SuperCwazy

Please try Deye Cloud app. It works great

Hi, I know this is an old thread, but just thought I'd add my 2 cents, hoping it will benefit others.
I'm kinda new to solar/inverters. Got my Deye inverter installed just under 3 weeks ago. 8kw inverter, and 4× hubble am5 batteries. Sounds like overkill, but figured I'd just bite the bullet, since it's best for the long run. Deep discharge cycles dramatically reduce the battery's life expectancy. If you can keep the battery between ~50% and 100% charge, it works wonders for longevity. 
Once you start draining your batteries deeply, it starts a vicious cycle, of needing to continuously deep-drain your batteries, as each deep discharge, will decrease capacity.
Just thought I'd put this out there.
What I really wanted to mention, is regarding those "grid charge" checkboxes, on the "work mode timer". 
Let's say your battery is at 81%, and there's no load shedding. When it drops to 80%, the grid will maintain the 80% charge. So long as there's no load shedding, throughout the night, given that you set the state of charge at 80% throughout the night, the inverter will use grid power to maintain that 80% charge.
But let's say there's load shedding from 20:00 to midnight, and let's assume that your battery was on 90% before load shedding commenced at 20:00. By the time it's midnight, and load shedding stops, your battery level might be around 65%. So when grid power is back, it will maintain that 65% charge. It won't recharge the battery back to 80%, because the "grid charge" checkbox, isn't ticked.
But if the grid charge checkbox was ticked, at the 00:00 to 04:00 time slot, then your battery would have been charged back to 80%, and the inverter would maintain that charge, until either another load shedding session, or your solar panels kick in, in which case, your battery will be charged back to 100%.
So it's all a balancing act. I'm still tweaking my timer settings, but I'm getting the hang of what works for my household. When winter sets in, and we start using heaters, that will be the real test, since the ladies don't wanna use gas heaters. But 800w bar heaters, used intermittently, should be manageable enough.
Here's how my timer is currently set:
01:00 to 05:00   65%  grid charge
05:00 to 09:00  55%  grid charge
09:00 to 13:00  60%
13:00 to 17:00   65%
17:00 to 21:00   70%  grid charge
21:00 to 01:00   65%  grid charge
 
It's set to basically never need to grid charge at all, but if for some reason, the battery percentages do drop below the limits I set, the grid will only need to charge them for a very short while, till we enter the next time slot, and the battery again begins to discharge.
Recently, we had a load shedding slot from 04:00 to 06:30, where the battery level dropped to 48%, hence I set the grid charge, for the 05:00 to 09:00 time slot. It's Ramadaan right now, so we wake up before sunrise, use the microwave, kettle, etc. So there's some significant battery drain in those early hours of the morning. 
Basically, I just need to grid charge to maintain a certain percentage, until sunrise, and the solar kicks in, then I'm generally back to 100% charge by midday, if the sun is shining. My inverter is set to prioritise the load, before charging the battery.
It's just around 23:50 as I'm typing this, and the battery level is at 75%. I'm hopeful that there will be no need to grid charge at all, throughout the night, but it's generally a close call, around 6AM. The battery might near the 55% mark around that time, but I'm hoping it will still be above 60%, in which case, I probably won't need to grid charge at all, until the solar kicks in, God willing.
Sorry for typing so much. For what it's worth, hope whatever I said is helpful. 

Thanks for the link. I was actually just reading up more about this last night, and realised that LiFePO4 batteries are actually quite a game changer, and far less impacted by deep discharges, compared to other lithium ion chemistries.
That being said, even with LFP batteries, they still give a much longer cycle life, if not discharged too deeply. If you keep them above 50% SOC, you can effectively triple their cycle life. 
I came across some interesting info in this regard, on the BSL battery website, but couldn't find it when I searched for it again. But basically, they encouraged shallow discharges, as the cycle life increases exponentially, the shallower the discharge cycles get.
At 30% DoD, you get insane longevity, but at the cost of practicality. I think keeping your DoD at around 50%, seems to be striking a good balance.
We actually had a power outage today, with no grid power from like 3pm to 9pm, so I keep learning more, what works best, as we go long.
These are my amended timer and battery settings. Hopefully I've found the sweet spot now, where I can just let things be, without needing to do any further tweaking.
01:00 to 05:00   50% grid charge
05:00 to 09:00  50%  grid charge
09:00 to 13:00   50%
13:00 to 17:00    60%
17:00 to 21:00    70%  grid charge
21:00 to 01:00    60%  grid charge
 
Restart  35%
Low battery  30%
Shutdown  25%

Hey guys, I found a really interesting article which isn't too technical, makes for rather easy reading, and is perfect for the layman to understand. 
https://www.solacity.com/how-to-keep-lifepo4-lithium-ion-batteries-happy/
 

Unfortunately, there's no way to limit the SoC, when charging with solar, as far as I know. I was interested in exactly the same thing. Was hoping to let my batteries charge to 90% only.
But if you've got multiple batteries, letting them charge to 100% is a good thing, since it keeps them balanced. 
In SA, as far as I know, we can't sell power back to the grid. At least not here in Joburg. Perhaps Cape Town is an exception? I highly doubt it though. I don't think we have the infrastructure for that.
Would be cool if we did though. The bulk of our solar production, for the better part of the afternoon, is totally wasted. 

That article seems to be mainly focused on NMC chemistry and the info does not seem very accurate when comparing cycles. I would recommend actual research papers for proper information. Here is an example.
https://iopscience.iop.org/article/10.1149/1945-7111/abae37

Thanks for sharing a great link. This was my reference in another post but I could not find it when looking on the Web site. 

While lithium ion batteries can be consistently drained all the way to 90%, they don't like deep discharges. Frequent charges, keeping them around the 50% capacity mark, is best. 
I might be new to inverters, but I've got years of experience with lithium ion batteries. To give you a practical, real life example. We got a UPS device, just around 4 months back, to power our WiFi router during load shedding. Initially, we got a solid 3,5 hours out of it. Prior to getting the inverter, we were getting no more than 2 hours out of it. It's a LiPo, and while they're designed for long service life, those stage 6, four hour load shedding cycles, caused it to deteriorate very quickly, since it was being fully drained.
I can give you many examples, even with lithium polymer inverter batteries, since I have friends and family who've been using them for some time. Deep discharges cause them to lose capacity very quickly.
Please give this a read.
https://batteryuniversity.com/article/bu-808-how-to-prolong-lithium-based-batteries