RV.Net Open Roads Forum: Tech Issues: Solar Learning Question, from a previous thread

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 > Solar Learning Question, from a previous thread

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pianotuna

Regina, SK, Canada

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Posted: 11/14/21 11:11pm Link  |  Quote  |  Print  |  Notify Moderator

OkieGene wrote:

I plan to install Solar in my new rig (Shopping now) and I also want to establish a 2nd and independent system for my Ham Radio operation. I want to be able to take my portable station out away from the rv and run it while operating ham radio, you guys who are hams will understand.

Later!


RFI can be a big curse. Both MPPT and PWM do pulse wave modulation. I suggest contacting the makers to find out what sort of numbers they may have. If battery power will do the deed--then switch off the input to the charge controller.

Don't switch the output side or you may end up with a poor doorstop.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, soon to have SiO2 batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Itinerant1

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Posted: 11/15/21 06:17am Link  |  Quote  |  Print  |  Notify Moderator

BFL13 wrote:

A few days like this in a row brings out the generator for us. Good to hear it never happens to anybody else! [emoticon] (That was in May up-Island )

">][image]


It happens to the best of us, if the generator is needed for a hold over charge so be it.

Spring to fall pretty easy going all the time without the generator living off the solar unless a couple days of heavy overcast skies.

The real test of the system comes from November to February living off of it, there can be some long stretches of psoc with morning soc lows at 25-30% while still using whatever in the 5th wheel. [emoticon]


12v 500ah (5,120Wh usable), 20 cells_ 4s5p (GBS LFMP battery system). 8 CTI 160 watt panels (1,280 watts)2s4p,Panels mounted flat. Magnum PT100 SCC, Magnum 3012 hybrid inverter, ME-ARC 50. Installed 4/2016 been on 24/7/365, daily 35-45% DOD 1,800+ cycles.

pianotuna

Regina, SK, Canada

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Posted: 11/15/21 08:09am Link  |  Quote  |  Print  |  Notify Moderator

What is psoc? Something state of charge?

CA Traveler

The Western States

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Posted: 11/15/21 08:39am Link  |  Quote  |  Print  |  Notify Moderator

OkieGene wrote:

I plan to install Solar in my new rig (Shopping now) and I also want to establish a 2nd and independent system for my Ham Radio operation. I want to be able to take my portable station out away from the rv and run it while operating ham radio, you guys who are hams will understand.
One option is to start learning now with a portable battery, solar panel and of course your radio. Battery in a case with voltmeter is common but step up to a battery monitor. Now you'll better understand that the RV system depends upon you to best supply the solar requirements. It's common for someone to start with a smaller system and keep expanding.

Install this battery monitor for $44 with a 350A shunt in the new rig to really understand your RV usage with some typical camping. https://www.amazon.com/AiLi-Battery-Moni........r-Voltmeter-Motorhome/dp/B07CTKYFTG?th=1

As a ham most likely you will quickly understand and focus what you need/want. As I posted a battery monitor was my first purchase for the RV. I've never regretted that and I jumped to 750W, serial connected panels, raised panels for better shade tolerance and MPPT controller. I definetly didn't want to follow many prior installs with 12V panels and PWM controllers.

73's W7BE Bob


2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland

Bob


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Posted: 11/15/21 08:46am Link  |  Quote  |  Print  |  Notify Moderator

As a heads up: If you buy a new RV then any modifications you make will very likely cause warranty coverage denial in that area if even remotely related. Think a roof leak on the opposite end of the panels for example.

So have a dealer install? They probably don't know how to spell solar but they will do it anyway and you may well have to fix what they did...

Just saying.

Itinerant1

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Posted: 11/15/21 08:46am Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

What is psoc? Something state of charge?


Partial state of charge. Not fully charged (100%) for long periods of time. Anywhere from 7 to 30+ days between fully charging the bank back up.

Uhm...maybe partial depth of discharges would of been better worded.

StirCrazy

Kamloops, BC, Canada

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Posted: 11/15/21 06:45pm Link  |  Quote  |  Print  |  Notify Moderator

BFL13 wrote:

"thats a case of a improperly set up system"

So if the weatherman adds more days in a row like that, it's your fault for not having anticipated him by adding more panels. Got it! [emoticon]


no, but it does mean you havent set up your battery capacity to deal with more than two days of bad weather. more panels would help you recover faster when the flooding goes down... hope you are all safe down there.

I had just moved from Colwood to here when I bought my 5th wheel so my trailer I traded in was already set up for a week of island winter camping and I didnt have solar, so all batteries. when I bought the 5th wheel I just transfered that over and added solar.

Steve


2014 F350 6.7 Platinum
2016 Cougar 330RBK

pianotuna

Regina, SK, Canada

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Posted: 11/15/21 07:00pm Link  |  Quote  |  Print  |  Notify Moderator

Hi Itinerant1,

Thanks for the clarification.

EMD360

Arvada, CO

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Posted: 11/17/21 07:41am Link  |  Quote  |  Print  |  Notify Moderator

I recently added the whole upgrade system to our new to us RV. I learned the most from an older explanation online and there are several links to it from other pages. jackdanmayer.com
I described and as always got great input here. Solar install so far
I was looking for the diagram I used and clicked on images in my Google search and realized that search made it easier to find several how-to pages. I am usually not willing to sit through a video if I can find a written how-to. Maybe just me.
I searched for rv solar combiner box and to get just diagrams: “rv solar controller isolation diagram”.
I also write a blog although it is mostly about energy efficient remodeling of my house. RV Solar Install
And I bought the system from Northern Arizona Sun and Wind But I only used the major components and purchased the wiring components from Amazon and I already had some of them.
Even if it’s more expensive to add a solar system than you will ever return in actual electricity gained I have never read of anyone who regretted the install. I had an RV for 10 years and just used a small solar panel and usually boondocked. So it’s a luxury installation in many ways.
Hope this treatise helps you!


2018 Minnie Winnie 25b New to us 3/2021
Former Rental Owners Club #137
2003 Itasca Spirit 22e 2009-2021


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