6 MWh SRNE ASF48100U200-H 10kw.

[Kenny_]

Does it automatically restart, or does it have to be manually restart after error? Could be problematic in an unsupervised remote off grid location.

If I remember right. I restarted the inverter manually the first time. And it went away on its own the second time.

 

[Snick60]

I suspect they won't be over achievers for very long... 8s2p would be a solid array, I think you would lose out on a few KWhs / day during optimal conditions... Could always just buy an HYP inverters to use as another MPPT and extra 5kw AC output...

Very nice !

 

[42OhmsPA]

Must have had some really nice cloud edging between snow squalls.
Maxed out both MPPTs, sun angle is definitely changing

 

[nickj]

hit 1 mw myself today. still zero trouble

 

[42OhmsPA]

I'm going to have to test if this can run a dump load by enabling ON GRd.
I'd leave the grid breaker off and add a resistive load to the grid panel.
I hope it will power the dump load when the batteries are full but I don't think it will work without sensing the grid.
Thoughts?



Just over 3.3MWh, still extremely happy.

Roof arrays are finally starting to perform nicely (MPPT2), ground mount is due for another slight adjustment.

Edit - sorry the screenshot was compressed so poorly.

 

[G00SE]

Back from your road trip so soon??

 

[42OhmsPA]

Back from your road trip so soon??

Hopefully later this week... Waiting for photos of something besides sealed boxes on a pallet...

 

[BuffaloTrace]

I'm going to have to test if this can run a dump load by enabling ON GRd.
I'd leave the grid breaker off and add a resistive load to the grid panel.
I hope it will power the dump load when the batteries are full but I don't think it will work without sensing the grid.
Thoughts?

View attachment 202534

Just over 3.3MWh, still extremely happy.

Roof arrays are finally starting to perform nicely (MPPT2), ground mount is due for another slight adjustment.

Edit - sorry the screenshot was compressed so poorly.

SICK BRO!! My CA panels performing top notch once again. I'm at about 1 month suck....

 

[42OhmsPA]

Finally some excitement.
I can come confirm it does automatically restart after a shutdown, I can't tell exactly what caused the shutdown but am betting the well pump spike while washer was agitating. I'm pretty sure it was agitating when things got quiet
It had already rebooted by the time I got downstairs, I did hear the pressure switch for the well pump click shortly after I got downstairs.
.
Loads were pretty balanced, ~2500W per leg +/- 300W.
Oil radiator on high
Water distiller
Steam generator
Induction cooktop on high
Mini split in heating mode
Washing machine / well pump
The rest of the house, lights ceiling fans, TV, etc.

Pretty much identical loads were running earlier today but the induction cook top wasn't on high, only medium.

Anyway it's trucking along just fine, kinda irritated I didn't catch any fault codes.

 

[Kenny_]

Interesting. Thanks!

 

[42OhmsPA]

Better quality screenshots attached.
Off to sear some filets with the bro.

 

[42OhmsPA]

I do believe it's working...
The non logical side of me says cancel my grid service and use a generator for the really crappy times, I think it makes sense after the next expansions.
I could have done much better in the beginning of the year if I didn't use the grid to charge the batteries full on multiple occasions.

 

[Kenny_]

Excellent!!

 

[marionw]

Cancel the grid, disconnect completely and have @Kenny_ send you all the extra he generates.

Here is a question for which I have absolutely no answer (yet). For every 1kwh of power I pull from my battery bank, how many kwh of grid power does it take to replace/recharge the 1kwh. Can't be a one for one due to charger inefficiencies and can't be less as you would have something approaching perpetual motion. There are a number of folks on this forum who produce power during peak using solar and battery and charge the battery during off peak, are they really saving money?

 

[Kenny_]

Cancel the grid, disconnect completely and have @Kenny_ send you all the extra he generates.

Here is a question for which I have absolutely no answer (yet). For every 1kwh of power I pull from my battery bank, how many kwh of grid power does it take to replace/recharge the 1kwh. Can't be a one for one due to charger inefficiencies and can't be less as you would have something approaching perpetual motion. There are a number of folks on this forum who produce power during peak using solar and battery and charge the battery during off peak, are they really saving money?

I can't imagine that saves much if at all... There have been a few threads on it I think. I never really considered that approach other than when I need(ed) to charge from the grid I'd try to do it "Off Peak."

I'm prepping my Tesla Power Transmitter to beam the extra PV out...

 

[42OhmsPA]

Cancel the grid, disconnect completely and have @Kenny_ send you all the extra he generates.

