Solar - 8kW Hybrid Inverter w/10kWh (upgraded to 20kWh in Sept. 2022) ESS/battery (not DIY)

[lom]

 

5 hours ago, ExpatOilWorker said:

The UPS scenario I am looking for is that the inverter will use battery down to say 30%, then switch to grid. If the grid then goes down, the inverter will go back to battery until a lower, say 10%, battery protecting SOC. Is there an option for that?

Yes.

Continue a bit further down is section 5.7  to "Time of use".  Time of use when activated controls charging/discharging when grid power is present. The setting takes precedence over the battery setting in section 5.6.

 

I have the battery setting in 5.6 at 10% deepest discharge but at 20% between 4 am to 8 am in time of use.

If battery goes down to 20% when grid is active then grid will take over, if grid is inactive then I have another 10% until the inverter stops producing from battery.

You can also charge the battery from the grid at a certain time based on the SOC setting in Time of use.

[lom]

[ExpatOilWorker]

3 hours ago, lom said:

 

Yes.

Continue a bit further down is section 5.7  to "Time of use".  Time of use when activated controls charging/discharging when grid power is present. The setting takes precedence over the battery setting in section 5.6.

 

I have the battery setting in 5.6 at 10% deepest discharge but at 20% between 4 am to 8 am in time of use.

If battery goes down to 20% when grid is active then grid will take over, if grid is inactive then I have another 10% until the inverter stops producing from battery.

You can also charge the battery from the grid at a certain time based on the SOC setting in Time of use.

That is absolutely brilliant. I see you have different settings during the day, so during cloudy days, you will always start the night with 50% batteries.

Just one question, shouldn't your grid charge settings be ON?

What brand of inverter are you using?

 

 

[scorecard]

On 8/8/2022 at 9:38 AM, motdaeng said:

thanks for sharing all the useful information!

 

the house and the solar project, well done, congratulation!

i am sure, you and your family will enjoy the new home, and

the new ev-car is also on the way, what can you wish more!

 

all the best to you, regards motdaeng

 

Re the EV car, I'm wondering if there's any solar packages specific to charging a set of batteries during daylight houra and then using that charge in the batteries overnight to replenish the EV car batteries? 

[Crossy]

 

"Grid Charge" actually charges your batteries from the grid, this you probably don't want (actually, you might if you are low on battery early in the night and the grid is on).

 

This is the relevant page from the Deye manual.

 

Look at the examples.

 

It doesn't actually say it, but once you reach the stop discharge SOC the inverter will use grid power if available, if no grid then you will continue discharging until the low voltage cutoff when you get the candles out.

 

[lom]

4 hours ago, ExpatOilWorker said:

Just one question, shouldn't your grid charge settings be ON?

What brand of inverter are you using?

It is a Deye and I did previously have grid charging enabled for Time 1 but that was when we had lots of grid cuts.

That to make sure that I started midnight with not less than 28% SOC which would take me through the night without power cuts. The screenshot is from the Solarman remote monitoring and configuration program.

[ExpatOilWorker]

7 hours ago, Crossy said:

 

"Grid Charge" actually charges your batteries from the grid, this you probably don't want (actually, you might if you are low on battery early in the night and the grid is on).

 

This is the relevant page from the Deye manual.

 

Look at the examples.

 

It doesn't actually say it, but once you reach the stop discharge SOC the inverter will use grid power if available, if no grid then you will continue discharging until the low voltage cutoff when you get the candles out.

 

One (last) question 🤔.  Is the inverter sensitive to a bit of ground leakage or will the system only trip if an external ELCB or RCBO breaker is installed?

My outdoor lighting has a couple of cable joins that are just isolated with black electric tape. I have tried to fix it, but the LED lights still glow on rainy days, so I suspect the ground leakage is a bit more than the 40 mA required to trip an ELCB breaker.

I measured 32 VAC from the connection to wet ground.