Questions tagged [solar-panels]

For questions about photovoltaic panels or photovoltaic-based solar power systems.

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94 views

What is the optimal number of solar panels for my house?

Just had a solar power tech stop by. With the orientation of our house and the solar load, our property (house + workshop) can support roughly 41 panels. Each panel provides 370 W (max)...which ...
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2answers
102 views

How I can find out what size solar panels I will need in order to power a single air conditioner?

I am thinking to buy an air conditioner, but I want to power it using solar power in order to avoid increasing my personal CO2 emissions. I am thinking to buy a small 9000BTU one and for personal ...
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1answer
69 views

What are the process and considerations to get off-grid using solar panels? [closed]

Can anyone tell me what type of solar panel is considered the best for generation of power and price? I already have 3.5 KW of Solar PV on my roof which I benefit from the UK Feed In Tariff. Now I ...
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1answer
61 views

Anything forward-thinking things to do regarding solar panels when putting a new roof on?

If you were putting a new roof on now on a shed or garage, and solar panels were a real possibility in the next two or three years (for lights and light-duty electric tools), what things, if any, ...
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2answers
149 views

Can I have net-metering with an ATS between utility and batteries and diverse power inputs (solar, wind, generator) behind the batteries?

I would like to participate in net-metering until I have a solar array large enough to disconnect from the grid entirely. However, for various reasons, I am going to have an undersized solar array ...
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2answers
103 views

Are there drawbacks to using solar panels as a roof without asphalt shingles underneath?

If you're working with a new construction or a very old roof in need of full replacement, why not forego asphalt shingles altogether when installing solar panels on the roof? It seems like a waste to ...
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5answers
556 views

Could I conceivably use power from my neighbors (hypothetical) solar panels in the event of a blackout?

I know some people have solar panels and produce excess power that they then sell back to the grid. Since they generate some amount of power that they could sell back to the grid. So hypothetically, ...
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4answers
209 views

Solar panels: converter has AC Voltage out of range

Since about six months our house has solar panels. There's a converter (4600 W) with two inputs hooked up to 6 and 7 solar panels respectively of 325 watt peak performance. Overall this setup runs ...
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1answer
57 views

Need help buying the right sized off-grid solar system

I'm planning on using solar power to supply electricity to a 12x24' building. This building will be located near our main house, but will have no connections to the house, electrical or otherwise. It ...
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1answer
52 views

Determine highest "carbon reduced per dollar spent" option for reducing pollution generated by home?

I've been talking with friends and coworkers about how I can reduce the amount of pollution generated by my house (heating the air, heating the water, cooking the food, etc.) Everybody has a ...
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0answers
48 views

"Non-Retail" House Battery

I need a ~3.5kw battery to power an emergency circuit if the power goes down. I've been quoted $13,000 to add an LG Chem 9kw to our existing system but that does not include the inverter upgrade. ...
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1answer
76 views

My Idea to get off grid while still in my neighborhood [closed]

How can we live somewhat off the grid without having to dig a well? . Solar Energy System for the house gets you off the power grid reliance and can actually get you paid for providing energy to the ...
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2answers
81 views

Can I connect a normal 12 Volt 150AH C10 battery with a solar 12 volt 150AH C20 battery in series for my 24Volt solar system

I have an Exide invamaster 1500imst short tubeler normal battery of 12 volt, 150AH, C10. Now I want to connect this battery with a solar battery of 12 volt, 150AH, C20. Can I connect this normal 12 ...
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2answers
778 views

Lights start flickering on Luminous inverter when I connect my Desktop CPU

I am using luminous solar nxg 1100 solar inverter. At my home, I have 4 fans, one tv, 10 led lights, 3 laptops and a desktop. All the equipments work fine when there is main supply. If there is no ...
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36 views

Charging a battery bank with Solar Cells

So essentially bought one of these "solar battery banks" for a weather station project i am working on. Long story short the power output for the built in cell is awful. Now the question is,...
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1answer
59 views

Solar electric home

I want to see if my house can go completely solar. It's a small house with 240v 100A of electricity so about 24kW. I'm still new to this whole solar panel subject, this is my first time utilizing it ...
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1answer
39 views

Solar array and inverter troubles

I have a solar array on my rv and have installed a power bright 6000-12 inverter which I wired the rv supply line directly into the lugs on the front panel. I am having a problem with the inverter ...
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1answer
132 views

What is a "solar-ready" air conditioner?

