So thats why am having this loss, 550w shows as incoming from panels,
Then only 310w as going to charge battery, no load.
So 240w goes to waste????. That is huge.
2nd question, what would make 21 x 250w panels produce only 740w in bright sunlight?.
Lithium battery not full.
Used to work well b4
First question,
Yes, correct.
I noticed with Ammeters that the first 100 watt generated with the solar panels vanishes before the Mppt starts providing Energy to the Revo.
Second step is the own power consumption of the unit.
That is for a 5.5kw unit about 100 watt.
Don't feel bad about it.
A Victron 3kw using 50 watt also just to have AC "stand by" (output life, except noting using the power)
off-grid garage showed this in a video about 15 monthe ago.
There is your 200 watt standard losses.
The other 40?
Probably some measurements inconsistency.
21*250 or probably 3*7 36v?
7*36=252 volt, right?
5250 watt theoretical.
my experience is that even with +7000 watt solar the Revo II provide max 4200-4400 (different units, different results)
while you miss out on the 2-3 hours absolute peak, due the "overcapacity" you reach that 4200 soon, and stays long.
I now have 3 sections of 2*7 345w
(As I use 3 x Revo II)
this gives be the best performance.
Usually my 54 kWh battery is recharged before noon.
It's the rainy season that need the "Overkill" on solar.
Living off grid does have its benefits and drawbacks.
One of the benefits is that I don't have to deal with all the hassle that seems to be there when you connect to the grid.
"2nd question, what would make 21 x 250w panels produce only 740w in bright sunlight?.
Lithium battery not full."
- i assume you are connected to the grid.
Advice that I've given before and will again, disconnect from the grid.
set it to solar only and see if the problems are still there.
Probably they strange behavior is gone.
As I don't have grid, I can't really help in fixing it.
A work around is using an automatic transfer switch, where the Revo is the main power source.
And you use the grid as backup power source.
Downside of this solution is that you can not feed to the grid.
Nor charge the batteries via the grid.
But... It will work
If you aren't connected to the grid, you probably have the wrong battery profile.
Setting it to lithium is S15 or 48v
Not 51.2v
To get the correct setting is a bit tricky.
1. Choose lead Acid, safe , exit, reboot
2. choose lithium, safe, exit, reboot.
3. Choose "user own setting" i set 54 and 54.2v (if i remember correctly, need to Check but not at home now)
Anyways.. really close toget and it gives be about 90% charge.
Sadly.. the Revo doesn't always register correctly.
It will look like all settings are registered, but it will charge up/over 58v... (!!!)
Steps 1 to 3 probably will correct this.
Sometimes several times is needed.
It's working now, so i don't play around with it because of this risk.
My best guess is if you are not connected to the grid , you choose lithium, aka S15 and you have S16