Standby, own power consumption when using no electricity of 25-40 watts, sure I thrust those measurements.
Efficiency is given as a fixed number in all speciation.
Let's say it's 95%
Yes, you wrote how this "fluctuate" depending on load.
Or, own (idle) consumption is higher at lower power usage.
It's fine by me what you guys like to call it.
On "average" people use about 25% of their rated capacity.
Information from 9 installations, myself included.
At night it's even lower, airconditioning doesn't need to work hard (or cool at all during cool season), same for refrigerator.
When people sleep they tend to use less energy when awake.
Either the self consumption rises at lower power draw, or efficiëncy reduced, end result is the same.
The amount of energy drawn from storage.
That is the same for lead acid and LiFePO4.
What is totally different from efficiency is the amount of energy you put in, and can take back out.
Where I like to say "use 85%" for lead acid and 95% for LiFePO4.
Again, sceptical numbers, both can probably get a few more %.
But great indication on what you really can use.
Many people new to this world think an 12v 200Ah lead acid can give over 2kwh ...day after day after day for 5 years or more..
They don't last 5 years with usage like that.
Edison's will, even 50 years, but they are massive
really huge.
Real life is what you get when you use it.
Using 600 watt how much is drained from the storage?
At night, for us, cool season even as low as 150 watts..
I have 3* cheaper 3200w China inverters that work perfectly, (and parallel) but do have higher own consumption.
75 watt at 150 watt usage.
35w when I don't use power at all.
That 75w stays the same at 250, 1000 1500 and 2000 watt.*
* Power usage for 1 unit.
Indeed, for my almost 10kw I can have 225w "idle" loss when using all 3 @ lower or higher capacity.
It's stays relative stable, for 500,1000 or 5000 watt.
2 are in use the third is spare or "ready to switch on" if power above 6400 watt is needed.
Perhaps I'm just lucky to have more stable efficiency that doesn't fluctuate.
End of the day, at the end of all the calculations, it matters how much energy is drawn from its storage.
That is the combined number of known power consumption
(water boiler of 600 watt?)
And the combination of self consumption and efficiently where both fluctuate.
What is what is for me not so important.
What is important is that the water boiler (600 watt) really does use 700 watts* stored energy at my house.
* On 1 inverter.
Cool season with 150 own power, I drain 300w.
That's fine.
I didn't want to spend $5000,-
But bought "a few" more panels and 15kwh battery extra..
Now my mining rig that uses 750w 24/7 have enough juice
It makes just 5 to 6 dollars a day.
But "earns" a new Victron in 3 years..
Low frequency inverters usually use more idle, it's the massive heavy coil...
With the famous slight humming sound.
But.... They "don't die"..
Controlling PCB might need replacement after 10 or 15 years, the coil will be working fine after 30. With the efficiency of 30 years ago... Probably newest controllers can boost a few%. You never need to buy new.
Depending on your wishes... It can be the best solution
High frequency Inverter...
Indeed, all about the quality of the components.
They won't last 30 years.
I expect my cheaper China models to last 5 to 7 years.
Victron 10-15 years.
At 10% of the price...not a bad tradeoff.
Sure. Rolls Royce, Bentley, Maserati, Mercedes...
Or Outback, Victron...
You pay top dollar and get quality (most of the time)
That's no reason to talk negative about MPP Solar, Growatt, Sorotec or EPEver.
We don't all drive a Rolls...
Have Rolex and talk about the low quality of Adidas compared to Balenciaga pool side sandals....
Just don't try to compare them.
I can't afford Balenciaga pool side sandals for $295,-
Nor a Victron or outback for $5000,-
We aren't all American.
Indeed, great "great first-pass indicator of the quality of the unit"
Probably the purchase price, 20% of Victron, should already tell you enough.....
Still a great unit with amazing capabilities for its price.
And the $4000 that you save now is enough to buy one spare, 15kwh extra battery (LiFePO4 ) and 15kw solar ( 35* solar 435w)
It's not a show off to the club.
But beats the -peep- out of the Victron at the end result.
Solar power production, total storage capacity and consumption availability.
I did read about micro inverters.
Enphase IQ 7 97% efficient and 25 years of warranty.
For about $125 per 440 watt..
You get an 17kwh inverter
Sadly.. only when the sun is shining.
If I would be grid tied, those are my first choice for efficiëncy and quality.
And small (10-15kwh) backup system for the night if there is power failure @the grid.
Grid tied, with $5000,- budget, and probably already more then 35* 450w pannels, aiming to last with minimal maintenance or supervision... It's a tough one to beat that IQ7