I've been looking into having solar panels installed. My understanding is that the solar panels connect to a breaker in the breaker panel, and so you have both the main breaker (from the power ...
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3answers
439 views

How much solar can I get, and when/why would it require digging up the street?

I recently got a couple of estimates for getting solar panels installed on our roof. (I am in Southern California.) The first installer recommended that we get 8kW of solar, and he said it would be ...
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2answers
175 views

Spark/Arc observing while connecting battery to charge controller [closed]

I have the solar system as shown in below diagram. When I connect my battery terminals to the MPPT charge controller, I am observing an arc immediately and due to which I am afraid to connect. Does ...
3
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3answers
2k views

How to identify electrical panel busbar rating

recently I got a bid from a solar company and they said I don't need to upgrade my eletrical box since it is rated at 125 amps, and for that value, I can install a 7k system based on calculation here ...
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1answer
57 views

Spacing between solar arrays

I'm considering a solar farm in my backyard so I'm doing my initial research. Found this video. Here's a still from that video: What's the point of that 12' gap between the arrays? Seems like a waste ...
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2answers
468 views

One meter (200A service) feeding two main electric panels 100A ea, is it legal?

In preparation for a grid tied PV solar installation, we noticed that we have two breaker panels 100A ea fed by one meter. See picture. In the past the house was two units two meters, but it was rehab ...
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1answer
54 views

Solar panel installation on a old vintage roof

We are in a 106 year old home with an old vintage roof. My wife believes that the old roof with vintage wood is precious and that the holes that are to be drilled in to the wood (especially the sturdy ...
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3answers
131 views

Are there power transfer switches with various and diverse input types?

If you have solar, you might get a manual transfer switch between utility and solar. Both of those would be hard wired. So let's say you had solar and utility power AND a generator ... I see there ...
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2answers
50 views

What specs to look for in solar panels to know it can power a product?

I wish to run a pond pump (such as this here) off of solar electricity, because the electricity in my area is very expensive, but clouds are rare. For this example, it is listed as running on 199 ...
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2answers
102 views

Solar system with both grid tie-in and backup power without battery? [duplicate]

My wife and I have been talking for a few years now about getting some solar panels installed on our roof. We even went so far as to have a sales rep for an installer come out and talk through our ...
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3answers
2k views

Adding critical-loads sub-panel with a PV install, rationale and ampacity calculation

I'm considering adding a critical-loads subpanel near my main load center, in conjunction with a small grid-tie solar system, and with connection for backup power. Please critique my rationale for ...
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2answers
73 views

Does it matter on which phase the solar panel inverter is connected?

We have a three phase power supply (3x25A) at our home in The Netherlands (230V). All three phases are used for an induction cooker, and in parallel, two phases (let's call them 1 and 2) each power ...
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57 views

Diagnosing Solar Inverter

The goal is to correctly diagnose from the device's fault codes and determine corrective action. A SB6000U Sunny Boy inverter returns energy into the electric grid: reducing the electric bill ...
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0answers
37 views

Workshop subpanel with possible solar backfeed

Needing to run power from the residence to the workshop. the need is 220v for the welder in addition to overhead lighting, the run is 375'....what wire and conduit size is needed? If in the future, ...
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2answers
107 views

Can I install electric equipment on carpeting?

I am starting to build a 600-watt solar panel system. I have a small workshop, that used to be an office. I am planning to install it there. I plan to install backups, a charge controller in an ...
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3answers
611 views

Is it normal to see moisture inside my solar panels?

They are installed about 10 inches above my sheet metal roof. The solar panels are Monocrystallin.
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2answers
94 views

Will it damage my batteries?

