, low behold a 4KWh day! Holy **** self! After that day the kWh Ingested were simply 3.0, then 2.5, then 2.0. So problem solved, or more like clarified. I hope this helps someone in the future.
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Old 03-08-2016, 10:11 AM   #15
Skoolie
 
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I also experienced the same situation with my midnite 150. I hadn't seen over 300w from my system until I stared running the a/c unit. As soon as I turned on the A/C power jumped from 300w to 1100w. I haven't tried loading the inverter with more then the a/c so it is possible that my set up could produce more.

I'm currently in Central Mexico with 1/3 of my panels pointing to the west, 1/3 pointing straight up and 1/3 pointing to the east. Roughly 45 degrees.

Check out our blog for the photos of the build and our adventure south.
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Old 03-08-2016, 10:13 AM   #16
Skoolie
 
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Quote:
Originally Posted by Destroymix View Post
So in Denver we are graced with 300+ days of sunshine. We are at 40 deg of latitude. So at the Suns lowest point, winter solstice, our optimum panel angle is around 60ish degrees. I imagine in northern RI your Lat is around 45+ degrees. Making your optimum angle about around 65-70 degrees...which is a lot. Might as well mount the panels straight up if you're any further north.

My panels sit at 20ish degrees to avoid shading of the panels behind. I think next weekend I'll try to lift the area where the panels rotate so I can get a little more tilt out of them. I'll give that a shot for a week and see if it makes a difference.

I bet your glad you went with 1800w! I'd love to see your roof layout
Check out the roof layout on our blog bellow.
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Old 03-11-2016, 01:32 PM   #17
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Wow Big11beard! That's quite the setup you have going on. I do like the utilization of your roof space too. My wife and I are proceeding to read thru your blog, its fantastic! I'd like to PM you a couple questions if you don't mind.
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Old 03-12-2016, 04:42 PM   #18
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Originally Posted by Destroymix View Post
Wow Big11beard! That's quite the setup you have going on. I do like the utilization of your roof space too. My wife and I are proceeding to read thru your blog, its fantastic! I'd like to PM you a couple questions if you don't mind.
Ya, send me a PM. It may take a coupe, of days to respond being on the road
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