Then he couldn't run that coffee maker

Here is a question for which I have absolutely no answer (yet). For every 1kwh of power I pull from my battery bank, how many kwh of grid power does it take to replace/recharge the 1kwh. Can't be a one for one due to charger inefficiencies and can't be less as you would have something approaching perpetual motion. There are a number of folks on this forum who produce power during peak using solar and battery and charge the battery during off peak, are they really saving money?

That's a great question that my brain is to tired to put much thought into after work...
I would guess the off peak rates have to be at least 30% cheaper to make it worthwhile in the long term.

No mention of grid charging efficiency in the manual.

 

[Kenny_]

Then he couldn't run that coffee maker

True!!!

 

[Zwy]

Cancel the grid, disconnect completely and have @Kenny_ send you all the extra he generates.

Here is a question for which I have absolutely no answer (yet). For every 1kwh of power I pull from my battery bank, how many kwh of grid power does it take to replace/recharge the 1kwh. Can't be a one for one due to charger inefficiencies and can't be less as you would have something approaching perpetual motion. There are a number of folks on this forum who produce power during peak using solar and battery and charge the battery during off peak, are they really saving money?

It is about TOU and the rates. Basically the load is shifted to off peak rates. If off peak was $0.30/Kwh and peak $0.54/Kwh, it sure would make a difference in the electric bill.

One could make it pay if off peak is cheap enough and peak rate is high enough. Some places even have free electricity in the middle of the night so that would make sense to just have a battery bank and inverters, no PV.

 

[marionw]

It is about TOU and the rates. Basically the load is shifted to off peak rates. If off peak was $0.30/Kwh and peak $0.54/Kwh, it sure would make a difference in the electric bill.

One could make it pay if off peak is cheap enough and peak rate is high enough. Some places even have free electricity in the middle of the night so that would make sense to just have a battery bank and inverters, no PV.

Although it seems true; If it takes 2 kwh at $0.30/Kwh off peak to replace/charge each 1kwh pulled from the battery during peak hours I would be spending $0.60/Kwh to recharge the battery, not a savings but an increased cost. I would have been better off spending $0.54/Kwh during peak hours rather than pull it from the battery to recharge at what amounts to be a higher rate.

 

[nickj]

I do believe it's working...
The non logical side of me says cancel my grid service and use a generator for the really crappy times, I think it makes sense after the next expansions.
I could have done much better in the beginning of the year if I didn't use the grid to charge the batteries full on multiple occasions.

how are they not mad about you about this? They must know something is up

 

[nickj]

oh and congratulations

 

[42OhmsPA]

how are they not mad about you about this? They must know something is up

I don't know. I always pay my bill on time and leave a small credit, maybe that helps.
Really it's a positive for them until I decide to charge with 8kW from the grid.
They definitely have to know something is up. I know they've seen my ground mount array, they used my driveway as a turn around last time the grid was down....

If it ever becomes an issue I'll politely tell them to disconnect my service completely.

oh and congratulations

Thanks.

 

[Zwy]

Although it seems true; If it takes 2 kwh at $0.30/Kwh off peak to replace/charge each 1kwh pulled from the battery during peak hours I would be spending $0.60/Kwh to recharge the battery, not a savings but an increased cost. I would have been better off spending $0.54/Kwh during peak hours rather than pull it from the battery to recharge at what amounts to be a higher rate.

Charging efficiency will not be 50%. Take the EG4 Chargeverter as an example, the efficiency is 94% on 240V and 92% on 120V.

 

[marionw]

Charging efficiency will not be 50%. Take the EG4 Chargeverter as an example, the efficiency is 94% on 240V and 92% on 120V.

Again true.

What about the charge/discharge efficiency for LifePo4 cells or the battery as a whole including BMS induced losses. It all adds up.

Real world efficiency of LiFePO4

So I'm gearing up to jump in to LiFePO4 and as I calculate and estimate and my spreadsheet gets bigger and bigger, I'm wondering, how real are the charge / discharge efficiencies I read about online? I'm looking to put together a 48v system; where my battery bank will stay between 25% and 80%...

diysolarforum.com

 

[Zwy]

Again true.

What about the charge/discharge efficiency for LifePo4 cells or the battery as a whole including BMS induced losses. It all adds up.

Real world efficiency of LiFePO4

So I'm gearing up to jump in to LiFePO4 and as I calculate and estimate and my spreadsheet gets bigger and bigger, I'm wondering, how real are the charge / discharge efficiencies I read about online? I'm looking to put together a 48v system; where my battery bank will stay between 25% and 80%...

diysolarforum.com

92% https://diysolarforum.com/threads/real-world-efficiency-of-lifepo4.6464/post-67686 That is still a long, long way from 50% loss. If peak is $0.54/Kwh, any rate under $0.45/Kwh is a gain.