Questions tagged [solar-panels]

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

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Grid tie solar breaker calculation for sub panel with single breaker main panel

My old house is wired as follows: A 100A service to a meter and main panel on the outside of the garage. Main panel has a single 100A breaker. A 125A rated sub panel inside the garage with house load ...
0 votes
4 answers
92 views

What battery type is most suitable to power a shed across temperature range -10C to +40C?

So I am gathering information on what I need to bring together to create a solar powered LED based lighting system for my shed. I need a battery, a charger controller for the battery, solar panel and ...
1 vote
0 answers
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Sizing wire (calculating ampacity) for solar PV arrays

I have a solar photovoltaic array consisting of 9 PV modules interconnected in 3s-3p. They are the Jinko Solar JKM450M-60HL4-V panels. I want to know which size of wire I need to choose for the common/...
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0 votes
4 answers
81 views

Water Heating and Photovoltaic Energy

I installed 5.5kW photovoltaic solar plant and I have a gas instantaneous heater for hot water. During the day, I have an excess of energy production and I would like to use it to heat water. However, ...
-1 votes
2 answers
81 views

how to charge marine battery at my wall [closed]

i have all kinds of batteries in my house. when my xbox controller is out of battery, i charge it from my wall. when my phone is out of battery, i also plug it into the wall. i'd like to get a ...
1 vote
1 answer
76 views

Why does my 12 V, 500 Ah solar battery bank drop to 60% as soon as 4000 W inverter turns on pulling 2100 W?

I have five Inerstate DCM0100 wired up to give 12 V, 500 Ah. I have a Renogy 40A MPPT Rover Charge Controller. I have a Jarxioke 4000 watt inverter I purchased today. Precursor this knowing that I ...
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0 votes
1 answer
79 views

Calculating wire size for solar array

How can I calculate wire size to go from a solar array (of 36 panels, 365W & 42V each) to a shed with an inverter 50 ft away?
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2 votes
2 answers
133 views

How can I achieve blackout resilience on a grid-connected solar installation?

I recently installed a 3.6kw solar panel setup at home. I added an inverter and a 3.6kw battery. When I asked if that would work on case of a blackout the installer told me it won't - backfeed ...
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0 votes
1 answer
65 views

How to estimate solar production on my roof, considering shade from trees

I am considering solar panels, and I have some trees in the neighbor's yard immediately to the south of my house. What's a relatively accurate way to estimate annual electrical production from a given ...
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2 votes
2 answers
143 views

Residential Solar Stopped Working

I've had my solar panels for a couple years now without issue. Installer is not in biz anymore and not answering calls, texts or emails. July 3rd mid-day it all stopped producing power. APSystems ...
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0 votes
2 answers
94 views

Solar panels in rental - power plug

When living in a rental, if solar panels are hooked up in the traditional way they become part of the property, and have to be left behind when leaving the rental. When placing solar panels, how could ...
1 vote
1 answer
343 views

How big of a solar panel is needed to run a 300 watt water pump?

I have a water pump in a pond that is rated as using 300 watts. I'm not concerned if it shuts off at night. Overcast days are super rare. I don't plan on installing batteries, just want to connect the ...
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-1 votes
1 answer
150 views

Where would a transformer be installed for a Tesup wind turbine? [closed]

2 months ago I ordered the New Tesup 5k Wind Turbine, and the Matching Charge Controller along with a Delta 5k Grid Tie inverter. I received and installed it 8 weeks ago. I've previously worked as ...
0 votes
0 answers
104 views

Trying to improve and expand "professional" solar installation

Several years ago I contracted a local firm to install 56 solar panels on my roof. I know they used a licensed electrician and the utility company approved and installed my Net Meter but the system ...
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0 votes
1 answer
68 views

Changing a roofline for solar? [closed]

Our 1950's built mid-century modern home faces roughly south, which is great for solar panels. However, thanks to its super cute low slope roof, with gables and hips galore, and lots of vents and ...
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2 votes
3 answers
129 views

Am I on single-phase or 2-phase power?

Our power meter has two "branches" - one for ground floor and one for upper floor, and on the bill we've got 2 readings, again one for each floor. Also from the street we've got 2 mains ...
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5 votes
2 answers
460 views

Like for Like Main Panel Replacement (PG&E)

I'm located in the bay area - PG&E territory. I have a Federal Pacific panel that needs to be replaced but it is within 3 feet of a gas line. My wires are underground so it'd require trenchwork ...
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0 votes
0 answers
87 views

Attempting to size grid tie solar system for 70 -80 kwh per day

Want to go grid tie mainly . (With a small back up I have already separate system ) I use less than 15kwh per day all summer max 70 kWh winter day. I can't build it all at once cost wise. I know the ...
1 vote
0 answers
53 views

Can I have 100A main breaker with 100A main panel for solar panel?

I have an inverter with 21A output current. And will existing 100A main busbar with existing 100A center fed main breaker? I was looking online and there are articles about NEC rules for center fed ...
1 vote
1 answer
104 views

Is there any downside I need to know when I add new solar panels to existing ones?

I currently have about 12 LG solar panels installed on my roof. They only produce about 3kwh at peak sunlight condition even though they are nominally a 4kwh system. It is because of my house's ...
2 votes
2 answers
559 views

how can a generator inlet peacefully co-exist with grid-connected solar?

I have a small grid-connected solar PV system. If it is connected to my main load center via a two-pole breaker, how can I safely add a generator inlet to this system ? The usual method is to ...
3 votes
1 answer
215 views

What is the best layout of s240u solar panels to heat a pool with limited width?

I have 6 SunHeater S120U panels as suggested for my pool size according to the Installation and Operation Manual using a ground install. However, I am limited to 10 feet of width, which with ...
2 votes
0 answers
113 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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1 vote
2 answers
118 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 ...
-1 votes
1 answer
78 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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0 votes
1 answer
66 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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1 vote
2 answers
426 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 ...
0 votes
2 answers
142 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 ...
2 votes
5 answers
2k 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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1 vote
4 answers
814 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 ...
1 vote
1 answer
86 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 ...
2 votes
1 answer
59 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 ...
2 votes
0 answers
60 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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-3 votes
1 answer
85 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 ...
1 vote
2 answers
766 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 ...
0 votes
2 answers
2k 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 ...
0 votes
0 answers
41 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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-2 votes
1 answer
80 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 ...
-1 votes
1 answer
41 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 ...
3 votes
1 answer
183 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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3 votes
3 answers
2k 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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0 votes
2 answers
407 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 votes
3 answers
7k 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 ...
1 vote
1 answer
87 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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3 votes
2 answers
951 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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0 votes
1 answer
71 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 ...
1 vote
3 answers
304 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 ...
0 votes
2 answers
56 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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1 vote
2 answers
146 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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6 votes
3 answers
3k 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 ...