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01-25-2020, 08:20 AM
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#1
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Junior Member
Jayco Owners Club
Join Date: May 2018
Location: Long Island
Posts: 20
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Victron 100/30 Max Panels
Thinking of using the Victron 100/30 with bluetooth. Also thinking of pairing with Renogy 100W panels. How many do you think I could use with the Victron. What combination of series/parallel would be the most effective. Majority of time is spent boondocking for work at isolated locations. Currently have 2 Battleborns. 1100W inverter. Most of the time I am in the Northeast. Tilting is not really an option I want to include,
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2018 Jayco Precept 31UL. Toad: 1993 Jeep Wrangler
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01-25-2020, 08:28 AM
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#2
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Senior Member
Solo Rvers Club iRV2 No Limits Club
Join Date: Feb 2011
Location: Yuma County, AZ
Posts: 10,868
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Renology panels are way over priced. I bought used panels recently for 15 cents per watt. Sorry I can’t help you with the Victron. I only use Morningstar charge controllers and Trimetric battery monitors.
I get my solar advice from this guy https://handybobsolar.wordpress.com
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Barb (RVM18) with Morkies Lily & Bebe RIP Sena FMCA#F466348
"Homer" ‘11 Shasta Cynara, pulling "Ranger" '97 Ford Ranger toad
The Journey is Our Destination. Full-timer May 2011 - July 2021
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01-25-2020, 09:31 AM
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#3
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Senior Member
Join Date: Jul 2018
Posts: 2,812
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Roughly 7 amps per 100 watts, so 400 watts. Input can up to 100 volts. so any series or parallel combination below that. Higher voltages mean smaller wires. Look on craigslist for panel deals.
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Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
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01-25-2020, 09:53 AM
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#4
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Senior Member
Winnebago Owners Club
Join Date: Sep 2009
Location: Spring Branch, TX
Posts: 2,981
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I have 3-100w panels and the Victron 100/30 controller. Wired in parallel I figure I’m limited to 400w but in reality could probably have 500w and never see over 30 amps.
I’ve looked at various series wiring options and while the higher voltage may be more efficient for the controller that doesn’t change the amperage limits on the device.
My RV came with one 100w Zamp panel so when I added the two new panels I went with Renergy. They have been good panels and cost 1/3 as much as Zamp panels would have cost at the time. If I add a 4th panel, which I think I may do, I’ll probably go with a Renergy again.
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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01-25-2020, 10:32 AM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,349
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Victron datasheet states 440 watts input @ 12 volts.
Input watts over 440 will be cut. Seems a waist to have more the the max.
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01-25-2020, 10:33 AM
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#6
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Junior Member
Jayco Owners Club
Join Date: May 2018
Location: Long Island
Posts: 20
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Quote:
Originally Posted by jcussen
Roughly 7 amps per 100 watts, so 400 watts. Input can up to 100 volts. so any series or parallel combination below that. Higher voltages mean smaller wires. Look on craigslist for panel deals.
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If I run in series, and increase the volts doesn't that change the 7 amp per 100 watt calculation?
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2018 Jayco Precept 31UL. Toad: 1993 Jeep Wrangler
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01-25-2020, 11:10 AM
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#7
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Member
National RV Owners Club
Join Date: May 2016
Posts: 47
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Quote:
Originally Posted by Oventek
If I run in series, and increase the volts doesn't that change the 7 amp per 100 watt calculation?
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If you connected all of the panels in series the voltage would be added together and the current would remain the same as it is for 1 panel.
I have the Victron 100/30 and 4 Renogy 100 watt 12 volt panels you are looking at. Victron recommends connecting the panels in series/parallel to get a 24 volt input to the controller to maximize its efficiency in the early and later hours of the day.
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2006 National RV Tradewinds 40C, 8.9 liter Cummins ISL
2011 Jeep Liberty Towed
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01-25-2020, 11:15 AM
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#8
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Senior Member
Join Date: Jul 2018
Posts: 2,812
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Quote:
Originally Posted by Oventek
If I run in series, and increase the volts doesn't that change the 7 amp per 100 watt calculation?
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If you increase the voltage by running in series, the amperage will stay the same. Watts are volts X amps, so if you increase the volts by running in series, amperage will not change. 100 watts is 100 watts no matter what voltage it is.
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Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
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01-25-2020, 11:19 AM
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#9
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Junior Member
Jayco Owners Club
Join Date: May 2018
Location: Long Island
Posts: 20
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So I am still limited to 4 panels whether I go 12 or 24V?
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2018 Jayco Precept 31UL. Toad: 1993 Jeep Wrangler
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01-25-2020, 11:32 AM
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#10
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Senior Member
Join Date: Jul 2014
Posts: 35,349
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You are limited to 440 watts if your connecting the controller output to a 12 volt battery system.
Its not the panel voltage, its the battery system voltage that dictates the 440 watt input.
If you want to create a 24 volt battery system, you can then feed 880 watts to it.
Problem with a 24 volt system is running all of the 12 volt stuff.
Have you shopped for 2, 220 watt panels ?
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01-25-2020, 11:34 AM
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#11
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Senior Member
Join Date: Jul 2018
Posts: 2,812
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Quote:
Originally Posted by Oventek
So I am still limited to 4 panels whether I go 12 or 24V?
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You are limited to 400 watts, could be four 100 watt panels, two 200 watt panels, or one 400 watt panel. In many cases, bigger panels cost less per watt.
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Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
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01-25-2020, 11:59 AM
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#12
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Senior Member
Join Date: Dec 2019
Location: America's Seaplane City.
Posts: 1,163
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Quote:
Originally Posted by twinboat
You are limited to 440 watts if your connecting the controller output to a 12 volt battery system.
Its not the panel voltage, its the battery system voltage that dictates the 440 watt input.
If you want to create a 24 volt battery system, you can then feed 880 watts to it.
Problem with a 24 volt system is running all of the 12 volt stuff.
Have you shopped for 2, 220 watt panels ?
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The solar charge controller will step down the voltage if it's too high, i.e. series system. The MPPT controllers can accept up to 100 volts or more(check the data sheet) and still provide the proper voltage on the out put for charging the batteries.
Check the specs on the controller for ratings, I believe going to 24v will double the watts available will still having the same amperage input. Again, check the specs of the controller.
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1998 Safari Trek 2480, 7.4 Vortec, 118k miles
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Mid Flowriduh
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01-25-2020, 12:21 PM
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#13
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Senior Member
Winnebago Owners Club
Join Date: Sep 2009
Location: Spring Branch, TX
Posts: 2,981
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Connecting 4-100w panels in two series/parallel strings will double the voltage and double the amperage. There are some good and bad effects to doing this.
First it allows thinner gauge wiring and second the MPPT controller is more efficient at higher voltages. That’s the good.
But a pair of panels wired in series will put out zero current if one of the panels is partially blocked. In parallel wiring one blocked panel only effects the blocked panel.
So it’s a mixed bag no matter how you look at it.
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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01-25-2020, 12:30 PM
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#14
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Senior Member
Join Date: Jul 2018
Posts: 2,812
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All modern panels have bypass diodes that will effectively shunt the current around any shaded area. My home system runs 240 volts to the solar controller, in series/parallel. Shading will drop voltage a bit, but still produces voltage and current from the unshaded cells.
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Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
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