JohanB

Ok thanks. Yes, the current limit, was the concern from the onset, I was afraid I would reach it with series so parallel I will most certainly exceed the 11A limit.

Thanks good explanation. I think I am going to do 8 * 410w panels in series runs will be short.

Hi, I don't want to split it, I was just wondering what would be best. I was thinking if there are two inputs would it not be better to populate both, for performance or optimisation. If there is no benefit obviously sticking to one string would be easier and as you say to expand later I will just add a string.

Thanks, So what you are saying is that the 410w panels would not exceed the current limits if I do 8 * 410. I'm in pta. And secondly if I understand correctly putting 8 on one input is beter or equal to splitting 4 over the 2 inputs? I was wondering if 4 panels would fall under the minimum.

Hi all, I have a query I am planning a hybrid system with a Deye/SunSynk 5kw inverter. I see on the stats it has 2 mppt trackers rated at: Max. DC Input Power (W): 6500W. PV input Voltage (V): 370V (100V-500V). MPPT Range (V): 125-425V. Full Load DC Voltage Range: 240V-425V. Start-up Voltage (V): 150V. PV Input Current (A): 11A + 11A. No. of MPPT Trackers: 2 No. of Strings Per MPPT Tracker: 1+1. The panels I am looking at is wired in series (I have a open roof no shading and the lower current is better from what I have read): 410W Canadian solar PMAX: 410.0W VMP: 39.10V IMP: 10.49A VOC: 47.60V ISC: 11.06A So what I want to know: 1) Would it be best to split the panels over the 2 controllers or will it not make that big of a difference? (ie. 6 panels on one tracker or 8 (4*2) over 2 trackers) 2) Would 4 panels per tracker work? Voltage is what concerns me? 3) The ISC is rated at 11.06A would this be safe on the 11A input of the inverter or should I be looking at the IMP? 3B) if not can someone recommend a better suitable panel. I want to maximize the amount of watts on the roof now seeing as the installation cost is not that much more for a few more panels, but still staying within a budget. Thanks.

Yep even me! It does still come in handy to have the background knowledge of things like hex. Think today it might be a lost art.

Great info will keep that in mind!

Yes, this was indeed a huge help, understanding number systems, and endian-ness. I remember the days before Arduino's when I first started to mess around with micro controllers, PIC16's having to print out a datasheet with the instruction set, and code the thing in Assembly. Not that I would go back to that using the Modern IDE's and high level languages makes things allot easier. 🙂 Amazing, exactly what I was looking for a great start, now I just need to populate the values with "real" values.

Wow Today I learned! Never too old to learn something new hey. Very interesting thread... Also as an aside. @plonkster I have manged to decode the Arduino sketch, you provided me in the other thread. 023a 570 Charge Voltage: 57V 0064 100 Max Charging Current: 10A 0064 100 Max Charging Current: 10A 01a4 420 Discharge Voltage: 42V 0032 50 SOC 50% 0064 100 SOH 100% 0000 0 SOC high definition 0 * 0.01% 14b4 Battery Voltage: 5300 * 0.01V = 53V 0064 Battery Current: 100 * 0.01A = 10A 00f0 Battery Temp: 240 * 0.1c = 24c These values look familiar/correct? So in essence my idea is to make a "smart" module for any "dumb" BMS like the Daly. The current version will not have individual cell reporting, however it will have Bluetooth and Wifi, probably MQTT and CAN-Bus support. Anyway sorry to derail the thread. /me drops ninja dust...

I could not find a price for a SunSynk, but I found the Deye https://www.solarpanelenergy.co.za/p/958862/5kw-deye-hybrid-inverter it was listed as R 21850.00 (dont know if it is a good price). If someone has a good price on a SunSynk in South Africa let met know, so we can compare. I would assume a Victron system would be quite a bit more?

Does anyone know if the Deye's and SunSynk's are identical, firmware etc... I have been looking at this one: https://www.solarpanelenergy.co.za/p/958862/5kw-deye-hybrid-inverter

Thanks will look into it. If I recall correctly the sunsynk is a Deye? this is actually one on my list...😀

Great explanation makes a whole lot more sense now... So the real answer, as with so many things, is it depends. At this stage I think implementing a compatible can-bus interface seems like a better option... By reading here and doing research elsewhere I understand it as you refer to it as a “true hybrid” but it is so confusing as sellers of the equipment and by extension the manufacturers, refer to it as Hybrids. I found a neat trick is to use the City Of Cape town’s list of approved inverters as they list only true hybrids. and grid-tied.

Yes I ordered a pre-built unit, so it includes a 120A BMS all the necessary protection but no Comms. so My idea would be to build or buy a way to do comms.

Exactly what I was wondering about. If they are stating can-bus and they mean rs485...