Sunsynk (DEYE) Hybrid Inverters

If you are having to run a new cable, just run a 10mm² armoured cable. No matter what you do then, you're sorted.

Suppose you don't have enough time in a 3 or 4 he window, you may end up adding a secondary battery charger in parallel with the inverter.

I've a 3kW rectifier which can add up to 9kW in the 3hr window in addition to what the inverter can do.

Its so simple, very clever setup. I hated the rectifier idea for charging the batteries as I assumed it required some form of automation and would act as another point of potential failure. The voltage output being set just below the inverter voltage (& max battery voltage) is very creative. Are there any practical downsides to this approach compared to say using a more poweful inverter?

While it starts delivering at 3kW, if it's voltage setting is less than the inverter, then it will gradually reduce as the battery charge increases. So you don't end up pulling the full 3kW for long.

It's possibly a case of buying a good brand of smart plug, rather than a cheap AliExpress one. I bought a TAPO on Amazon

It's mentioned earlier in the thread, but you need to be mindful of the open circuit voltage of the panels in series. 450v is the max per string the power output is less important. I think 12/13 panels per string in series is probably pushing it for the 6 or 8kw Deye.

You need to find the spec sheet for your panels to determine their Voc and also figure out how they are configured e.g. Is it two strings in series one 12S and the other 13S or do you have a bigger imbalance between them or even some paralleling?

To give full context I wish to install a 30Kwh battery (spec attached) into my existing solar power setup at home. Here's a quick overview of my current setup:

I have 16 x 360W (VOC 40.8) panels installed on my garage, which are connected to a 6KW Solis inverter. These panels are arranged in two strings with 8 panels each. Additionally, I have 9 x 370W (VOC 41.2) panels on my house, connected to a 3KW SAJ inverter, and these are on a single string. I monitor and control the system using myenergi products (Hub, Harvi, Eddi, Zappi). Unfortunately, both of my current inverters do not support battery connections.

Given this setup, I am considering two options and would appreciate your guidance on which one might be more effective:

1. Replace the inverter in the garage with a Deye 6 KW Hybrid inverter while leaving the SAJ inverter in the house as is.

2. Join up all the panels (they are close, so this can be easily done) on two strings (12/13) and connect them to either a Deye 6 KW or 8 KW Hybrid inverter.

Pictures of current set up, spec of 30kwh battery and Deye 6kw and 8 kw inverter attached. 

Consider connecting the second inverter to the Deye Load port. Then the Deye can export while knowing about all solar generation

If I connect up all 25 panels is there any benefit going with the 8kw inverter or will I stick with the 6kw

I'd read the inverter would use frequency shifting to stop the gen port inverter from exporting and this along with the missing allow export from micro inverter had me park the idea for now.