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 > Your search for posts made by 'JiminDenver' found 1302 matches.

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RE: Interest in mismatched panel test?

The 4th graph also shows a low Varray. Perhaps the controller wasn't in full MPPT mode and keeping the Varray low? The 220w mono was first in the graph and while it does get a higher Voc when tracking that the 230w, it is affected easily by lost of light like being flat. The Voc of the 230w is pretty normal for it. In the graph for the 250/230 and then 220 in parallel you can see how the 220w pulls down the 250w even though the 250w has the highest Voc of all. Still waiting for a cloud to pass to see if the 220 crashes the whole array.
JiminDenver 05/30/15 04:33pm Tech Issues
RE: Interest in mismatched panel test?

Remember that these panels are flat, not tilted so i don't expect peak out of them as if they were tracking. That may be the lower Vmp. The Voc is where I expect it roughly.
JiminDenver 05/30/15 04:21pm Tech Issues
RE: Solar-Panel to Controller Loss

It's been said before that if you are going to be in a very sunny location that there is no huge advantage to MPPT. Be in the PNW or like me deal with daily afternoon clouds and MPPT shines. Like many things there isn't a better, there is just different ways of doing it. (dispite the hype) We always ask for loads but we don't often ask for conditions, time of year, etc. In my case I need as much as possible, as early as possible to get my charging done before the afternoon clouds. Early on is when PWM is at a disadvantage for me.
JiminDenver 05/30/15 03:38pm Tech Issues
RE: Interest in mismatched panel test?

So In parallel everything is about where I expected it to be. The 220 is definately a drag on either the 230 or the 250. The 230 and 250 play fairly well together exceeding 30a but that's what I would expect out of a pair of 230's. The amps from the 220/230 in series was close to the same as they would have been separately added together and in parallel. A few amps here or there but no huge difference. In parallel I did see the most but only by a amp or so. Everything was lower in the 220/230/250 series test than the 250/230/250 or the three 250's together. The 220 is limiting the other two and would even more if a cloud passed by. It is affected much more by overcast skies than the polys.
JiminDenver 05/30/15 03:24pm Tech Issues
RE: Interest in mismatched panel test?

CA With the three 250w polys the controller has no issues adapting to changing light. It did eventually adjust in the first 4 panels series test but I had gone to change the leads around so I didn't see it until I was studying the graphs last night. Today I started out with a series test on the 230w poly and 220w mono. This is a full chart with the watts http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230%20series059.jpg~original width=600 This without the watts for a better look at the numbers. http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230%20series%20no%20w066.jpg~original width=600 For a basis I ran the panels separately to see what they did on their own. First the 220w mono, then the 230w poly. With the watts http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230%20single060.jpg~original width=600 without http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230%20single%20no%20w061.jpg~original width=600 Then I did a parallel test. No branch connector, I simple crammed both sets of leads into the controller terminals. It's not perfect as one set of leads is longer than the other but you get the idea. http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230%20parallel062.jpg~original width=600 http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230%20parallel%20no%20w063.jpg~original width=600 After that I brought out one of the 250w and did a parallel test with first the 230w and then the 220w. Then I finish it with all three in series. http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230250%20parallel064.jpg~original width=600 http://i78.photobucket.com/albums/j114/Jimindenver/solar%20charts/220230250%20parallel%20no%20w065.jpg~original width=600 These were all in bright sun. I'm hoping for some over cast so that I can record the effect of the mono taking a dive on the rest of the array.
JiminDenver 05/30/15 02:57pm Tech Issues
RE: Solar-Panel to Controller Loss

BFL Tracking all of my panels exceed the rated Isc. Even flat the 250ws were running in the 9 and 10a range consistently. Tracking they pop the 10a meters with ease, so I'll see if one of the logs will tell me how high they get lined up.
JiminDenver 05/30/15 09:48am Tech Issues
RE: Solar-Panel to Controller Loss

I believe jr has the ticket. MPPT and PWM as we describe it are just two different ways of doing it and beyond the hype, what you choose should be situation specific. There isn't a huge difference in bright light if that's all you care about. In my case the altitude makes the situation very specific. My panels wake up with frost on them most mornings and it's over cast most afternoons. MPPT gives me the most early when I need it and milks the most from the clouds once they roll in. PWM would be fine if I had long sunny days and I didn't have to worry about being in float before 11 am or noon. So when suggesting a system knowing things like where, when and conditions are as important as knowing the loads, roof space and budget. There is no one size fits all except if you over build you will likely be ok. BFL Thank you for the efforts. There are always formulas and concepts of what should happen but it takes some one pushing the button for real to see what really happens. You are dealing with PWM vs MPPT, for me it was mono vs poly and now mismatched panels. Yesterdays test has me thinking about buying a forth 250w for $170 while I can. Someday I might expand or need to replace a panel and would hate to have to replace all of them to get the controller to work right. . The ability to expand later without having to have a exact match should be listed as one of the advantages of a PWM system.
JiminDenver 05/30/15 09:35am Tech Issues
RE: Interest in mismatched panel test?

