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2
votes
2answers
77 views

What is required to connect solar panels to my home without connecting to the grid?

My household has a base power consumption of approx. 200W-300W. I am considering if it was possible to get a reasonably sized solar panel to cover its needs when the sun is up, with a seamless ...
0
votes
2answers
75 views

Pre-Romex AC circuits to DC for offgrid Solar

We live in a rural 250 year old colonial that was wired for ceiling and wall sconce electric lights sometime in the mid-1940s. In the early 70's outlets were added, then updated to Romex when a ...
1
vote
1answer
73 views

What are the consequences of incorrect positioning of air separator (and swapped return/flow) in solar heating system?

I've moved into a house that has a Vaillant Solar system for helping heat the water. We had various issues that resulted in a Vaillant engineer visiting, who pointed out various problems, including a ...
0
votes
1answer
200 views

Home made powered foundation vents? Computer fans and solar power?

So I have a bit of a moisture issue in my crawl space. I've considered closing up the crawl space completely but I think that sounds like to much work and this idea below sounds more fun. I was going ...
-1
votes
1answer
59 views

Why is the answering machine making noise with a photovoltaic system connected to the house?

The answering machine is making noise and there is a photovoltaic system connected to the house. What can cause this?
1
vote
1answer
82 views

How can I calculate the number of solar panels required to power a specific load? [closed]

I recently purchased a home in Maricopa AZ. With that said, I'd like for it to be most efficient. It has a forced air system for heat and cooling. I don't know the size of the cooling unit. How does ...
1
vote
1answer
653 views

How can i set up a Solar Panel to charge a 12v DC car battery and power a Raspberry Pi?

I've pulled together a few spare parts that i've had laying about for ages now and I finally have a bit of time to try do something with them. I've got a solar panel which puts out ~22vDC @ ~2Amps ...
2
votes
2answers
58 views

What factors should I experiment with to improve the performance of a DIY solar hot water system?

Background: Late in the summer last year I finally commissioned a DIY solar hot water pre-heat project. Very simple, drain back, open (vented) tank, PEX coil for a heat exchanger, PEX plumbing ...
8
votes
3answers
418 views

What's a reasonable expectation for efficiency in modern solar panels?

I recently had a solar array installed on my roof with four different sections connected to three inverters - the total array includes 56 panels for a total of 13.44 kW. However, I'm not seeing ...
13
votes
6answers
14k views

How should I go about installing a 12 volt DC residential circuit?

I have a couple deep cycle batteries that trickle charge from a solar panel, for emergency use. Right now the only way I get useful power from them is to use a 12VDC -> 120VAC inverter, e.g. the type ...
4
votes
2answers
188 views

What hardware do I need for selling the electricity generated by solar panels to the electric company?

I understand that solar panels generate low DC voltage, and public power lines require high AC voltage. I am also aware of the device called Power Inverter which converts DC power with low voltage to ...
0
votes
1answer
90 views

Are solar panel films for windows ready for the end users?

I read about a new solar-panel technology, based on a photo-sensible film, which may be applied directly on to glass. This will definitely help in the versatility and in the ease of installation.. ...
2
votes
2answers
782 views

Using a solar system with a condensing boiler for the central heating instead of tap-water?

According to the manual of my AWB ThermoMaster 2HR 28.02WT Condensing boiler, it is compatible with a pre-heating solar system for tap-water only. It even has extra facilities to ensure that the ...
7
votes
3answers
124 views

How do you protect solar panels for storage during house rebuild?

I am in the process of preparing to demolish my house so I can rebuild. We are taking the solar panels off the roof and plan to put them back on to the new house. Does anyone know the best way to ...
4
votes
2answers
237 views

What Good and Affordable Alternative Power Source Would You Recommend?

I am woking on a startup (read: using my computer always). 80% of the time, I generate my own electricity with a petrol/gas generator. On new years day, the Nigerian government increased the price of ...
7
votes
2answers
20k views

Can I power my air conditioning with solar energy?

In my house I have 3 small air conditioning systems running at 8000 BTU/hour each. I would like to power them with solar energy. I found that I would have to generate: 3.41 BTU/hr = 1 Watt 8000 ...
4
votes
1answer
147 views

Is it possible - setting thermostat based on a seperate thermometer

I'm looking into building a solar water heater, but I'm wondering, is it possible (and what products should I be looking for) to turn on a pump when the water in the solar heating device is hotter ...
2
votes
1answer
512 views

Solar powered charger for laptop

How do I build a solar powered charger for a laptop with dc rating 19v, 3.42A? I'd also prefer to use some other batteries to store the electricity? How can I accomplish this?
3
votes
1answer
1k views

Does the specific gravity of a lead-acid battery indicate degradation?

Let say I have a battery that is a few years old. When it was new, the specific gravity was indicating 1.265 when full, and it lasted fairly long. If I do an equalization charge, for the same ...
2
votes
1answer
282 views

Fuse replacement in Xantrex solar charge controller

I have a Xantrex XW-MPPT60-150 solar charge controller. The moment came where I need to replace the fuse that protects the charger. The problem is that I need to replace it with Littlefuse KLKD 1 ...
3
votes
2answers
900 views

What are some tips for deep cycle battery maintenance for an offgrid solar system?

I have an off grid solar system, with an 240AH 24v deep cycle battery, and the system (and all of the components in it) is a year and a half old. i have several questions and i hope that some one ...
3
votes
2answers
150 views

Solar panel: Current-related question

I found a solar panel rated 9v, 70mA. I want to use it to create a power backup for a 9v, 1A router. Is this possible?
3
votes
3answers
714 views

Solar power backup for router

I want to use solar panels to create a power backup for a router(9V, 1A). I'm aware I'll require solar panels and batteries but am not sure how to choose suitable ones. Please help suggest me on ...
14
votes
4answers
9k views

How do you protect solar panels from hail?

Saw another question on solar panels and it reminded me of one big thing that always made me hesitant to consider them. We get several hail storms each year and having an expensive glass covered(?) ...
58
votes
14answers
4k views

Are solar panels cost-effective?

Environmental issues aside, I'd like to know whether solar panels are worth it from a monetary standpoint? How long before payoff occurs? Pros & Cons? Is technology moving too fast, e.g. should ...