Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
 

Go Back   Thor Forums > Thor Tech Forums > Modifications and Updates
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 10-10-2018, 10:04 PM   #1
Senior Member
 
Brand: Thor Motor Coach
Model: Four Winds
State: Ontario
Posts: 265
THOR #9081
Solar and Inverter Installed on a Four Winds 31E.

I have been meaning to document this for awhile and finally got around to it. Here is my install.
During the winter, I frequent the beautiful Southwest of the USA. I do quite a bit of boon docking there. Last summer I installed Solar , an Inverter , and a battery monitor. Last winter I added a third 100 amp/hour battery. This is my second solar and inverter install on a RV.

For the solar panel to controller, I used the 10 gauge cable which the RV came pre-wired with from the factory. The cable from the roof entry point, terminated under the rearmost dinette seat with a enough to route it through the existing cable entry into the the compartment below the dinette. In the front most part of the compartment, is where I mounted the inverter, 15 amp auto transfer switch, solar controller, and battery shunt. This compartment is next to the entry door where the batteries are under the step. I drilled holes in the rear and battery side of the compartment then used PG11 waterproof cable glands to pass all wires into and out of the compartment. Upon completion I then sprayed with foam, for further waterproofing. From the main AC Panel, I rerouted the general receptacle circuit to the auto transfer switch in the compartment. From the auto transfer switch output, I routed romex back to the first general circuit receptacle. The second input of the transfer switch is the Inverters output. Connections to the transfer switch are done in metallic junction boxes on the roof of the compartment. I installed the battery shunt behind the solar controller. The shunt and solar controller monitor cables along with an inverter on/off cable were then routed back into the RV, under the shower, behind the bathroom sink, into the wall behind the medicine cabinet then into the wall behind the control panel for the RV. I then mounted a single pole switch along with the solar controller and battery monitors in the control panel.

I purchased residential solar panels thus went with an MPPT solar controller. I purchased a 8 ft piece of 2X2 angle aluminum. Cut it to make mounting brackets for the panels, and then used the left over to mount the controller. I used -20 Blind well nuts and all stainless steel hardware to mount the panel brackets on the roof, and used screws when the bracket was over the satellite backer EGS(electro-galvanized sheet metal). After drilling the inch hole for the well nut applied self leveling dicor around the hole, then inserted the well nut and bolted the bracket to the roof. I applied dicor after, all around the bracket edges. The well nuts hold the large 65 X 40 inch panels very well. The brackets also allow for air flow under the panels. I have no plans to climb on the roof or position the RV to tilt the panels, thus did not use any tilting mechanism.
Although not needed when you combine only 2 panels in parallel I used 15 amp in line fuse holders and fuses in the wiring from the panels, as a means of disconnect on the roof and future addition of a panel if needed. According to the schematics from Thor , I added up the factory pre-wire runs and it was 33.5 feet. This would mean a 4.5 % voltage drop over the run. It has not been an issue as the controller normally sees over 30 volts. Had I hooked the panels in series, then the voltage drop would be in the 1% range.
The inverter, solar controller, and battery monitor I chose were Victron Energy products. Victron is the equipment you would find in high end yachts, which are similar to our RVs *smile*. The 15 amp transfer switch is Xantrex. The inverter model I chose is no longer available. It is the predecessor to the current model that comes with a VE Direct port. As I had no intentions to monitor the inverter over blue tooth, I choose the older model, at a better price and it also came hardwired with the battery cables. These items I purchased on line from Bay Marine Supply in San Diego. From them I also ordered custom crimped and finished battery marine cables with specified lugs and shrink tubing to the color, gauges and length I required. This is a business that I highly recommend, a very easy straightforward transaction. The Solar panels I sourced locally and paid 85 cents a watt.

