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Old 07-27-2015, 06:57 PM   #29
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Here are the images.









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Old 07-27-2015, 11:41 PM   #30
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Ray,

What were the conditions that gave you the 5.5 amp charge into your batteries? were you in bulk charging phase? What time of day was it?

I have reasons for these questions, which I will provide once I know the parameters under which the photo was taken.

Thanks!
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Old 07-28-2015, 08:53 AM   #31
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Hi Lew,

The picture was in the late afternoon and overcast and yes, it was in bulk charge mode. In full sunlight I've seen the reading as high as 10 amp with bulk charge. I've also noticed it as low as 1 amp with little to no sunlight. The charge controller appears to do a great job regulating the amps needed to keep the battery at or near 100% the entire time. On our last trip this past weekend we had the refrigerator on the entire time, along with the pump, lights, stereo, we also charged a iPhone, etc... The lowest that I saw the IPN battery monitor go to was 91%, but by 9am the next morning we were back up at 100%. We still have room on our roof for one more panel if needed, but at this point I don't see that we need it. Everything seems to be running and charging as planned.

Ray
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Old 07-28-2015, 04:16 PM   #32
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I usually see 21 or more amps from my setup on sunny days.
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Old 07-28-2015, 06:35 PM   #33
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I'm super jealous, with the two flexible panels that I have I think the max is about 11 or 12 amps total. What is your setup on 27'?

Ray
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Old 07-28-2015, 08:56 PM   #34
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Now THIS is POWER!!!!
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Old 07-28-2015, 09:06 PM   #35
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Ray,

Your charge is being limited by several factors that are apparent from your photo:

there is shading on the panel in the foreground from the fan cover. This is a big voltage killer
there is a dust/dirt covering on the panels. Keep them really clean if you want maximum output to your Blue Sky controller
the solar cells are getting only a portion of the available solar radiance due to the materials used in their construction. Look carefully at the reflections of the roof A/C and fan cover on the panels' surface. Reflected light means lower solar radiance hitting the cells, which translates directly into lower panel output. YOu never see this type of reflection in a hard panel, as very low glare glass is used.

I have posted before that I have seen a 30-35% drop in the overall output from the system I have on the roof of my Sprinter service van. With hard panels, I would see 32-25 amps into the batteries on a regular basis.

After replacing them with Photo-Flex thin film panels (Grape Solar), the maximum I see is around 24 amps. That is a HUGE difference directly measured in the same system! Luckily, I have also replaced my Lifeline GPL-6CT AGM batteries with a 200 amp/hour lithium pack, which charge very quickly, so the decreased solar output from the thin film panels don't really effect my system.

The lower panel output is one of the reasons why I do not use the thin film panels on my installations.
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Old 07-28-2015, 10:09 PM   #36
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Lew,

Now you are just showing off! LOL

Ray
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Old 07-28-2015, 10:50 PM   #37
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Quote:
Originally Posted by RaymondFitz View Post
Lew,

Now you are just showing off! LOL

Ray
Nah!!!

Actually, that was from a HUGE solar array on a Winnebago 36' motor home with 1920 watts of solar (12 X 160 watt panels) and 3-40 amp Blue Sky solar charge controllers in parallel. He still has room to expand the system!!!!
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