Chris888

Thanks for the explanation all. I had read about the edge of cloud effect but this is the first time I have seen it happen and didn't expect such an increase. @Calvin yes it is an 8kw Sunsynk with one string of 4 panels and another with 5, so definitely got some headroom. I think 9 panels per string would be the max.

Hi, So only had this system for about a month now. Got 9 x 545w Canadian Solar HIKU panels. The max watts I have seen is around 4300. This morning it was pushing over 6000 at one point. The math don’t math. 9 x 545 = 4905. I thought that would be the max under ideal conditions?

Thanks @Bobster. I will keep an eye on the meter and see what it is reporting. Just find it strange because it was sticking on zero and now without changing anything, I see it occasionally goes negative. Weird.

Hi all, I know feeding back to the grid is a big no no. The system is only a week old, and everything has been fine however I noticed this morning when there was very little load, the screen was jumping between 0 and -40W to -50W back into the grid. I checked Solar Assistant and can see the same thing. When the geyser came on so there was a load, it stayed at zero. Also Looking at the totals screen in Solar Assistant I can see yesterday the grid use was -0.1 kWh. Previous to that 0.0 and 0.0. The CT coil is installed, my only concern about it is that it is stuffed in the DB with wires all over it. Although the only wire passing through it is the main incoming Eskom feed. Is this amount of "noise" acceptable or indicate an issue? Thanks!

Hi guys, So I am new to all this and I think this is probably a case of a little knowledge being a dangerous thing but I want to understand better. I have been checking the battery info in Solar Assist for the three AM-5's I have. I have noticed two of them (pack 2 & 3) reach 100% SOC at 55.9V where as pack 1 is only 53.9V. Pack 1 also tends to run about 2 degree warmer, but I think that is just due to it getting some of the hot air exhaust from the inverter. Is this something to be concerned about? Also strangely pack 3 says its capacity is 102.5Ah, did I just score an extra 2.5Ah?

Wasn't sure if I should start a new topic but I was looking at the battery info in Solar Assistant this morning and I see the 1 pack has lower voltage 53.9V at 100% charge. The other two have identical 55.9V. Is this something I should keep an eye on, a possible issue? Interestingly pack three appears to have a 102.5 Ah capacity which is also odd.

Ok, I dropped the Absorption and Equalization V to 55.5V and left the float at 55.2V Happy to be cautious as I would like to look after the batteries as best as possible.

Thanks @GreenFields, I wanted to ask that. To work out the max Amps from the panels is it (545W x 9 panels) / operating voltage ? So 4905 / 41.5 (I think I am looking at the right spec sheet online for these panels) = 118A But that would be with 100 % efficiency so like you said, 95-100A.

@P1000 Thanks. The 58.4V is what Hubble listed as the charging voltage in the little pamphlet that came in the box but will stick with the 57.6V as you suggest. You reminded me about the fuses. I believe they are 160A. With the three batteries connected with equal length cables to the fuses and then even thicker cable from the fuses to the inverter. But the 160A would then be the limit I suppose. I will double check with the electrician on Monday. I just upped it to 150A and the Watts charging the battery went up to around 4000 which seems to be what I am getting from the PV at the moment.

Hi all, Got a new setup which I am still figuring out. Sunsynk 8KW 3 Hubble AM-5's 9 Canadian Solar 545 Panels The AM-5 specs from the website and what came in the box: Capacity: 100 Ah Nominal Voltage: 51.2 V Equalized Charge 55.2 V Charging Voltage 58.4 V C Rating: 1.0 C Max Continuous charge & discharge current: 100A The Sunsynk is picking up the Hubble's, with the following shown under LiBms: I thought that would be that and it would use what the batteries where telling it, however I noticed that my peak charge and discharge from the batteries is only 2100 W. I guess the battery settings still need to be set. It is currently set at Charge/Discharge 40A, which would explain the 2100 W peak. My question is, what are the correct settings? Batt type Batt Capacity is 300 Ah I presume the three batteries in parallel could handle 300A max charge/discharge (What the LiBms also says) but the inverter is only 8KW and from the spec sheet has a 190A max charge/discharge rating. So should I go with 150A Charge/Discharge to be on the safe side? Batt charge Are the Float/Absorption/Equalization V numbers okay? The float V is the same as the Equalized Charge V of the battery specs, but what is Absorption and Equalization V, should those be set to the 58.4V charging voltage? What are the two Amps numbers on the Batt charge screen? I think from the manual it is the Gen and Grid start voltage. I cant edit the first one, is the second one at 40A alright? Thanks!

