All Questions
Tagged with solar-energy dc
29 questions
0
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1
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55
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Off Grid Without Battery Inverter [closed]
Respected Members,
In My Country Pakistan hundreds of peoples selling off grid inverters that are working without battery. But I am not sure whether it is safe or not? because solar production is not ...
- 1
0
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0
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33
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Grid tie inverter 200 W with low voltage auto disconnect
I have a grid tie inver that produces at most any day 200 watts from my 12 V battery bank. I also have a adjustable auto low voltage disconnect circuit that disconnect the 12 V from inverter when ...
- 1
1
vote
1
answer
58
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Connecting a Pb battery back with a LiPo pack to combine maximum output power
I am working on my mountain cabin and am wiring it with some new electricity. In the long run, I want to switch to only LiPo based batteries but for now I still want to keep my old Pb batteries as a ...
- 51
82
votes
7
answers
69k
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Using clothesline steel core wire rope for AC and DC
As I am currently in a war zone, I don't have many options for cabling.
I found this clothesline (steel core plastic wire rope) that appears to be one mm of diameter (steel core diameter.) 13 meters ...
- 671
0
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2
answers
868
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Short-circuit rating in a photovoltaic DC combiner box
I am working on a large-scale, grid-connected solar power plant using DC combiner boxes and central inverters.
I am new to photovoltaics but I don't find enough information on DC short-circuit ...
- 183
2
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3
answers
77
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How to use a 49Voc solar panel for USB charging after a calamity (without using proper solar charge controllers)?
Some background first, actual question at the bottom:
Last year December my area in the Philippines was directly hit by a super typhoon, international name: Typhoon Rai.
For three weeks after that ...
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-1
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2
answers
392
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What size DC circuit breaker to buy for a 12 V, 80 W solar panel?
I have bought a 12 V, 80 W solar panel and before I start using it I want to install circuit breakers between the solar panel and the charge controller, the charge controller and the battery, and the ...
- 99
3
votes
2
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733
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Is it safe to connect DC equipment to a charging battery?
I have an off-grid house with a central 24 V setup of batteries and solar panels.
During the day, the voltage of those batteries changes quite a lot, based on power consumption and the solar panels' ...
- 131
0
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3
answers
2k
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Safety of a polarized DC breaker between the battery and the inverter
DC breakers use a magnet to blow the arc into the quenching channel. If the current is flowing in the wrong directly, the arc is pulled into the guts of the breaker and can cause the arc to be ...
- 101
0
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1
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144
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Safety check - Is this Amazon PV combiner box labeled wrong? 15A Vs 32A - 500V vs 1000V
I'm currently working on a solar circuit. I wanted to protect my internal systems from my panels in the event of a surge. I purchased a PV combiner box from Amazon - link to product.
It claims to be a ...
- 211
1
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0
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67
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Switching large batteries between 12 V and 48 V connections
I have four 200 Ah batteries that I am using to drive two separate really high current loads. The first load is 12 V at around 400 A and the second is 48 V at around 120 A.
I was wondering if I could ...
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-2
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3
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2k
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Benefits of having one 12V 200Ah battery vs six 2V 200Ah batteries connected together since you're getting the same energy output?
Why would one choose to have 6 batteries of 2 V 200 Ah connected together in a series connection instead of a single 12 V 200 Ah battery or the other way round?
From my calculations they all give you ...
- 3
0
votes
1
answer
290
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12V power point socket keeps burning out, apparently from power surge
I have a simple solar power setup:
40 watt panel with built-in charge controller (https://www.canadiantire.ca/en/pdp/coleman-40w-folding-solar-panel-0112043p.0112043.html)
12V marine battery (https://...
- 103
1
vote
0
answers
378
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Separating DC Cables and Communication Cables in the same trunking (Solar Installation)
There is an upcoming project which requires me to install the communication cables together with the DC cables for the PV modules. Each of the PV modules will have an additional communication device ...
1
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1
answer
1k
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How does the photovoltaic inverter synchronize with the grid?
My question is somewhat related to this one.
Most of the 3 phase inverters used for photovoktaic (PV) on grid installations can work only if there is AC voltage present. After the AC voltage ...
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