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Author Topic: Sofar ME3000SP - How to set Force Charge & Time Discharge??  (Read 461 times)
Oly
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« on: June 28, 2020, 09:27:29 PM »

The manual isn't very clear...

Can someone please explain how to force charge and

Can someone please explain how to set when the battery is allowed to discharge?

I'm wanting to force charge during price plunge periods (not sure I'm getting it 100% right) and then (for winter months) save the batteries to only discharge after 4pm.

Thanks in advance!
Oly
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2x Trannergy 4000TL Inverter
Immersun Mk2
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nowty
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« Reply #1 on: June 28, 2020, 10:01:00 PM »

Its fairly straight forward, as default the unit is in Auto Mode, you need to change it to Time of use Mode

Settings > Work Set Mode > Set Time of use Mode

Then you can set up to 4 charging regimes and enable/disable them as required. The times not covered by your entered regimes, the unit will be allowed to discharge.

You can set charging rate, SOC cutoff, time to start, time to end, date from, date to, day of week.
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12kW+ of PV installed and 60+ MWh's generated.
Home battery storage of 40+ kWh's.
Hot water storage of 15+ kWh's.
Heat storage of 15+ kWh's.
6kW Ground source heatpump.
EV BMW i3 (another 30+ kWh's of storage).
290,000+ litres of water harvested from underground river.
Oly
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« Reply #2 on: June 28, 2020, 10:23:38 PM »

Thanks Nowty...but...

During winter I would like to:
- Force charge between midnight and 6am
- Disable the batteries from discharging between 6am and 4pm (saving my charge for the expensive 4pm to 7pm Octopus Agile period)
- Only allow the discharge of batteries (when needed by the house) between 4pm and midnight

From what you have said step I can force charge, but not save the batteries for later in the day?

I have just tried this with Set Timing Mode - but when setting the discharge time, this means that the system actively discharges itself to the grid (a scary few moments watching todays sunshine and force charge start draining away!  So not applicable to my purposes!
« Last Edit: June 28, 2020, 11:00:05 PM by Oly » Logged

Nibe F1245 Ground Source Heat Pump
Charnwood C-Five Logburner
28x Solarworld 275W PV Panels
2x Trannergy 4000TL Inverter
Immersun Mk2
Geo Solo Monitoring
8x 2.4kWh Pylontech Batteries
2x Sofar ME3000SP Inverter
greentangerine
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« Reply #3 on: June 28, 2020, 11:07:31 PM »

You can manage this by setting the ME3000 into passive mode (via the front panel) and then controlling it via a Pi or similar using Modbus over the RS485 interface. 

I've been doing this since March to leverage Octopus Go and it works fine. 

Still haven't go it fully automated to charge overnight based on the weather forecast and predicted domestic usage for later in the day but manually tweaking the charge threshold of the battery from my 'phone is easy enough.
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2.115 kWP (Kinve KV235-60P/SB1600)
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Oly
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« Reply #4 on: June 28, 2020, 11:17:05 PM »

You can manage this by setting the ME3000 into passive mode (via the front panel) and then controlling it via a Pi or similar using Modbus over the RS485 interface. 

I'd love to do this, but just out of my tech knowledge at present!!  I've got my wife and daughter onto it though!! 
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Nibe F1245 Ground Source Heat Pump
Charnwood C-Five Logburner
28x Solarworld 275W PV Panels
2x Trannergy 4000TL Inverter
Immersun Mk2
Geo Solo Monitoring
8x 2.4kWh Pylontech Batteries
2x Sofar ME3000SP Inverter
Oly
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« Reply #5 on: June 28, 2020, 11:33:49 PM »

Our Sofar units are connected to the wifi and I have the app, does this mean that they automatically update their internal clock when the clocks change from BST to GMT and vice versa?
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Nibe F1245 Ground Source Heat Pump
Charnwood C-Five Logburner
28x Solarworld 275W PV Panels
2x Trannergy 4000TL Inverter
Immersun Mk2
Geo Solo Monitoring
8x 2.4kWh Pylontech Batteries
2x Sofar ME3000SP Inverter
nowty
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« Reply #6 on: June 29, 2020, 12:19:18 AM »

Oly, please read my post again carefully.

You set the wrong Mode. ‘Timing Mode’ is NOT ‘Time of Use Mode’

Yes you can do what you want as you can set 4 regimes and from what you say, you only need 2.

The first one is charge midnight to 6am.

The second is charge at zero watts from 6am to 4pm so wont charge, but wont discharge either.