Tomorrow morning looks good but if I can't rerun the test I'll cut up the logs. The panels are on the drive on 1x3's to give them some ventilation. As a load I used a oil filled heater with 600/900/1500w settings to bring down the voltage. Even getting down in to the 12's didn't cause the controller to change after it had been connected to all four panels while cloudy. It's like it picked a point and gave up. I've seen the same 20a with three panels in overcast skys as I did with four. Connected while it was sunny and at times the array was providing 100 watts more than the controller was delivering. I can figure a way to do a parallel test tomorrow between two panels.
JiminDenver 05/29/15 07:49pm Tech Issues
RE: Interest in mismatched panel test?

So I was able to get some series test in today between the clouds. I should have logged separate graphs for each test but I did one log and am using the voltage of the array to tell what I was testing. It didnt seem like putting the 230w poly in between the two 250w polys made a big difference watching the outputs of amps and watts. A little less but not much. What was odd was connecting all four panels in series. by the time I got to that test a cloud bank had rolled in but I was pulling 20a when there was no sun to be seen. I did some yard work while the cloud passed and was ready to see the controller max out when there was clear sun but it never happened even though there was 970w in series and the Voc was 130v. I re ran the test starting with the 3 250w, then 2 250w and the 230 and finally the four together. This time the four together were hooked up in bright light and the output was better but not what I expected from four panels. The watts out stayed around 660w and the amps were not that far above the three 250w and certainly not the additional 16a I know the 230w is capable of delivering. There are a few spikes, one up to 800w and 58a but only for a moment and then it dropped back down. so some how the off panel did affect the controller. It just seemed to have a hard time tracking in the first test and even when it did in the second it didn't produce enough extra to warrant the cost and hassle of mounting a forth panel. I hope to rerun the test tomorrow so that I can make separate graphs and show the different results. I'll try and get the 220w mono in the test too.
JiminDenver 05/29/15 03:34pm Tech Issues
RE: 60 Cell Panel vs 24v Bank and MPPT vs PWM at 24-24

Any time your convert something there is a loss to be dealt with. At least the loss is the same between my two controllers. It was pleasing to see the Eco-w could keep up with the MS. I still think it and a 24v panel make a quick, clean, inexpensive set up if it meets the need.
JiminDenver 05/27/15 06:15pm Tech Issues
RE: 60 Cell Panel vs 24v Bank and MPPT vs PWM at 24-24

I've never done a 24v test with my Eco-w's. Also at 12v the much dryer air and altitude make for a lop sided test in my opinion. That said, my 250w panels easily hit 18.5a and 226w. In series they are a bit less impressive at 48a and 660w. If BFL had a "respectable" controller he could run both of his panels in series against the two in parallel on the 30 to see if a higher voltage would give the MPPT something to work with. :P It looks like I wont be getting any more comparison test in with the Eco-w and Schott 230w. I never updated the ad but someone wants to buy it this weekend and I wont have sun until Sunday. Oh well, I need batteries more than test. lol
JiminDenver 05/27/15 05:18pm Tech Issues
RE: 12v 24" TV found, pricy at $523

!2 volt tvs are a good idea, but everything else we use like our Blu-ray dvd player, HD satellite, Bose and game systems among other items would all have to be 12 volt. Just easier for us to have a small pure sinewave inverter to power them all. No worries as we have solar and genny to bring life into our batteries daily. Plus, most 12 volt A/V equipment is produced by no name companies with the exception of Jensen, and they'll never be known as high-end. We had a 15 inch Toshiba TV/DVD player that I replaced the 120v brick with a 12v cord and it worked great. Then we got a satellite that required 120v so we run both off of a tiny 150w inverter.
JiminDenver 05/26/15 06:46am Toy Haulers
RE: The come back of I-6's

