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

Replacements for Solarex MSX-60

I have MSX-60 panels that are 19.75" wide and 43.63" tall.  Does anyone know of a direct replacement for these?&n...
Steve Homan 1

reduced panel output

After a recent move I was reinstalling my small off grid system that provides power to a small workshop.  I found that one ...
Robert Williams 1

Real world question

I have a question about Charge Controllers and how much they can handle. I am in a position where I have increased my panel outp...
Charles Harte 2

Raising PV panels above trees

My location in the woods creates problems for getting sunlight to PV panels.  I'm looking for advice on how best to ge...
Jerry Wenzel 2

Question about battery capacity when wired in series vs. parallel

Hello, I have 4 150 amp hour batteries. When wired in parallel, this would give me 600 amp hours at 12 volts. ...
Robert Kovalik 2

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

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

Please critique my system

I would like to power 8 LED lights, 15 watts each. could someone please critique my system and tell me if the wiring is correct?...
Nick van Dijk 1

parallel solar off grid inverter with diesel generator

Dear Sir I have a 250 kva diesel generator 380v 3 phase supplying power to residential area for 10 hours a day due to utilit...
Shaman Abla 0

parallel shunt charge controllers

what type of combiner box or ? do I need in order to run (2) ASC shunt controllers to the same battery bank?  Help please&#...
James Johnson 0

parallel different types of panles is o.k.?

when hooking up multiple types of panels. IE: different Voc / Nominal. It's o.k. to mix them when they are all in Parallel?...
James Johnson 4

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

Old Cut sheets/spec sheets

I 'm a solar installer in Tucson and i'm looking for cut/spec sheets for Evergreen DC-110 Modules,  Any info will...
Mike Eisele 1

Off grid different than on grid for location

  I would like to know what people think on where to mount the panels. example- on a grid system you would always point the...
James Anspaugh 4

Next to zero gains at high noon

Hello- I bought the setup for our off grid cabin and it worked great from the day we installed (last November) until about a mon...
Jessica Sullivan 2

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

newbie, here! had an oddly low state of charge

Hello, folks, Im new here.Let me give a complex rundown of my system first. pv panels: 6 =100 watt renogy monocrystalyne pan...
Adam Meredith 18

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

Need Solar Charge Controller Recommendation- 12v system, 2x240 watt (Vmpp 30.4v)

I've got two REC 240PE(BLK)  240 watt solar panels, and I'm wanting to find the least expensive (but not junk) charge...
Eric Randall 1

Need help with RV charging system

I keep my RV in a building without any power.  I'd like to build a solar system that would consist of a single panel (...
William Brackman 5

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