hello forum members! I am looking to purchase a Deye inverter for my business, I get all day power cuts and need an efficient , long lasting combination of equipment. ive done extensive research and came across 1C and 0.5C ratings so I wanted to ask you guys for help selecting the right battery. I had been looking at pylontech only to find out that pylontech batteries are 0.5C. please give me suggestions of good dependable 1C batteries that work well with the 8k Deye inverter. I looked around the forum and saw that the Hubble AM5 is a good 1c battery but I wanted to ask for more options and I also wanted to know if the cheaper AM2 will work just as well. thank you in advance for your assistance.

Not an exhaustive list but a good place to start

http://www.pvpower.co.za/wp-content/uploads/2022/11/Deye-Approved-Battery-listDY-LV48-0006-1.pdf

File: DEYE Approved Battery list
Version： DY-LV48-0006
Date Issued: 2022-07-20
Issued by: Ningbo Deye Inverter Technology Co.,Ltd

Would be interesting to know what your energy needs are, and how many batteries you intend buying. Also, at what time of the day, and do you need power throughout the night. What are your peak loads and what type of loads do you need to carry? Motorised equipment or ordinary office loads?

The "C" thing should not be your primary criteria for buying a battery. 

It only becomes an issue when one only has a few batteries, and with current loadshedding having 1c vs c/2 is irrelevant.  One needs batteries to last at least 6 hrs.

With an 8kW inverter, you'd need at least 2x5kW batteries. So in effect you'd drain your battery in just over an hour at 1C. What about the other 4,5,6 hrs of loadshedding?

Also, if you have split your db do you actually need 8kW of power on the non-essential loads?

 

On 2023/03/11 at 8:50 PM, GreenFields said:

Would be interesting to know what your energy needs are, and how many batteries you intend buying. Also, at what time of the day, and do you need power throughout the night. What are your peak loads and what type of loads do you need to carry? Motorised equipment or ordinary office loads?

Hi thank you for your response, Id like to have 2 or 3 batteries connected to the inverter. as for the business it is a medium sized supermarket our operating hours are 7am to 730 pm, peak is 12 to 2pm and 4pm to 7pm. On some days we may need to run it 7 to 7.  our equipment is 

 

1 Cold room

Deli Food warmer/display
a large Stove with an oven

5 computers

Several Lights

A television 

Meat slicer

3 large fridges

3 small fridges

2 freezer chests
2 microwaves
1 Printer

 

I have a 5k mercer axpert with 3 100ah batteries (2 of them being averge) at present, however my last installer bypassed the BMS and ive been advised to get a new inverter along with compatible batteries to make use of the BMS. I wanted to get 200ah batteries but im having a hard time finding ones compatible with Deye, I was also told with an 8k inverter with a working BMS and 3 100ah batteries I may get close to double the usage im getting at present.

18 hours ago, FixAMess said:

The "C" thing should not be your primary criteria for buying a battery. 

It only becomes an issue when one only has a few batteries, and with current loadshedding having 1c vs c/2 is irrelevant.  One needs batteries to last at least 6 hrs.

With an 8kW inverter, you'd need at least 2x5kW batteries. So in effect you'd drain your battery in just over an hour at 1C. What about the other 4,5,6 hrs of loadshedding?

Also, if you have split your db do you actually need 8kW of power on the non-essential loads?

 

thank you for your response, im not very knowledgeable when it comes to these things if im being honest. I operate a medium sized supermarket and we get all day powercuts some days(morning to evening),our operating times are 7am to 7pm. im replacing an Mercer axpert 5kw inverter and 3 100ah batteries because my last installer bypassed the BMS and I was told making use of the bms would maximise the usage I get so im hoping to pair the 8k deye inverter with 3 of 100ah(or even 150 or 200ah) batteries if I can find good affordable ones that work well with the deye  

17 minutes ago, Joseph M said:

thank you for your response, im not very knowledgeable when it comes to these things if im being honest. I operate a medium sized supermarket and we get all day powercuts some days(morning to evening),our operating times are 7am to 7pm. im replacing an Mercer axpert 5kw inverter and 3 100ah batteries because my last installer bypassed the BMS and I was told making use of the bms would maximise the usage I get so im hoping to pair the 8k deye inverter with 3 of 100ah(or even 150 or 200ah) batteries if I can find good affordable ones that work well with the deye  

Look at the Pylontech UP5000 or the Freedom Won eTower you will need about 3-4 of them.

34 minutes ago, Joseph M said:

thank you for your response, im not very knowledgeable when it comes to these things if im being honest. I operate a medium sized supermarket and we get all day powercuts some days(morning to evening),our operating times are 7am to 7pm. im replacing an Mercer axpert 5kw inverter and 3 100ah batteries because my last installer bypassed the BMS and I was told making use of the bms would maximise the usage I get so im hoping to pair the 8k deye inverter with 3 of 100ah(or even 150 or 200ah) batteries if I can find good affordable ones that work well with the deye  

OK, but you must have an idea of usage per day? You get a bill that will tell you X units in Y days, so X/Y gives some sort of figure for trying to assess needs. 

Also do you want to back up EVERYTHING in the store, or will you exclude things like water heating and that stove? In general, things with hot plates/heating elements use a lot of power, and that's why in homes they are often excluded from what is backed up.

Another few 2c's worth and touching on other comments:

1. Debatable curveball, but I'll say it. You've got lots of fridges and freezers, 8 plus a cold room, that make me think a robust transformer-based inverter could be worth asking about. Victron, MLT, etc. 

2. For the fridges and freezers to run continuously, It's probably more important to increase the number of batteries to increase runtime. C-rating becomes less important. Better to ask how many units of power you use per day that need to be backed up.

3. Are your 5kW inverter and batteries still functional? What is the reason to replace it? if it's still good, maybe consider keeping them for "office" loads like PC's, lights, TV, printer with the option to transfer the Deye's output if needed. And keep your good new batteries for running the fridges and and ovens for longer.

4. If it's an option to install solar panels, that could help to see you through the day especially for the heating requirements of the oven and the warmers, and save the batteries for running the fridges overnight if needs be.

4 hours ago, Nexuss said:

Look at the Pylontech UP5000 or the Freedom Won eTower you will need about 3-4 of them.

thank you for the suggestion, really appreciate it. is the pylontech a better option than the Hubble AM2?

11 minutes ago, Joseph M said:

thank you for the suggestion, really appreciate it. is the pylontech a better option than the Hubble AM2?

Yes absolutely . The AM2 especially is a terrible battery and Hubbles service is just as bad. I know someone that has been waiting for 2 months for a repair and now they wont even answer him anymore. Just look around the forum here at the amount of people struggling with them. Sadly people are still buying them.