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Old 02-06-2016, 05:03 PM   #1
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What is your solar charge rate at this time of year?

in sf bay area, sunny at daytime but a little chilly at night. at 11am, i am seeing 30a charge rate going into the batteries. on a 1200w flat mount system i am curious if it's about right or there are rooms to tweak. what is yours like?

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Old 02-06-2016, 06:14 PM   #2
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You might try to tilt your panels, it would help this time of the year when sun is low in the sky, and I do not know what size your solar wiring is, to small of wiring will have some voltage drop problems.

Here in Quartzsite at noon I am getting 45 amps of charge with a 900 watt system.

A good solar blog is here.
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Old 02-06-2016, 06:24 PM   #3
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How many panels do you have. It doesn't seem like you are getting enough charge.

I have 335 Watt between 3 panels mounted flat. I can get 15-16 watt at full sun light. Last year I covered 2 of the panels at a time to check and made sure they were all putting out proportionally.

When I first bought the coach I didn't think I was getting enough charge and found that 2 of the 3 panels weren't charging. Contacted the manufacturer (Kyocera) and they replaced them free of charge.

If you have multiple panels check each of them by covering the remaining ones.
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Old 02-06-2016, 06:27 PM   #4
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Here in Quartzsite at noon I am getting 45 amps of charge with a 900 watt system.
900w gets that much is excellent. are you tilting the panels?
quartzsite has stronger sun.
my panels are 48v. #6 wires coming down and #4 to the batteries.
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Old 02-06-2016, 06:31 PM   #5
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How many panels do you have. It doesn't seem like you are getting enough charge.

If you have multiple panels check each of them by covering the remaining ones.
5 panels. good idea to check each
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Old 02-06-2016, 09:10 PM   #6
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CountryFit, yes my panels this time of year are tilted 40 degrees this time of year and lay flat about sometime in May.
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Old 02-07-2016, 08:34 AM   #7
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on a 1200w flat mount system i am curious if it's about right or there are rooms to tweak. what is yours like?
I posted about this recently (Solar Power Winter Update - JdFinley.com). In general, in AZ, between 50%-60% rated output during the winter months and 80% in the summer months.
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Old 02-07-2016, 09:48 AM   #8
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I posted about this recently (Solar Power Winter Update - JdFinley.com). In general, in AZ, between 50%-60% rated output during the winter months and 80% in the summer months.
thanks jd. nice write-up on the topic in your blog.

for my 1200w flat mount sys, at this time of the year, per your experience i should get no less than 50% of it, ie 600w. current 600/13.4 = 45a. this is for location of yuma or quartzsite.

hmm, in sf bay area, 30a is kinda low, expecting maybe around upper 30ish?
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Old 02-07-2016, 10:33 AM   #9
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Thanks - appreciate that! Yes, near Lake Havasu, AZ (not far north from Quartzsite). My winter months have all been taken in the southern halves of AZ and NM. Spring/Summer/Fall locations range from AZ/NM all the way north to Montana.

Yeah, if your 30 amp/13.4 volt is noted on a clear sunny day, it does seem a bit low. I'm not very familiar with the MidNite controllers but appears yours was in absorb mode at the point the photo was taken. You might try getting the battery bank discharged a bit (75% or so) and then see what the controller reports for output. Meaning, it may be reporting the output from the panels that it is current using, not what is actually available. Dunno... pure speculation on my part.
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Old 02-07-2016, 11:51 AM   #10
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Thanks - appreciate that! Yes, near Lake Havasu, AZ (not far north from Quartzsite). My winter months have all been taken in the southern halves of AZ and NM. Spring/Summer/Fall locations range from AZ/NM all the way north to Montana.

Yeah, if your 30 amp/13.4 volt is noted on a clear sunny day, it does seem a bit low. I'm not very familiar with the MidNite controllers but appears yours was in absorb mode at the point the photo was taken. You might try getting the battery bank discharged a bit (75% or so) and then see what the controller reports for output. Meaning, it may be reporting the output from the panels that it is current using, not what is actually available. Dunno... pure speculation on my part.
We ran home from Yuma for some game going on today!)... But will be back to Yuma on Monday. We're on shore power, so at 100%SOC, so our MidNite should go into float mode very early in the day.

I'll check our numbers and share. We too have 1200W 48V of panels (5 X 240W Sharps/Panasonic High Efficiency), flat mounted. And yep, we're further down South then you are! But, always good to compare info.

We've also just completed our 1st full month on a home Solar Panel system. Yesterday was pretty sunny in San Diego, and we produced 40kWh for the day. 315W panels X 24 = 7560W. (With three more 330W panels coming early next month, for a total 8550W in the future.) All running with Eephase Microprocessors.

Looking forward to learning how the Home works vs RV, as while many items are similar, many other areas are for sure different.

24 Microinverters
1 Envoy Ethernet Ethernet
San Diego, CA
E3 icon sqr normal System Normal
Full System
EnergyStatus
Today
11.4kWh
Peak Power: 5.70kW at 10:40 AM
Latest Power: 5.70kW at 10:40 AM
Past 7 Days
238kWh
Month To Date
238kWh
Lifetime
769kWh

Will post back my RV systems numbers on Tuesday afternoon, as we will be getting back to Yuma late Monday.

Best to all,
Smitty
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Old 02-07-2016, 01:15 PM   #11
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24 Microinverters
1 Envoy Ethernet Ethernet
San Diego, CA
E3 icon sqr normal System Normal
Full System
EnergyStatus
Today
11.4kWh
Peak Power: 5.70kW at 10:40 AM
Latest Power: 5.70kW at 10:40 AM
Past 7 Days
238kWh
Month To Date
238kWh
Lifetime
769kWh
hey smitty, you have real robust systems - for rv and now for home. with year round sunshine in sd, it's hard to beat. wondering it's grid-tie or off grid. either way you will save big in a long run.

looking forward to your rv solar numbers... have fun with the game
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Old 02-07-2016, 02:31 PM   #12
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We hit 1200 W yesterday flat mounted panels (1420 W rating). But we are at 20.47 N in Yucatan. We try to be where the sun is aka "Goldilockers" as I'm "not to hot and other to cold!".
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Old 02-07-2016, 02:36 PM   #13
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Did someone say tilt the panels?
https://play.google.com/store/apps/d...olartilt&hl=en

Will calculate the best tilt angle for your location and then you can use the accelerometers in your phone or tablet to set that angle by holding the device on the solar panel to check the angle. I use it and I like it.
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Old 02-07-2016, 03:15 PM   #14
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We hit 1200 W yesterday flat mounted panels (1420 W rating). But we are at 20.47 N in Yucatan. We try to be where the sun is aka "Goldilockers" as I'm "not to hot and other to cold!".
harvesting 1200w out of 1420w at this time of the year is truly amazing, i could only dream about it

enjoy your stay in yucatan!!
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