I believe it was a 223 in line in my 60 F 100 panel truck. So under powered we called it the lead sled. Had a Dart and a van with the 225 slant six, not to bad in the dart, a dog in the van. My favorite in lines were the two 300's in my Econolines. One was in a 75 E100 that was a work and tow truck until 2002. It would turn over three times and start no matter what. The body eventually started falling apart but you couldn't kill the engine. The V6's in my last Econoline and F 150 just couldn't handle work like the 300's could. I'd love to see a reworked 300 to todays standards with Eco-boost and a good tranny. Just imagine the torque it would put out for towing.
JiminDenver 05/25/15 09:55pm Tow Vehicles
RE: Eco worthy 20a MPPT vs TS-MPPT-60 and series test

I haven't had much of a chance to play lately. They reported one sunny day this month and I can confirm it. They say it will get better but the pattern will continue till fall. It's a good thing the system has the punch to push the bank around when the sun does shine and the ability to keep us off the generator when it doesn't. Seeing 12a during a afternoon rain made me as happy as when the A/C ran.
JiminDenver 05/25/15 06:36pm Tech Issues
RE: Running A/C on solar.

you are right, you see the utilities are fighting Solar, well residential solar. you think you're paying for those subsidies, Wait till you see your bill go up when the utilities start putting up their own arrays and adding the equipment cost to your bill. They don't care that residents pay 10s of thousands and won't see a return for decades. They see it no different than building a new power plant and getting you to foot the bill while getting free power to sell you forever.
JiminDenver 05/25/15 01:56pm Travel Trailers
RE: Inverter Generator VS Regular Generator

There are some interesting misconceptions here. The 120v only version of the Champion has a pretty clean sine wave, it runs at 68 db, 3 db louder than the Honda Handi/ Champion 3100i under load and closer to a pair of 2000w running a A/C. A sound tent will reduce the db to 65. That said, I own one and would never consider running it in a dry campground. It's simply too loud as are all generators in my opinion. I would buy the quietest thing I could find if I knew I was going to have to. It is also a thirsty beast while running the A/C, more that a few hours mid day and I'd want hook ups.
JiminDenver 05/24/15 10:06pm Travel Trailers
RE: Running A/C on solar.

The three 250w panels will run the 5000 BTU A/C mid day when the sun is shining and that's when I need it. I don't need it when it clouds up, it's cool at elevation in the evenings and we run the furnace at night. The system is designed to meet our needs which are very specific. It took over a year to work it out, find the right A/C, panels, controller and inverter that could handle the start up surge. That said, even if you had the batteries to run it over night, three panels couldn't support it. There is only about 10a left over while running the A/C and that's not going to replace what you used over night. Also considering there will be evening times when the panels are not putting out full potential, the batteries are already running it partially, not just when it's dark. I did see a you tube where like me the guy could run the A/C while the solar was going but at night the inverter shut off even though his batteries were full. Without the solar the start up surge was too much for his batteries even though the controller display and a Kill a watt couldn't see the voltage drop. It happens so fast that even my clamp on only has a chance to jump about 7a before dropping unless the compressor struggles a bit, then you see it jump to over 120a. Run it for a few hours draining the bank farther and the restart after the compressor cycles will be even harder. Two 6v wont start it and I'm willing to bet four 6 volt wont be able to do it after running it for a while. Remember I'm talking a efficient 5000 BTU unit, not the roof top. Just getting one of those to start is impressive, restarting after running it for hours.... Panel prices have been low but I think the Chinese pushing the cost down is a response to the tariffs. I have heard more than once that prices are going up due to the tariffs and to get your shopping done now. One of the people was the owner of the company that made my panels and our deal was done, so he wasn't saying it to sell me anything. My 750w was $525 and his 280w panels were $220 but too big for me to use.
JiminDenver 05/24/15 08:25pm Travel Trailers
RE: Running A/C on solar.

I can't run our roof top A/C but I can run a small window mount 5000 BTU A/C pulling 450w running off of three 250w panels and still have something going to the batteries. It's enough for us because we rarely need it at 10,000 ft and then only if the sun is shining.
JiminDenver 05/24/15 07:50am Travel Trailers
RE: Solar-Panel to Controller Loss

It's all about balance BFL, what is it worth to you is what's important. 255w sounds like a Mono. It is a poly Canadian Solar (made in China) CS6P-255P with Vmp 30.2, Imp 8.43 and Voc 37.4, Isc 9.0 I have it on the Eco-Worthy and they seem to be working well together. I need proper blue sky to do proper testing, whenever that happens. My 220w is a Canadian solar. I'll be interested in how it works out. I've seen the Eco-w's for $85 in auction on ebay.
JiminDenver 05/23/15 11:50pm Tech Issues
RE: How HI and LO you been?

High...Mount Evans at over 14,000 ft. We camp around the same altitude as the CD. Lowest that I knew of was sea level.
JiminDenver 05/23/15 11:47pm Truck Campers
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