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Old 02-20-2015, 04:34 PM   #1
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Added solar to Jayco 298 Eagle

After a year with our Jayco 298RLDS Eagle we loved it so much we decided to add solar to make it even more versatile when boondocking and keeping the batteries topped year round. Here are a few pics of the install. 2 Kyocera 135 w marinized panels and a Morningstar MPPT 45. Wiring was 4 gauge because I wanted to be able to add more panels in parallel and not worry about it. Parallel wiring helps reduce shading issues.
If you have any questions let me know. Hopefully this provides ideas for others thinking or planning on adding solar. The wiring was a pain in the (bleep). It runs down behind the front cap and then a recessed nook needed to be built to hold the controller. This is so it doesn't take up precious space in the TT storage bin.
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Old 02-20-2015, 05:16 PM   #2
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Hi Franknj,

It looks like the wire on the roof is not UV rated. You may want to place some split loom over that wire to slow the deterioration. I have seen wire like this flaking apart after a few years in the sun and weather.

Larry
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Old 02-20-2015, 05:50 PM   #3
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Thanks for the tip larry...I will.
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Old 02-21-2015, 10:05 AM   #4
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You did not mention if the 2 Kyocera 135 panels are 12v (17-22) or 24v (30-60). If 12v, there might be a problem with your Tristar MPPT and a parallel panel hookup. See: http://www.irv2.com/forums/f56/trist...ns-217925.html
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Old 02-21-2015, 11:00 AM   #5
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Quote:
Originally Posted by BendOR View Post
You did not mention if the 2 Kyocera 135 panels are 12v (17-22) or 24v (30-60). If 12v, there might be a problem with your Tristar MPPT and a parallel panel hookup. See: http://www.irv2.com/forums/f56/trist...ns-217925.html
Agree that 12v panels all in parallel with MPPT may be a problem. Their may not be enough voltage for MPPT to do its work. If they are higher voltage panels you are ok. The string tool on Morningstar's web site will answer the question about 12v, you can enter the panel parameters and it will warn if problem.

Since you wisely sized the controller for expansion, if a problem the easy correction is to add two more panels resulting in two series strings of two panels in parallel. I think you will find you want more wattage anyway. (-:
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Old 02-21-2015, 11:20 AM   #6
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The panels are 12V with an Vmpp of 17.7v. I have more panels I can put on but one thing at a time. I have this same setup and panels on our sailboat with a blue sky mppt controller and 5 AGM group 31s. This won't charge them all in a day but for that purpose we have a deep reserve for sailing long distance with electronics humming and no engine noise. While we swing at anchor they charge full. On this jayco TT I just put solar on only has 2 wet cell batteries. Haven't added a 3rd because space is precious. The batteries stay topped for now and charge back to full during the day so it accomplishes what I want at the moment. I usually dive into excess so I'm intentionally throttling back my ambitions.

I appreciate all the feedback. This forum has been incredibly helpful.
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Old 02-21-2015, 11:54 AM   #7
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" I usually dive into excess so I'm intentionally throttling back my ambitions."

Don't we all! Still does not mean we can't plan ahead and optimize what we have within time and money constraints.

Confirming your batts are getting fully charged:

https://handybobsolar.wordpress.com/...battery-power/
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Old 02-21-2015, 12:52 PM   #8
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I fully agree about planning ahead. I also have the same trimetric meter hamdybobsolar uses. Haven't hooked it up yet. Right now it's subzero weather so I'm not living in the tt so no major electrical draw. I do plan on checking battery voltage on a regular basis and also install the trimetric to get full power system details. I'll post details when I get them. Wish I was packing for a long camping trip but not just yet.
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Old 02-23-2015, 06:02 PM   #9
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Agree that 12v panels all in parallel with MPPT may be a problem. Their may not be enough voltage for MPPT to do its work....
There is plenty of voltage for MPPT. The Kyocera PV modules shown operate at 17.7 volts and 7.63 amps. Using the formula VMOD ų VBAT x IMOD means a MPPT controller will provide 22.50% boost for a low battery and 18.75% when the battery hits 14.4 volts. As the PV module heats up, the increase will be a little less.

Larry
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Old 02-23-2015, 09:26 PM   #10
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There is plenty of voltage for MPPT. The Kyocera PV modules shown operate at 17.7 volts and 7.63 amps. Using the formula VMOD ų VBAT x IMOD means a MPPT controller will provide 22.50% boost for a low battery and 18.75% when the battery hits 14.4 volts. As the PV module heats up, the increase will be a little less.

Larry
Thank You. This reflects my experience with my system. A 20 percent increase in amperage is most welcome.
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