Technical Discussion: Solar Electric System - Photovoltaic

Share your questions and experience with others on off-grid and grid-tie solar electric systems. Our own NABCEP PV Certified installers also frequent this forum to lend a hand.

topics

Subject Started by Replies

specific PV module / charge controller question

I have in mind to use Sanyo 32v PV modules, in series strings of 3, running through a C40 controller, set to 48v to charge a bat...
Travis M 4

'hard shading' causing panel failure?

I have had a 3kw grid tied system on my house for 8 years. Two parallel strings of 9 panels on either side of a dormer to a Sunn...
James J 7

Amount of PV panels seems high for proposed battery backup?

Hey all, So following the mess that all the storms hitting the North East have made of the power grid these last few months,...
Mike Chizhov 1

Benefits of nuclear energy

Why choose nuclear energy: Nuclear energy when harnessed properly can be used as an efficient source of energy to generate e...
Robert Mathew 6

outcome of voltage in series and amp/h

 I'd like to know the result  connecting  batteries with different voltage(V) and different currents(AH) in series L...
Kay Andy 5

PWM or MPPT for a Uni-Solar thin film with Vmp=16.2V ?

Hi, I want to build a 12V system with thin film flexible panels, which have Vmp=16.2V. It will be installed in an area havin...
Gabriel Cravchik 1

Should I wire solar panels in series or parallel?

So if I have 2 identical KD135SX-UPU panels (17.7v Max Power, 22.1v Open Circuit) and I’m charging a 12v battery bank (4 @ 6v,...
John Kozell 5

Battery Charging/Sizing Solar System (new to solar)

Hi all, I just got my first solar system all setup.  I bought a used 110 watt Mitsubishi solar panel and a morning sta...
Travis A 10

xantrex MPPT 60-150 wrong connected

Hi, I have a problem with my Xantrex MPPT charge controller.   I set the charge controller with two panels and four...
Joost Wilterdink 0

Equalize Charge Using Direct Panel to Battery Connection

I decided that I wanted to equalize my battery today.  After doing some research about what voltage to do it at I decided t...
Travis A 1

Morningstar 10 amp charge controller overcharging?

I have been watching my voltages closely and I think my charge controller may be overcharging my battery.  I am seeing a vo...
Travis A 3

nabcep bogus certification hurts installers and solar

After seeing so many employers and customers requiring nabcep certification I just felt that I once again had to show how bogus ...
Tom M 0

48v battery bank charged by 12 v panel controller

hey Everyone, obvious Newbie here. I have 4 Kyocera 400 w panel system, still in the box. I also have 4 Deka 92AH 12v AG...
Peter Bige 2

Xantrex/Trace C40 and Morningstar TS45 charge controllers

Good day to you all..... I'm stuck between these two controllers. Cost wise it looks like Xantrex might be a better...
Scott K- 4

pv system for 500 square foot cabin.

Hello, I have a small remote (off grid for now, the telephone company just installed poles and strung wires) hunting ca...
Frank Erdmann 3

NEWBIE: Is a generator compatable with off grid solar

Hi there, Newbie question (and I suspect many more to come) Northern Minnesota location. I have a 100...
Terry LaValle 6

Xantrex C35

I have a question for anyone that has a C series controller? Does anyone use this controller in diversion mode with both solar A...
Max Schulte 7

New to solar, starting with a BP SX170B 24v panel...what next?

I recently acquired a BP SX170B PV panel and would love to build a stand-alone system for our camping vehicle.  170 watts is a ...
Ann Guentert 4

Did I architect this right ?

I am new to altE and am very pleased with the site and the education available. I will be purchasing a new solar system and...
Peter Emmel 6

Calculation Confirmation of the Solar Panel Power in the DC Lighting System

Dears, Here is: Off Grid Sunshine Duration: 4hr per day System: 24V DC, 48W Operating hr = 10 hr &#...
Eric Lee 5

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