Hi Guys 

I've had a Dete inverter installed at my warehouse (5kw (Battery & Inverter) + 8x550 Jinko Solar). It works perfectly to power the office and is more than enough. Our power use is highest during the day, aircons + PC's on etc, and in the evening, it's only the outside LED spotlights + cameras. 

I've watched a few time of use videos and I'm still confused on how to set it properly. Our load at night is about 400w from the lights, fridges and cameras. I want to do the following:

1. 17:00 - 21:00 - Everything runs off the battery + the little solar power still being generated (everyone has left work) 
2. 21:00 - 00:00 - Everything runs off the battery
3. 00:00 - 03:00 - Grid can top up the battery as it will be getting low at this time
4. 03:00 - 06:00 - Grid off, Back on Battery only 
5. 06:00 - 13:00 - Power from PV and battery (if needed) - Sun is starting to rise
6. 13:00 - 17:00 - Power from PV and battery (if needed) - Sun is out

My questions are the following:

1. What should I set the battery percentage to, during "downtime hours", essentially from 17:00 until 06:00 the next morning? I want it to top up slightly from the grid for like 3 hours or less, then switch back to battery only until the sun rises.
2. What should I set the battery percentages to during work hours, 07:00 until 16:30? 
3. Do I need to set times on all 6 lines? 

I ultimately want to use as little Eskom as possible as the system can power the warehouse 95% of the time. I've attached my current settings. 

Edited September 12, 20232 yr by Zweli
Clarity

Hi Zweli,

Have a look at the following thread as it should be able to assist you:

https://powerforum.co.za/topic/11682-deye-time-of-use-settings/#comment-117611

 

Hi Zweli,

Have a look at the following thread as it should be able to assist you:

https://powerforum.co.za/topic/11682-deye-time-of-use-settings/#comment-117611

Perfect. It actually helped. Thank you so much!!

 

Hi Guys 

I've had a Dete inverter installed at my warehouse (5kw (Battery & Inverter) + 8x550 Jinko Solar). It works perfectly to power the office and is more than enough. Our power use is highest during the day, aircons + PC's on etc, and in the evening, it's only the outside LED spotlights + cameras. 

I've watched a few time of use videos and I'm still confused on how to set it properly. Our load at night is about 400w from the lights, fridges and cameras. I want to do the following:

1. 17:00 - 21:00 - Everything runs off the battery + the little solar power still being generated (everyone has left work) 
2. 21:00 - 00:00 - Everything runs off the battery
3. 00:00 - 03:00 - Grid can top up the battery as it will be getting low at this time
4. 03:00 - 06:00 - Grid off, Back on Battery only 
5. 06:00 - 13:00 - Power from PV and battery (if needed) - Sun is starting to rise
6. 13:00 - 17:00 - Power from PV and battery (if needed) - Sun is out

My questions are the following:

1. What should I set the battery percentage to, during "downtime hours", essentially from 17:00 until 06:00 the next morning? I want it to top up slightly from the grid for like 3 hours or less, then switch back to battery only until the sun rises.
2. What should I set the battery percentages to during work hours, 07:00 until 16:30? 
3. Do I need to set times on all 6 lines? 

I ultimately want to use as little Eskom as possible as the system can power the warehouse 95% of the time. I've attached my current settings. 

I would set all times to 30% and leave grid charge ticked on all time slots. 

Might need a bit of manual monitoring on bad weather days. 

 

I would set all times to 30% and leave grid charge ticked on all time slots. 

Might need a bit of manual monitoring on bad weather days. 

Ok thank you. That makes perfect sense. 

Joburg is overcast today, but panels were still able to power the office and charge the battery, albeit slower. Will adjust and monitor. 

Edited September 12, 20232 yr by Zweli

I finally figured it out from a video I watched. 

All times, battery has been set to 25% as Chris had suggested. Grid charge is NOT TICKED on ALL SLOTS. 

This means the system will run on PV during the day, then in the evening, run on battery until it reaches 25%,which is at approx 3am. 

The inverter will then switch to grid but NOT CHARGE the battery. As the sun starts to rise, the battery begins charging and the grid power begins to taper off. It's 10am now and my battery is 85% full already. 

Please note my warehouse is in a loadshedding free area, so I'm not worried about the battery being empty. I bought my setup to just save on electricity and have backup on those random power cut days. 

Hope that will help someone. 

Edited September 13, 20232 yr by Zweli

 

I finally figured it out from a video I watched. 

All times, battery has been set to 25% as Chris had suggested. Grid charge is NOT TICKED on ALL SLOTS. 

This means the system will run on PV during the day, then in the evening, run on battery until it reaches 25%,which is at approx 3am. 

The inverter will then switch to grid but NOT CHARGE the battery. As the sun starts to rise, the battery begins charging and the grid power begins to taper off. It's 10am now and my battery is 85% full already. 

Please note my warehouse is in a loadshedding free area, so I'm not worried about the battery being empty. I bought my setup to just save on electricity and have backup on those random power cut days. 

Hope that will help someone. 

I said 30% to give you a margin for loading from 3am onwards based on your overnight load. 

Since you have no loadshedding go lower than 25%. Even 15% is fine. Just adjust your battery shutdown and restart % aswell. 

Example shutdown 10% restart 20%

Edited September 13, 20232 yr by Chris_S