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

SMK or MC4

Hello, I'm finalizing the configuration of a new system (my first) and have a few questions regarding the connectors an...
Lion Benjamins 5

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

small off-grid: solar charge controller + inverter compatibility for LVD purpos?

Hi, Our non-profit helps train about, and install, renewable energy systems in remote villages in developing countries. ...
Michel Maupoux 5

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

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

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

Charge Controller for Kaneka 60W 48v Thinfilm Solar Panel

I have a off grid cabin with 4 golf cart batteries powering a 12VDC to 120VAC Xantrex 2kW inverter.  The main load is CF li...
Jerry Wenzel 5

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

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

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

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

Battery not charging - defective charger or depleted battery?

Hello I have a small solar panel I use to charge a battery to power a water pump. -30W solar panel -Morningstar...
Leonardo Chen 4

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

Array wiring

Question I have 12 Canadian solar 255 watt panels. Is it better for me to series fewer panels to increase amps, or more panels t...
Charles Harte 3

ad hoc starter kit for greenhouse

sunlinq 62w p3 panel system with the xantrex 1500 rolling battery (with AltE recommended accessories) ~$1400 does t...
Lyn Ciampa 3

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

Should I use a mppt500 or mppt500hv ?

I am building a small off grid system using two 230 watt panels. They are 34 volts open 8 amps each, BP 3230T. I can wire th...
Lj Gwen 3

looking to set up for off grid living.

I would like to start setting up a cabin for off grid living and was wondering if there was anyone that could give some pointers...
Shannon Alley 3

Extremely Long Run Solar Calculation

Hello Everyone! I have a small off-grid, low-amp (3-10) environment cabin, running 12v lights and charging cell phones ...
Jeff King 3

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

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