You don’t set anything for 4pm to midnight as it will default to auto mode during those times because you have not set a regime.
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12kW+ of PV installed and 60+ MWh's generated.
Home battery storage of 40+ kWh's.
Hot water storage of 15+ kWh's.
Heat storage of 15+ kWh's.
6kW Ground source heatpump.
EV BMW i3 (another 30+ kWh's of storage).
290,000+ litres of water harvested from underground river.
brackwell
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« Reply #7 on: June 29, 2020, 06:58:51 AM »


The second is charge at zero watts from 6am to 4pm so wont charge, but wont discharge either.


Nicely explained.

If one has PV can you get to charge from PV but not grid and discharge as house requires.?  PS i do not have a system, just thinking about it.

Surely the whole idea was to use PV to the max by time shifting not play Agile.
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Oly
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« Reply #8 on: June 29, 2020, 08:39:26 AM »

Oly, please read my post again carefully.

You set the wrong Mode. ‘Timing Mode’ is NOT ‘Time of Use Mode’

Yes you can do what you want as you can set 4 regimes and from what you say, you only need 2.

The first one is charge midnight to 6am.

The second is charge at zero watts from 6am to 4pm so wont charge, but wont discharge either.

You don’t set anything for 4pm to midnight as it will default to auto mode during those times because you have not set a regime.

Many thanks Nowty, as Brackwell says - nicely explained about the Zero Watts charge.  So under that regime, (theoretically) if our batteries were only charged to say 80% capacity at 6am would any solar made during the day charge them until they were full?

(Don't worry, I hadn't misread your post, I just thought I'd try the Timing Mode to overcome the issue I seemed to have!)
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Nibe F1245 Ground Source Heat Pump
Charnwood C-Five Logburner
28x Solarworld 275W PV Panels
2x Trannergy 4000TL Inverter
Immersun Mk2
Geo Solo Monitoring
8x 2.4kWh Pylontech Batteries
2x Sofar ME3000SP Inverter
nowty
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« Reply #9 on: June 29, 2020, 11:00:31 AM »


Many thanks Nowty, as Brackwell says - nicely explained about the Zero Watts charge.  So under that regime, (theoretically) if our batteries were only charged to say 80% capacity at 6am would any solar made during the day charge them until they were full?


Never used it that way so I don't know for sure but I think not. However your not likely to have much surplus PV in winter anyway, so you just have to decide whats more important, losing a small amount of PV or paying the premium import price after 4pm (assuming your on Agile). If you use an Immersun (or similar diverter), any surplus PV would still get diverted instead of going to the grid.

And if it turns out to be an exceptional sunny day, you can always manually disable the regime for a day.
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12kW+ of PV installed and 60+ MWh's generated.
Home battery storage of 40+ kWh's.
Hot water storage of 15+ kWh's.
Heat storage of 15+ kWh's.
6kW Ground source heatpump.
EV BMW i3 (another 30+ kWh's of storage).
290,000+ litres of water harvested from underground river.
Oly
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« Reply #10 on: June 29, 2020, 11:44:46 AM »

OK, thanks.  Yes that was what we were thinking, it's probably not smart enough to charge from the solar and not the grid.  And yes, on a sunny day we simply revert to putting the washing on when the sun comes out!
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Nibe F1245 Ground Source Heat Pump
Charnwood C-Five Logburner
28x Solarworld 275W PV Panels
2x Trannergy 4000TL Inverter
Immersun Mk2
Geo Solo Monitoring
8x 2.4kWh Pylontech Batteries
2x Sofar ME3000SP Inverter
Oly
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« Reply #11 on: June 29, 2020, 12:23:53 PM »

Does the Sofar update its time when the clocks change from GMT to BST or am I going to need to do this manually?
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Nibe F1245 Ground Source Heat Pump
Charnwood C-Five Logburner
28x Solarworld 275W PV Panels
2x Trannergy 4000TL Inverter
Immersun Mk2
Geo Solo Monitoring
8x 2.4kWh Pylontech Batteries
2x Sofar ME3000SP Inverter
greentangerine
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« Reply #12 on: June 29, 2020, 12:27:13 PM »

Automatically I think - it gets it from the ether.
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2.940 kWP (Sharp ND210/Solis 4G 2.5)
2.115 kWP (Kinve KV235-60P/SB1600)
2.000 kWP (Sharp ND250/SB1600)
65 x Ø58mm SunnPro/Torrent T280 RE OV/SunSpeed2 205
11kW Dean Forge Croft Clearburn 10,000 BTU
SoFar ME3000SP/Pylon US2000 19.2kW
immerSUN 2
[url=http://pvoutput.org/list.jsp?id=4602&sid=195
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