Solar

Van Living Forum

Help Support Van Living Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Extremely over priced.  It does not even include batteries. 

The community can design a system for you, and I can help you instal it for something to do. 

I do have a little experience.  ;)

This will give you an idea of what is out there. You can also call them for a full kit.

https://www.renogy.com/products/kits/rv-marine/

Then there is Northern Arizona Wind and Sun. Bob recommends them highly for complete systems.

https://www.solar-electric.com/marine-rv.html

Again I can help, or there are others in the tribe that will be glad to work on it.
 
I will check others, I was just drawn to the installed part. I do thank you for the input. Rob.
 
yeah a system like that with batteries should be about half that price. installation is easier than it may seem.
 
bardo said:
yeah a system like that with batteries should be about half that price. installation is easier than it may seem.

Labor rates at some of these places approaches or even exceeds $100 per hour . . .
 
For 280W...not a chance in hell.

Renogy's 400W whole system plus batteries would be half that for almost twice the capacity. Sure, the install would be a little bit of work but there seem to be a lot of people around here to help. It's the system I'm going with.
 
Gunny, I can completely understand why you want somebody to do the install for you.  Just understand that many of the places doing this stuff really don't know what they are doing and don't get it 100% right.

Since you have some time, I would recommend you check out the various articles on Handy Bob's web site.  He rants and raves a lot, and probably should be called Angry Bob, but after you read his articles, you'll understand WHY.  I happen to agree with him completely.

https://handybobsolar.wordpress.com/
 
Another worthwhile site to study is the one by Jack Mayer.  He and Handy Bob know each other and are in about 95% agreement.  (Jack recommends MPPT controllers and Handy Bob does NOT).

While neither Jack nor Bob are any longer in the business of doing installs themselves, Jack DOES recommend several installers that he thinks get it right.  If I were going to pay someone else to do my solar, I would pick only from his recommended list.  That way I would feel confident it was done right.

http://www.jackdanmayer.com/rv_electrical_and_solar.htm
 
Thanks, John. I read one page and can see your point, but I like blunt folks. Thanks for the lead.

Rob
 
I spent a week or more trying to take in all the info on handybobs site. Putting up with his rants is well worth it for the information you get out of it.
 
I'm in the Jack camp with MPPT but read Bob anyway.
 
Handybobs rant's are a good read filled with good info.

The short version is.

Use thick copper between panel and controller. Use shorter thicker wire between controller and battery

Do not believe that Float= full.

Full is determined with a Hydrometer, not a voltmeter
Full is determined by how many amps the batteries can accept at the proper absorption voltage
Float should be triggered only when the batteries are full.

Most solar controllers, unless programmed properly, if they can be programmed at all, will not hold absorption votlage for long enough.

Not holding absorption voltage long enough is like drinking lard when downing your cheeseburger and the fact that one has not yet had a heart attack, somehow indicates that the practice is not harmful.

Float does NOT equal full.
 
Sternwake, what controller do you recommend?
 
I was looking into buying one of those 100 watt Renogy kits that GotSmart posted , it seemed I
would have to buy a mppt controller separate unless I wanted to use the one that came in the kit.
 
I know nothing about them except what I've read here and I don't want to have a system that won't last. I don't have the money to redo things. I'm going to find a parking spot next to Sternwake and write everything down. Just kidding Sternwake, I won't stalk you.


Rob.
 
That's actually a good idea but he will probably tell you here and save you the gas.
 
Gunny, I am sorry.
I have not kept up with solar controller offerings, nor their features to make a recommendation.

Generally speaking I would be OK with any PWM or MPPT controller that allowed a programable absorption and float voltage. The absorption voltage durations might be programmed by a time limit, or when amps required to maintain absorption voltage drops below a set threshold.

i have a Bluesky SB2512i. The addition of their IPN pro remote allows me to change these variables.

The IPN pro remote is also an Amp hour counting battery monitor.

It has been in continuous use since october of 2007.

It can not handle 24 volt nominal panels, and it lacks the battery temperature sensor of the SB2512ix model.

Whether the price of these programmable controllers with battery monitor is worth it to you really depends on the time it takes for the return on investment. How long that takes depends on how hard/ how long you use the batteries.
It can be taken to ridiculous degrees.

Often much easier and cheaper to simply shoose lesser batteries and replace them more often.

My issue is simply with non programmable sontrollers dropping to float voltage prematurely and the user then thinking the batteries are full when they are not.

it is one thing is the sunlight available could not achieve full, it is another when there is the sunlight available and the controller drops to a float voltage prematurely and causes the batteries to sulfate and lose capacity, when the potential was there to actually reach full charge, if the controller would simply allow absorption voltag to be held long enough.
 
Gunny said:
I know nothing about them except what I've read here and I don't want to have a system that won't last. I don't have the money to redo things. I'm going to find a parking spot next to Sternwake and write everything down. Just kidding Sternwake, I won't stalk you.


Rob.

If you park next to SternWake just have him run you a 12 volt cord , LOL
You know he's got plenty of power.
 
Do any of them do the charging automatically? Without input from me or do I need to have the controller set for a specific type of Battery? Does the controller detect I guess is what I am asking. I am thinking less expensive batteries, I figure I'll fry the first ones somehow.

Rob
 
Rob, basically no.

Achieving ideal requires a human to vary the variables and a solar controller which allows one to vary those variables.

If the batteries are only lightly cycled infrequently, it becomes much less important.

When deeply cycled every day it becomes more important.

Achieving ideal is not paramount, unless one wants to really maximize the amount of cycles from their batteries.

it is not as if unideal will yield 25 cycles when Ideal could be 1000.

It is more like marginal can achieve 150 deep cycles and Ideal would be perhaps 1000.

My electrical related posts on this forum will always outline what would be Ideal, for maximum battery longevity, and trying to keep misinformation from becoming repeated, or incorrect assumptions to proliferate, or to counter act the 'works just fine for me (so far, No idea really) will work just fine for you too'.

Say Achieving Ideal might cost 1000$ in parts and a hundred hours of labor over that maximum battery lifespan
When achieving good enough costs 250 $ in parts at 2 hours of labor( simply replacing the batteries)
it would take a long time, if ever for that ideal system to pay off, unless the goal is bragging rights.

And lets face it, bragging rights are usually Lies. i mean afterall My van is so special and so highly tuned, i can get 50MPG at 100 Mph, and the exhaust smells like roses. They sing songs in the hills about my magical proclivities and accomplishments, and I am hung like a porn star and my ability to employ oneupmanship has no upper limit and i always win, and get what I want when i want.

Reality is so sad in comparison.

Reality is that when I sit in front of this laptop for as much as I currrently do, My solar and alternator( lack of driving) cannot meet my power requirements. I can and Do plug into the grid, and am currently attempting to extend the Time my 3+ year old 450+ deep cycle battery lasts, by rarely cycling it deeply and keeping it full. Perhaps once a week. My plug in charger can achieve ideal, but requires that I spin a voltage dial at the proper time. (The Horror!)

If I were actively travelling, I would not be on the laptop much at all, and would have no issues returning battery to full, and in fact have power surplus, and in summer usually do have a surplus even not driving much and not plugged in.

I would like another 100 watts on my roof, but there is not room to add another 100.

But all my charging sources have variable voltage. Solar, Alternator and grid powered charger can all be influenced to do my wishes, allowing me to extract maximum value from top quality lead acid batteries.
 

Latest posts

Top