On-grid domestic battery storage

Starfrog

I was under the impression that my enphase monitor would be the most accurate report for PV generation ? 

Starfrog

when charging my battery set of 4.8kw from the solar is it normal that when my solar is producing nearly 3kw that it only uses about a 1k to charge the battery even though the rest of the PV is going into he grid and the small amount for the house ?

EVandPV

Starfrog said:

I was under the impression that my enphase monitor would be the most accurate report for PV generation ? 

Should be pretty much the same as your pv meter.
Actually, do you even have a meter if your not getting paid for your generation ?

EVandPV

Starfrog said:

when charging my battery set of 4.8kw from the solar is it normal that when my solar is producing nearly 3kw that it only uses about a 1k to charge the battery even though the rest of the PV is going into he grid and the small amount for the house ?

I was looking at one of your graphs you posted upthread Starfrog and was a bit confused.
Your stats showed 20kwh generated yet your graph had only peaked at 0.8kw. There's no way your system could generate 20kwh in a day when it only reached a max of 0.8kw.
Can you post another screenshot of your live pv stats.
Could you also post a screenshot of your Lux stats.

EVandPV

Actually, I just noticed it says "kwh" on the left side of the graph as opposed to kw so the graph looks like your energy generated for the day as opposed to power generated as I first thought.
My bad. 😄

Starfrog

Heres the detail you asked for and yes I have a meter but just a basic one not smart at all (bit like me !) 

EVandPV

Do you have a seperate meter for your solar or just the one you've always had for your electric consumption ?
I can certainly see from your Lux graph that you were exporting a few kw before your batteries reached 100%.
The charge power does reduce as your batteries reach full charge but not usually until they reach about 80-90%.
Did you say your batteries are kept outside or in your garage ?

Starfrog

There in garage but aoboet are good even when cold. I have the emphase monitor for Solar and use the lux for battery and everything else (it also says solar production but it’s the same as what enphase reports and as enphase is my microinverters then I’m thinking the enphase report is more accurate 

mickyduck55

Starfrog said:

Heres the detail you asked for and yes I have a meter but just a basic one not smart at all (bit like me !) 

My consumption is NEVER at "0" unless I have a power cut Something is not right ?

EVandPV

Starfrog said:

There in garage but aoboet are good even when cold. I have the emphase monitor for Solar and use the lux for battery and everything else (it also says solar production but it’s the same as what enphase reports and as enphase is my microinverters then I’m thinking the enphase report is more accurate 

Yeah, if you don't have a seperate pv meter then your enphase stats will be the most accurate. As I say, you would only need a pv meter if you were getting paid for your generation.
The only reason I could think of that your batteries are not getting full power from your pv is low temperature, that would certainly be the case with Pylontechs but yeah, the blurb for Aoboets does say "they remain at full capacity down to zero degrees" so I'm at a loss.
I take it your system charge power is at 100% ?