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Old 07-03-2019, 12:43 AM   #11
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Default Re: Electrical diagram review

Originally Posted by dwighttttt View Post
Why 50 amps? The peak draw of the fuse block is 100A.

Fuses and breakers are used to protect all aspects of the system, wire, components, etc.

The 4 awg wire needs to be protected and 50 amps is a good target for that size.

Unlike AC transformers, typically in DC the losses are fairly high, so the components are used at less than their capacity. The only reason I suggested as large as 50 amps is to supply the 600 watt inverter, otherwise 20 amps is enough and potentially you could again use 10 awg wire unless the wire runs are long.
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Old 07-03-2019, 02:10 AM   #12
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Default Re: Electrical diagram review

Originally Posted by OrioN View Post
Unless the OP is running a workstation notebook with say a modelling/render program plus a discreet GPU at full speed, he will never see it consume 15A dc (inverter load). Surfing and netflix are in the range of 2-3A dc.
Up until yesterday i'd fully agree with you ... but yesterday i almost burned my arm as i rested on my whimpy I5-bearing laptop's adapter ... and the adapter was **hot** (and rated at 1.5 amps).
I had a couple of NASA animations playing (i.e. "just web browsing"), but something sure got it toasty (the laptop's fan had come on full-tilt, too, so that supports a "cpu being busy" model)

Today it's not anywhere near that warm.
I do the former on a slightly aged 2.8 GHz (3.45 Boosted) machine and peek at ~14A dc full out....
I was too preoccupied to chase down the hardware for measuring what was going on...

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