I have two solar arrays which totals close to 2 kw that I use to charge a 24 v 450 amps flooded lead-acid battery bank using 2 mppt charge controller of 30 and 40 amps. Will it damage the battery by ...
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1answer
73 views

Solar panel setup with battery

The electricity where I live is pretty expensive at about almost 30 cents a KWh, so I'm considering setting up a solar system. I got 3 100 Watt Polycrystalline solar panels a while ago, pretty cheap. ...
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1answer
307 views

Proper amount of solar panels needed to charge batteries

I am working on a plan for a 24V electrical system. Based on my needs I plan to have six 12V 100Ah LiFePO4 batteries wired up (2S3P I believe) to give me 24V 300Ah. Assuming I need to fully recharge ...
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1answer
653 views

Solar AC Disconnect - Fused or UnFused?

I'm installing a solar panel system with microinverters on each panel. An AC disconnect must be installed outside. I've learned that AC disconnects can be fused or unfused. - the unfused variety ...
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2answers
3k views

AC Disconnect Ampacity - can fuse size be something other than 30 or 60 Amp?

I am currently hunting for an AC disconnect to sit between my main service panel and the AC power that will be supplied by my solar panel microinverters. Nearly every AC Disconnect I find online is ...
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2answers
305 views

Solar 240 VAC source and load wires sharing a conduit

I'm planning on installing a new electric oven and solar panels on my house soon. Given the location of everything relative to my electrical service panel, both the panels and the oven will need to ...
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1answer
86 views

LED security light adding a switch

I have this LED solar security light. Now I want to put this in the back of a shipping container and I want to have a switch all the way in the front of the shipping container. I have no previous ...
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1answer
1k views

Determining Bus-Bar Rating for PV Installation

I already have a primary PV inverter connected up through a 40A breaker. I'm looking to expand by adding a second PV inverter. To comply with the 2014 NEC 705.12(D)(2) rule I need to know the panel ...
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4answers
526 views

Sizing up a battery bank for max continuous power draw

EDIT: on hold while I check conditions @Harper pointed to the fact that my battery is rated to draw 165A continuously for an hour, which should cover the needs of my inverter when my vacuum starts up....
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1answer
76 views

Will my roof framing support an array of flat solar panels?

I want to install 23 305w panels on my roof. It's a flat roof constructed with 2x8 beams spaced at 24". There is no snow load to consider and we get occasional wind and rain storms a few times per ...
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1answer
342 views

How should I connect my solar panels to each controller for optimal performance (series or parallel) without buying new charge controller?

I have four 355W solar panels and three 315W solar panels. I have a 40-amp mppt and a 30-amp mppt charge controller with 100V Max PV voltage. The distance solar panels to charge controllers is around ...
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1answer
131 views

My contractor wants to install a different brand of solar panel from what was approved in their permit

I am having solar panels installed on my house. My contractor told me that they are installing 20 Canadian Solar CS3k-325-MS panels. I just got a copy of the plants they sent to the city for their ...
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2answers
157 views

Storing comsumable dry goods in your car in the summer? [closed]

I live in South Florida where the summer sun has no mercy. I drive a new van and I've taken steps to keep the inside cooler during the day. I live in the van for weeks at a time and need to store ...
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2answers
106 views

DIY Solar Panel Install

I have a house under construction, and the electricians have installed a 1" conduit from the attic to the main panel. I have also gotten 5 quotes to install a Solar PV system around 9kW. I can ...
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2answers
89 views

Calculating daily energy production of PV panels

From https://www.solarpowerrocks.com/solar-basics/how-much-electricity-does-a-solar-panel-produce/ it says: "Using the example above of a 250-watt STC rated panel, if you multiply the 250 watts the ...
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4answers
482 views

Why do I need batteries to use solar when the grid is down?

I am considering a home solar photovoltaic installation, probably 5 kW or so. The usual configuration around here is with a grid-tie inverter and net metering. But when the grid goes down, the ...
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2answers
94 views

How to calculate wattage used in a solar panel set-up

I want to run an electronic that uses 300 watts @ 5-10 amps via solar panel's on my rv. I've got (2) 6 volt batteries set up in a series so it is 12 volts. Here are the stats for one battery (so I ...