yurtdweller
Solar Newcomer
I am a modern-day nomad. I live in an off-grid yurt for up to 9 months each year.
Posts: 21
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Post by yurtdweller on Jul 23, 2018 2:33:11 GMT
I have a question about an amperage reading that I recorded recently. I’m running two rng-100p panels in parallel. I have a victron power meter connected to my system. I am currently living at nearly 7000 feet elevation, in Colorado. I read in the panel’s spec sheet that each panel is rated Optimum Operating Current (Imp): 5.62A Short-Circuit Current (Isc): 5.92A, but I recently recorded incoming power at 12.2 amps(2 panels) , 154 watts. Am I getting higher-than-spec reading because of my location? Is there something wrong with some part of my system? I’m planning to purchase a new charge controller, soon, and will also be buying more panels as time goes on, and I want to make sure that my array does not overpower my cc. Is this something that I need to be concerned about?
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Post by tattoo on Jul 23, 2018 2:45:12 GMT
How hot has it been there? Temp will really effect that reading....
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Post by Guest on Jul 23, 2018 12:39:18 GMT
yurtdweller panels can be better than spec cloud effect, the edge of a cloud can magnify the sun there are some solar calendars for parts of CO, below is a link to some near boulder, CO look at various days and not the red line (global watts/meter squared), 1000 is what panels are tested @, @ 20 or 25 centigrade. Heat doesn't effect a PWM controller much. Now look at July 19, 2018 and note the peaks up to 1200. This is likely cloud effect, result in 20% extra power! Better controllers can limit input power to not cause any issues. midcdmz.nrel.gov/apps/calendar.pl?site=NWTC&year=2018&month=7With an mppt controller you should consider COLD as it increases output. morningstar has a string calculator that considers both hi and low temp conditions, pick renogy panels and any ms controller to see the results. string-calculator.morningstarcorp.com/ |
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Post by tattoo on Jul 23, 2018 16:32:35 GMT
yurtdweller panels can be better than spec cloud effect, the edge of a cloud can magnify the sun there are some solar calendars for parts of CO, below is a link to some near boulder, CO look at various days and not the red line (global watts/meter squared), 1000 is what panels are tested @, @ 20 or 25 centigrade. Heat doesn't effect a PWM controller much. Now look at July 19, 2018 and note the peaks up to 1200. This is likely cloud effect, result in 20% extra power! Better controllers can limit input power to not cause any issues. midcdmz.nrel.gov/apps/calendar.pl?site=NWTC&year=2018&month=7With an mppt controller you should consider COLD as it increases output. morningstar has a string calculator that considers both hi and low temp conditions, pick renogy panels and any ms controller to see the results. string-calculator.morningstarcorp.com/Get um Bird...... |
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yurtdweller
Solar Newcomer
I am a modern-day nomad. I live in an off-grid yurt for up to 9 months each year.
Posts: 21
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Post by yurtdweller on Jul 23, 2018 22:52:17 GMT
Ok! Thanks, gang. I hoped it was something like that. I’m totally off grid, and, as my screen name, living in a thin skinned yurt. Temps were at or near 100, recently. And this reading was taken during the hottest part of the day. Not sure of the exact temps at that particular time. I will note temps if I see these kinds of readings again. I will soon be relocating to south Texas, and will be attempting to winter on solar down there. I imagine I will have to upgrade with a better cc, or another panel, or both, and I honestly enjoy studying the crap out of my options. I figure a 40a mppt cc will probably be best. Will probably let me keep adding panels, literally, for years. First at 12v, then I’ll switch to 24 when I max my amps. Atm, using a lifeline 105a battery, I can run my workshop all day, and have enough left for lights, pc, and phone for several, up to 5 hours, without ever going below 80%. I do not, however, currently have any temperature sensors, so, will need to get that, before I get another battery.
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Post by Guest on Jul 23, 2018 23:49:06 GMT
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Post by tattoo on Jul 24, 2018 13:39:00 GMT
Yep it's Bird all right..... LOL What you hiding from bird..... LOL |
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yurtdweller
Solar Newcomer
I am a modern-day nomad. I live in an off-grid yurt for up to 9 months each year.
Posts: 21
|
Post by yurtdweller on Jul 24, 2018 16:41:07 GMT
Yep. My lifeline battery, love it. Have read manual repeatedly, and chatted with company, too. Will probably get more batts from them in future. Thanks for white paper link.
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