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Old 01-21-2015, 05:53 PM   #29
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The DC vs AC is shock hazard goes back to the fight between Edison and Tesla over power distribution. Either one can kill you. Voltage kills as that is what overcomes the resistance so the current can flow. Any source with over 0.1 amp capacity can kill you. How much over is moot.

If you ever watch an old technician they reach into wiring systems with the back of their fingers so that any shock will curl their fingers away from the source. It's our version of old pilots vs bold pilots. ;-)

High voltage servo motors are used some places because the current requirements are much lower hence everything else in they system is cheaper. That is what has me thinking that for things like solar it makes more sense to run panels in series and feed high voltage low current to the battery bay converter. The charge controller end is very similar inside the box.

Once one gets to storage it always comes down to pick your chemistry and then start connecting cells. Pick a power and then wire the cells as needed to store it at whatever voltage the system is set up for. The single cell voltage is set by the chemistry. I thought about advocating for higher voltages in storage but it really does not matter in terms of cell count. Given the ubiquity of 12 VDC based equipment it just makes sense to stay there. If I was running a big inverter system I might think otherwise. ;-)
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Old 01-21-2015, 08:57 PM   #30
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Home systems have either single inverter running with panels in series or micro inverter panels with an inverter on each panel.

Both have advantages but the single inverter setup whuch is what is described here has major weak point of being in series resulting in total current limited to the least single panel...do shade hits one they all drop.
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