There are no forum members that confuse A and AH.

[thomm225]

Originally Posted by team karst

ICE. An acronym for learning that current leads voltage with capacitive loads.
ELI. for the converse. Voltage leads current with inductive loads. Vector math is used to get the value of the lead or lag.

Better known as ELI the ICE Man!

Just Like the Sine, Cosine, Tangent remembering tool(s).

Old Hippopotumas Alice had 0 apples.

Oscar had a hairy old Ass.

Sine= O/H

Cosine= A/H

Tangent= O/A

[team karst]

Good ole military acronyms. I suppose the R color code is next. [emoji15]

[Baronkrak]

Originally Posted by thomm225

Sine= O/H

Cosine= A/H

Tangent= O/A

So long one remember that: O stand for Opposite, A for Adjacent and H for Hypotenuse.

[sailingharry]

Originally Posted by Baronkrak

?????

Which part didn't you understand? Basic power factor fundamentals.

The opposite end from resistive would be a pure inductive load or a pure capacitive load. Instead of a phase angle of zero, they would have a phase angle of 90 and a PF of zero. Curiously, you would have massive currents and zero power.

Inverters are rated in VA and not W because of this. V is essentially fixed at 110, and so for practical purposes they are really rated in A. If you connect an inverter to a pure capacitive load, you will highly stress all of the current parts of the machine while drawing almost no DC and producing no Watts.

But this is super basic stuff (in the world of power, ac, dc, and associated engineering principles). Either you have no idea about PF, which applies to probably 95% of the world, or you are simply trolling. If you are in the former category, I am happy to help you learn. Otherwise, I give up.

[Baronkrak]

Originally Posted by sailingharry

Resistive or inductive loads can skew the angles.

Resistive, really ?

Originally Posted by sailingharry

Basic power factor fundamentals.

And how does “Basic power factor fundamentals" applies to Direct Current circuitry ?

[sailingharry]

Originally Posted by Baronkrak

Resistive, really ?



And how does “Basic power factor fundamentals" applies to Direct Current circuitry ?

Yes, I mis-spoke. Capacitive and inductive. As stated many times before, PF for pure resistive loads is 1.00



But how it applies to Direct Current? Since there is no rotation, there is no angle, and there is no phase difference -- and since the cosine of zero is 1, the pf in direct current is 1.


But you've done it to me again. Trolling, clearly.

[kmacdonald]

Originally Posted by s/v Jedi

If you don’t have a battery monitor then I bet you don’t have an inverter, all propane powered, 100W solar at best and Duracell or Costco marine dual purpose batteries, right? If so then it doesn’t matter, you just go until it doesn’t and then you go to Autozone or Costco for new ones.

Now wait a minute. I used to use Duracell 6V deep cycle batteries from Sams Club. They were great batteries. They were 6 years old and going strong when I sold the boat they were in. I took the BVM 700 with me. I only had 40 W of solar though but that was plenty.

[s/v Jedi]

Originally Posted by kmacdonald

Now wait a minute. I used to use Duracell 6V deep cycle batteries from Sams Club. They were great batteries. They were 6 years old and going strong when I sold the boat they were in. I took the BVM 700 with me. I only had 40 W of solar though but that was plenty.

That’s what I wrote: everything is fine and when it’s not, you get new ones

The point is that all my recommendations are geared towards expedition cruising. Areas where there is no Sams Club or anything really. All you get is what you bring.

[kmacdonald]

Originally Posted by s/v Jedi

That’s what I wrote: everything is fine and when it’s not, you get new ones

The point is that all my recommendations are geared towards expedition cruising. Areas where there is no Sams Club or anything really. All you get is what you bring.

And tried and true lead acid might be a good choice for that scenario. They don't fail catastrophically and are readily available everywhere. I have had LiFePO4 batteries on my boat for three plus years and think they are great. I've also seen a lot of "professionally" installed and designed systems fail in the first season.

[Baronkrak]

Originally Posted by sailingharry

...



But how it applies to Direct Current? Since there is no rotation, there is no angle, and there is no phase difference -- and since the cosine of zero is 1, the pf in direct current is 1. ...

There is no pf in direct current.

VA = V x A applies.

[Kelkara]

Originally Posted by s/v Jedi

That’s what I wrote: everything is fine and when it’s not, you get new ones

The point is that all my recommendations are geared towards expedition cruising. Areas where there is no Sams Club or anything really. All you get is what you bring.

My cruising just isn't that remote ... I expect to pass or stop at a place that sells vehicle starting batteries within the 5(ish) year expected lifetime of the batteries ... It's quite the expedition that doesn't!

Even with a catastropic failure of my house bank, with a bit of an eye to conserving electricity, I can run the boat happily off the starter battery until new batteries can be found. Simplicity has it's benefits. As long as what you bring is up to the task you ask of it, it doesn't have to be fancy.

[s/v Jedi]

Originally Posted by Kelkara

My cruising just isn't that remote ... I expect to pass or stop at a place that sells vehicle starting batteries within the 5(ish) year expected lifetime of the batteries ... It's quite the expedition that doesn't!

Even with a catastropic failure of my house bank, with a bit of an eye to conserving electricity, I can run the boat happily off the starter battery until new batteries can be found. Simplicity has it's benefits. As long as what you bring is up to the task you ask of it, it doesn't have to be fancy.

Agreed. There are many places where batteries aren’t sold. This includes all the places where there are no stores, no roads, no utilities, nothing
Actually, we tend to avoid places where they have those things.

How we deal with this is first having redundancy, so we have two house batteries and two start batteries and we can do with just one. Two inverter/chargers, solar controllers, dc-dc converters, everything double.

For technology, we are slow to switch to new technology. It’s only this year that our two house batteries are both Lithium. We first tested one lithium battery for two years before changing the other one, which was AGM. 10 years ago we went from flooded lead acid to AGM the same way.

This approach has worked for me for more than 50 years

[GordMay]

Originally Posted by Baronkrak

And how did you calculate that power factor of "1.000000" ?

Power factor is defined as the cosine of angle, between the voltage phasor and the current phasor.
pf = CosØ
In a DC circuit, the current and voltage are always in phase, which is another way of saying that the phase difference, between the current and voltage, is zero degrees; and the cosine of zero, is one.

[Baronkrak]

Originally Posted by GordMay

Power factor is defined as the cosine of angle, between the voltage phasor and the current phasor.
pf = CosØ
In a DC circuit, the current and voltage are always in phase, which is another way of saying that the phase difference, between the current and voltage, is zero degrees; and the cosine of zero, is one.

Come on Gord your are an electrician you should not be confusing AC with DC.

[Jamme]

So:

- Ah in a battery is the equivalent of how many pretzels I have in a bag. 🥨

- Amps is the equivalent of how fast I’m gonna eat these pretzels. 🥨 🥨 🥨🥨

The same pretzel bag can last an hour or a whole day, depending on how pretzel-hungry I am.

Scientific enough?
[emoji3][emoji253] ✌️ ☮️