@Chris_S and @ZCS thanks for the help. Early days. Will keep an eye on the data and make the necessary tweaks. Will probably be back with more questions as well.

Thanks for the clarification. I do have the CT coil installed and as mentioned there is only a large aircon that is not on the UPS side. So if the limit to load box is unticked, spare PV will be sent to the aircon as well, but if there is no grid, the aircon wont work? Do I have that correct?

I only have one large aircon on non essential, but I guess that makes sense to use the PV for that if it is available. How much more PV do you think would be required to go fully off grid? I guess matching the 8KW of the inverter? When a meter/monitor was installed for a week, the max load that was used was 8.8kw and we averaged 16kwh a day. A bit off topic but I have the Sunsynk logger and app but am considering getting Solar Assistant as well. Have you got any experience with it, is it worth the money for the extra info? I do like data 😀

Another Chris 😀 Thanks, that makes more sense now. This is the first day it has been running and the PV managed to supply what was needed during the day. The system first switched on last night so the batteries charged off the grid in the evening and were 100% the whole day today. I have 15kw batteries 5KW PV. I am thinking of just having it set to 40% SOC, no grid ticked, for all 24hours of the day and seeing how that goes. Does that sound alright?

Hi, I have a new 8kw Sunsynk inverter and have some questions about the way the system "Program Charge / Discharge Times Page" works. I have read the manual and this thread, but am still a little confused. Using the screenshot/setup from that thread: Questions relating to a time during the night when there is no PV being generated. What happens when the battery reaches the given SOC, does the inverter just stop supplying power? Take row 1, does it mean between 01:00 and 05:00 the battery is allowed to deplete until 80% SOC and then the inverter stops supplying power? If one had "Grid" ticked on row 1, once 80% SOC is reached, rather than cutting power would it switch to using grid power? Or does it mean that during this time, the inverter will use the grid to supply power unless the grid is not available in which case it will use battery until 80% SOC then turn off? I'm most confused about question 3. I guess put another way, if Grid is checked, will the inverter use battery power until the battery reaches the given SOC and then switch to Grid, or will it use Grid as long as its available and if Grid is not available, will use the battery until the given SOC? How are things different during the day when there is PV available? If you are pulling more than the PV can provide and Grid is not checked, I presume it will take the additional from the battery. If grid is checked, will it then take the additional from the Grid? Thanks for

I am looking to buy three AM-2's shortly to run with a Sunsynk 8kw inverter. However these new AM-5's are now available for not that much more. Should I go for the AM-5's? I cant say I understand the difference in battery chemistry. What are the real world advantages if any? I have read the Hubble Lithium Battery AM-2 5.5kWh thread from beginning to end and am a bit concerned about the AM-2's but as mentioned in that thread, they have sold a lot of them and the firmware has been updated to fix the data issue. Thanks

Hi all, I am new to all this, so I would appreciate some guidance. Just moved into a new house and it came with these three UPS systems. Each one has 2 x 105 AH batteries and the inverters are 600w, 1000w and 1200w. Wife isn't keen on the boxes being inside the house and the inverters are pretty noisy when they come on. I would like to move to a central system in the garage (where the db board is). Are 6 x 105 AH batteries enough to provide backup for the whole house, for a 2.5 hour load shedding situation? I don't expect to be using the oven or air conditioners. The house also has prepaid electricity and we seem to be averaging 15 units a day. If these batteries can work, I presume what I need is a larger inverter/charger? Should I be looking at 2000, 3000, 5000VA? What brands or models would you suggest? I see the Mecer Axpert's advertised a lot, are those decent? I saw another post where someone said Victron was the way to go. Sorry for all the questions but as I said, I am new to all this.