myersfamilyhome
New Member
- Joined
- Feb 9, 2021
- Messages
- 140
Can someone help me understand how to determine if a fuse/breaker is needed for 1-9, how to determine the size of the fuse/breaker, and if possible explain why at that location
Understandings (please correct me if I'm wrong):
* DC (Direct Current) power flows in a loop.
* Because DC requires a loop (complete circuit) to function, there must be a common positive and negative connection to complete the flow of electrons.
* When power is being generated by DC equipment the flow of power is pushed out the positive line and returns (completes the loop) through the negative line.
* When power is being consumed by DC equipment the power is pulled in through the positive line and returns (completes the loop) through the negative line.
* Using river analogy, voltage is speed of river flow, current/amps is the width of river, and resistance is riverbed water is in contact with. With this in mind the length of a river(wire), will lose speed of water flow(voltage drop) simply due to resistance, and the width of river (wire size) determines the amount of water (amperage) at any point in the river that can pass through. If the river isn't wide enough (wire gauge) and the amount of water (amps) is greater than capacity, the water will overflow creating resistance/friction (heat).
* A Series Connection (connecting negative of one power source to the positive of another like power source). This adds the amperage output of all in series while maintaining the lowest voltage produced from the series.
* A Parallel Connection (connecting positive power lines together and negative power lines together of common power sources). This adds the voltage output of all in parallel while maintaining the lowest amperage produced from parallel.
* Parallel and Series and be combined to get wanted output as long as wire can handle current (amps) and have common voltage.
* Breakers/Fuses are used only on positive lines. This allows the fuse/breaker to protect the wire/circuit/equipment that a fault/surge could damage before it gets that far.
Basic Solar Model:
Sun ? - (lol had to add this)
PV - (Solar Panels)
PV Series Wiring - (PV- to PV+)
[1. Fuse/Breaker(s)? - Between Panels]
PV Parallel Wiring - (PV+/- to Combiner)
[2. Fuse/Breaker(s)? - Leaving Panels]
Combiner - (1,2,3,4to1 or Combiner Box)
[3. Fuse/Breaker(s)? - Leaving Combiner]
Charge Controller (Convert PV Power to Common Battery Voltage Power)
[4. Fuse/Breaker(s)? - Leaving Charge Controller]
Bus Bar - (+Distribution of CC Power)
[5. Fuse/Breaker(s)? - Leaving Bus Bar to Inverter]
[6. Fuse/Breaker(s)? - Leaving Bus Bar to Converter]
Converter - (Converts CC/Battery Power to Different DC Power)
[7. Fuse/Breaker(s)? - Leaving Converter to Circuits]
[8. Fuse/Breaker(s)? - Leaving Bus Bar to BMS]
BMS - (Manages Battery Bank)
[9. Fuse/Breaker(s)? - Leaving BMS to Each Battery/Cell]
Thanks to everyone for help
Understandings (please correct me if I'm wrong):
* DC (Direct Current) power flows in a loop.
* Because DC requires a loop (complete circuit) to function, there must be a common positive and negative connection to complete the flow of electrons.
* When power is being generated by DC equipment the flow of power is pushed out the positive line and returns (completes the loop) through the negative line.
* When power is being consumed by DC equipment the power is pulled in through the positive line and returns (completes the loop) through the negative line.
* Using river analogy, voltage is speed of river flow, current/amps is the width of river, and resistance is riverbed water is in contact with. With this in mind the length of a river(wire), will lose speed of water flow(voltage drop) simply due to resistance, and the width of river (wire size) determines the amount of water (amperage) at any point in the river that can pass through. If the river isn't wide enough (wire gauge) and the amount of water (amps) is greater than capacity, the water will overflow creating resistance/friction (heat).
* A Series Connection (connecting negative of one power source to the positive of another like power source). This adds the amperage output of all in series while maintaining the lowest voltage produced from the series.
* A Parallel Connection (connecting positive power lines together and negative power lines together of common power sources). This adds the voltage output of all in parallel while maintaining the lowest amperage produced from parallel.
* Parallel and Series and be combined to get wanted output as long as wire can handle current (amps) and have common voltage.
* Breakers/Fuses are used only on positive lines. This allows the fuse/breaker to protect the wire/circuit/equipment that a fault/surge could damage before it gets that far.
Basic Solar Model:
Sun ? - (lol had to add this)
PV - (Solar Panels)
PV Series Wiring - (PV- to PV+)
[1. Fuse/Breaker(s)? - Between Panels]
PV Parallel Wiring - (PV+/- to Combiner)
[2. Fuse/Breaker(s)? - Leaving Panels]
Combiner - (1,2,3,4to1 or Combiner Box)
[3. Fuse/Breaker(s)? - Leaving Combiner]
Charge Controller (Convert PV Power to Common Battery Voltage Power)
[4. Fuse/Breaker(s)? - Leaving Charge Controller]
Bus Bar - (+Distribution of CC Power)
[5. Fuse/Breaker(s)? - Leaving Bus Bar to Inverter]
[6. Fuse/Breaker(s)? - Leaving Bus Bar to Converter]
Converter - (Converts CC/Battery Power to Different DC Power)
[7. Fuse/Breaker(s)? - Leaving Converter to Circuits]
[8. Fuse/Breaker(s)? - Leaving Bus Bar to BMS]
BMS - (Manages Battery Bank)
[9. Fuse/Breaker(s)? - Leaving BMS to Each Battery/Cell]
Thanks to everyone for help