I attached the electrical and solar documentation . Hope this helps others.
Attached Thumbnails
Click image for larger version

Name:	Clipboard03.jpg
Views:	174
Size:	203.6 KB
ID:	13411   Click image for larger version

Name:	Clipboard04.jpg
Views:	176
Size:	130.7 KB
ID:	13412  

Click image for larger version

Name:	Clipboard05.jpg
Views:	138
Size:	65.6 KB
ID:	13413  
Attached Files
File Type: pdf SOLAR1.pdf (54.1 KB, 78 views)
File Type: pdf ELECTRICAL1.pdf (48.5 KB, 72 views)

__________________
_____________________
2018 Four Winds 31Y
Peterrrr is offline   Reply With Quote
Old 10-10-2018, 10:10 PM   #2
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 21,473
THOR #8860
Brilliant!

__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
Bob Denman is offline   Reply With Quote
Old 10-11-2018, 08:39 PM   #3
Senior Member
 
Long & Winding road's Avatar
 
Brand: Thor Motor Coach
Model: 2017 Axis 25.4
State: Arkansas
Posts: 2,653
THOR #12231
Thats a nice setup. Thanks for sharing. Solar is on my list for next year.
__________________
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
Long & Winding road is offline   Reply With Quote
Old 02-15-2021, 06:01 PM   #4
Member
 
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 69
THOR #20784
Great documentation, planning and execution. I have 2020 31Y and hope to install larger system shortly. Have 4 AGM batteries and 3000 watt Go Power inverter. Will look later today for controller, down wiring and roof connectors.

I do have one question, Do you have or know the roof rafter spacing for your unit?
__________________
Fullabunk is offline   Reply With Quote
Old 02-15-2021, 07:04 PM   #5
Member
 
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 69
THOR #20784
Solar for 4 winds 31Y 2020

I just went to my unit and find nothing on the roof or under the rear bench. I guess mine in not prewired.

I am thinking of 600-800 watts, non flex solar panels.

A 60a MPPT Charge Controller,12V Max Input 100V 1560W

As stated previously I have 4 AGM batteries at 92 AH and a 3000k Go Power converter.

Likely will increase battery bank.

Any ideas or suggestions.
__________________
Fullabunk is offline   Reply With Quote
Old 02-15-2021, 07:34 PM   #6
Senior Member
 
Brand: Thor Motor Coach
Model: Four Winds
State: Ontario
Posts: 265
THOR #9081
Not sure if you are aware, but you can get all the schematics for your unit from Thor.* The majority of them are available at their web site, (*https://www.thormotorcoach.com/owner-login/ * *) I do not believe the roof schematics are there though.* I phoned Thor gave them my number and they gladly sent me a 5 page diagram for the roof.* If you get them you can see why I went with installing the panels with well nuts.*
Good to see that your from Texas. I always enjoy visiting Texas. I have boon docked at Magnolia Beach south of Port Lavaca.* Nice spot to watch the boats.
Good idea on the AGM batteries.* I have lead acid and the compartment under the steps is very tight and hard to get three batteries in.* I had to add a Flow Rite system to add water.
Enjoy your 31Y. I enjoy mine.
__________________
_____________________
2018 Four Winds 31Y
Peterrrr is offline   Reply With Quote
Old 02-15-2021, 07:41 PM   #7
Senior Member
 
Brand: Thor Motor Coach
Model: Four Winds
State: Ontario
Posts: 265
THOR #9081
Do a search on solar entry gland and you will see what they have installed on the roof. If you get the Chassis Harness Schematic it will tell you the color of wire to look for under the bench.
__________________
_____________________
2018 Four Winds 31Y
Peterrrr is offline   Reply With Quote
Old 02-15-2021, 07:41 PM   #8
Member
 
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 69
THOR #20784
Thanks. I was able to fit, in the battery compartment under the steps, 4 AGM batteries from Sam's. They are size 27. It was a tight fit and I had to relocate the 2 large breakers to the outside rear of the battery compartment. Plenty of battery cable to do that. Now breakers are easier to locate and reset if necessary and battery compartment if full.
__________________
Fullabunk is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 01:33 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2