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Old 09-25-2017, 05:54 PM   #1
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Brand: Thor Motor Coach
Model: Palazzo 36.3
State: Texas
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THOR #6728
2018 Palazzo Owners Ė is your solar charging your batteries?

Mine isnít. The controller always shows the moon symbol meaning itís not seeing sunlight and the voltage as read from the app and the controller shows .7v.

It looks like we have Grape Solar GS-PWM-40BT controllers coupled to a 100w panel on the roof. Iíve emailed Grape tech support and learned a few things. First, Iím getting about 19 to 20 v from the panel leads that come into the controller. I see battery voltage and power to the controller coming from the batteries. Iím having a hard time tracing from the controller to the battery bank, primarily because it gets lost in a bunch of wiring looms and is not directly connected to the batteries.

Has anyone else looked at this or noticed their charge controller always shows the panels not in direct sunlight? I would expect to be able to disconnect shore power and run my fridge via inverter and see some activity on the controller indicating itís trying to keep the batteries up.
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Old 10-03-2017, 12:26 AM   #2
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Well i replaced the controller and it still would not charge. I don't know enough about solar to troubleshoot it further. My dealer doesn't have a clue and a call to Thor did not yield results. It's just a bit frustrating.
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Old 10-15-2017, 07:58 PM   #3
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THOR #8959
Check the controller , if the moon is showing during the day, reverse the wires coming the panel on roof in the controller. I was concerned about doing that, putting a white ground in a "hot" port, however at the direction of Thor Customer service, I did just that and now it's working 100% with a Sun on the display during sunlight hours and moon at night. Could be wired backwards in China I guess because when I went to the roof, it appears Thor wired it correctly up to the panel.
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Old 10-16-2017, 12:09 AM   #4
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THOR #6728
I ended up doing the same thing and like you it now works. Now I need more solar!
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Old 10-16-2017, 12:31 AM   #5
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THOR #8959
Off-Grid Power-Kit Portable Solar Power Kit
Item #:712498 Model #: GS-100-EXP

Lowe's $165.00 per 100 W panel, or amazon, just make sure you get the brackets as well, waiting for mine to arrive !

Should be a plug and play install
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Old 10-16-2017, 03:57 AM   #6
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THOR #6728
Quote:
Originally Posted by rvanling View Post
Off-Grid Power-Kit Portable Solar Power Kit
Item #:712498 Model #: GS-100-EXP

Lowe's $165.00 per 100 W panel, or amazon, just make sure you get the brackets as well, waiting for mine to arrive !

Should be a plug and play install
How many are you adding? I'm trying to understand how many the controller will handle? I'm also considering an installer; holes in my roof worry me.
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Old 10-24-2017, 03:44 AM   #7
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Quote:
Originally Posted by lo-tek View Post
How many are you adding? I'm trying to understand how many the controller will handle? I'm also considering an installer; holes in my roof worry me.
I am told two additional, for a total of 3 100 w panels, producing up to 40 amps

I added one additional
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Old 10-24-2017, 04:02 AM   #8
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Quote:
Originally Posted by rvanling View Post
I am told two additional, for a total of 3 100 w panels, producing up to 40 amps

I added one additional
I emailed Grape and they told me I can add 4 more 100watt panels in series. Go figure.

I still need an installer.
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Old 10-04-2018, 08:32 PM   #9
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Does the panel charge the house or chasis batteries?

Mine was set to agm upon delivery

I have 4 house wet celll
And 2 agm chassis

I suppose it should be wet and not agm

Any thoughts?
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Old 10-04-2018, 09:49 PM   #10
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Old 10-04-2018, 10:33 PM   #11
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THOR #6728
Quote:
Originally Posted by heidorn39 View Post
Does the panel charge the house or chasis batteries?

Mine was set to agm upon delivery

I have 4 house wet celll
And 2 agm chassis

I suppose it should be wet and not agm

Any thoughts?
Welcome to irv2! I recognize you from the Facebook group

If the house batteries are flooded you controller should be set to flooded. A call to Thor could also confirm.
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