Inverter(s) tripping

[Sunking]

Watt is a unit of energy and within a time frame becomes a unit of work done. Similar to the difference between amp and Coloum (sp?)

No it is not similar. You do not know the difference between power and work (energy) the very basic principles of any engineering fields which you claim to be an EE is a lie. Any Enginner, heck even a fisrt year student, can clearly differentiate between the two and know they are not the same. That is why you are getting your butt kicked in every thread you appear in. You do not know squat, and trying to act like an expert which has been clearly pointed out you are a fraud. That is what we can agree too.

[BritishPete]

Yes!



No, it's a measure of power.

How many fields will 1 horse plow? You can't answer that because all you know is power. You need to know energy, which is power times time.

Now, how many fields will 1 horse plow in 1 day? You CAN answer that, because a horsepower-day is a measure of energy, and thus can do a certain amount of work.

Yes and is it a leap of ingenuity to understand what; 180 watts consumed in one day? if it were then why would I add the "one day" LOL!

I guess we all agree to differ and in future I shall say; 180 watt hours in one day unless I feel more like saying; 4.5 million watt seconds in a week of course.

[billvon]

Yes Mike I screwed up my grammar there! I agree. however; 1 hp = 736 watts not 736 watt hours right?

Yes!

and 1 hp is a measurement of work done right?

No, it's a measure of power.

How many fields will 1 horse plow? You can't answer that because all you know is power. You need to know energy, which is power times time.

Now, how many fields will 1 horse plow in 1 day? You CAN answer that, because a horsepower-day is a measure of energy, and thus can do a certain amount of work.

[BritishPete]

No, it's power measured in an instant. NO time, just any given instant.

Yes Mike I screwed up my grammar there! I agree. however; 1 hp = 736 watts not 736 watt hours right? and 1 hp is a measurement of work done right? Check it out. If it took the horse all day to plough a field then what? is that 24 HP ?A
Watt is a unit of energy and within a time frame becomes a unit of work done. Similar to the difference between amp and Coloum (sp?)

[Mike90250]

...
I strongly disagree with you. WATT is a measurement of power in a given time frame....

No, it's power measured in an instant. NO time, just any given instant.

[BritishPete]

I like your design though it s neat.

[BritishPete]

Well, it wastes (.7 * DC current draw * hours of draw) watt-hours per day. If you have the power to spare, great, then it's not an issue.

If not, here's another option:[ATTACH=CONFIG]1842[/ATTACH]

This is effectively a very high power LDO. It will limit voltage to 15 volts (to whatever you set it to actually.) It works similarly to the diode in that it adds a voltage drop to the circuit, but doesn't need to be switched in and out, and thus will always dissipate the least possible power while keeping the inverter's voltage below 15 volts. It is good to 360 amps, and the NFET's can be paralleled to increase that as high as you like.

Parts are about $10.

Thanks for a pertinent contribution. The fact is though that I am only wasting power which would be otherwise unused (so no waste really) and even then only; 15 amps (average inverter draw) x 0.7 volts for about 2 hours a week or 15 x 0.7 x 2 = about 20 Whrs per week. Very easily spared with about 50,000 whrs a week available.

[billvon]

So back to topic.

The diode works great for me, saves me many $$$ in changing out my inverters and wastes absolutely zero power that would not be wasted anyway. In fact it GAINS power because the batteries can be charged at a higher rate.

Well, it wastes (.7 * DC current draw * hours of draw) watt-hours per day. If you have the power to spare, great, then it's not an issue.

If not, here's another option:PowerLDO.jpg

This is effectively a very high power LDO. It will limit voltage to 15 volts (to whatever you set it to actually.) It works similarly to the diode in that it adds a voltage drop to the circuit, but doesn't need to be switched in and out, and thus will always dissipate the least possible power while keeping the inverter's voltage below 15 volts. It is good to 360 amps, and the NFET's can be paralleled to increase that as high as you like.

Parts are about $10.

[BritishPete]

I was hoping you would step into that trap. You are too easy. I gave you rope and you hung yourself with it. Tell you what; I will let others tell you that you do not know what your are talking about. I will give you a clue, what does 30 amps x .7 volts =

It doesn't matter! it is still coming out of the otherwise wasted 60 amps!!! and in any case 30 x -7 = 21 watts not the 152 watts gained. Where did you learn math?

So I gained 152-21 watts big deal. But you are still missing as MAJOR point the diode ONLY goes to the inverters NOT the batteries so no load no waste.

[BritishPete]

Read all of my posts and you shall see.

[Sunking]

I shall; When my PV array is capable of generating say 80 amps ant 14.8V but is only charging the batteries at 20 amps because they are 80% full where is the 60 amps going? Answer WASTED. Now install a diode that will permit me to increase charge current to 30 amps (at say 15.2V) without tripping the inverters and I have GAINED 10 x 15.2 = 152 watts not wasted.
It is not rocket science but some would have us believe it is.

Remember I have 1000AH of battery so no need to pretend I will fry them at 30 amp charge.

I was hoping you would step into that trap. You are too easy. I gave you rope and you hung yourself with it. Tell you what; I will let others tell you that you do not know what your are talking about. I will give you a clue, what does 30 amps x .7 volts =

[BritishPete]

Yes back on topic please. Since when did a diode quit consuming power. Please tell us so we will all know.

I shall; When my PV array is capable of generating say 80 amps ant 14.8V but is only charging the batteries at 20 amps because they are 80% full where is the 60 amps going? Answer WASTED. Now install a diode that will permit me to increase charge current to 30 amps (at say 15.2V) without tripping the inverters and I have GAINED 10 x 15.2 = 152 watts not wasted.
It is not rocket science but some would have us believe it is.

Remember I have 1000AH of battery so no need to pretend I will fry them at 30 amp charge.

Also all of this is done with automatic battery temperture monitoring by my MPX 80 which will reduce charge current if needed.

[Sunking]

So back to topic.

The diode works great for me, saves me many $$$ in changing out my inverters and wastes absolutely zero power that would not be wasted anyway.

Yes back on topic please. Since when did a diode quit consuming power. Please tell us so we will all know.

[BritishPete]

So back to topic.

The diode works great for me, saves me many $$$ in changing out my inverters and wastes absolutely zero power that would not be wasted anyway. In fact it GAINS power because the batteries can be charged at a higher rate.

[Sunking]

So second or hour is OK but not DAY Huh! I think some are splitting the superlative here!

No spiting superealtive, just one who is clueless. There is no such thing as a 180 watt/day