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Kodak OG-Plus 5.48 (King) not using Solar for loads


Alex vZ
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Hi, thanks for the registration.

Recently bought a Kodak King Inverter and connected it to 2 x Jinko 465W panels as a start (the Inverter needs between 60V and 115V and with the 2 panels we are around +-100V max).

We have set the 01 settings to SUb (Solar first), however, the inverter does not use the available PV energy for the loads but uses the grid instead. The only way we can get it to use solar is when we manually switch off the mains or when the battery is being charged but when the battery is fully charged no PV is used for the loads.

I have read the SUb setting from the manual probably around a 1000 times and it is clear the inverter is not working as it should. SUb: "Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, utility energy will supply power to the loads at the same time. Battery provides power to the loads only when solar and utility is not sufficient".

Has anyone maybe come across the same problem or does someone possibly have a King Inverter and can test the SUb setting? The only other setting that has been changed is 05 Battery type: PYL since we are using a Synapse (Pylon 3.55kwh). The inverter is working in line mode and not being bypassed but we tried that as well.

Thanks

Screenshot_20210430-102005_WatchPower.jpg

20210430_110115.jpg

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@Coulomb looks like you are the go to guy. Hope you can share some knowledge pretty please

In a nutshell, when the battery is fully charged the inverter uses grid power for the loads and 40watt from the battery if in bypass mode and 100watt from the battery if in line mode. I guess this is to have the quick transfer time (0-40ms).

No power from the solar panels is used for the loads when the battery is fully charged and grid is on (confirmed with multimeter, no current flowing through PV cable). When I switch off the grid only then does it use power from the solar panels for the load

Have you seen this before?

Looking at other posts, this King inverters software looks to be the latest. Is it maybe this latest firmware/software that is buggy or is the inverter possibly faulty?

Screenshot_20210430-111431_WatchPower.jpg

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5 hours ago, Alex vZ said:

Looking at other posts, this King inverters software looks to be the latest. Is it maybe this latest firmware/software that is buggy or is the inverter possibly faulty?

71.97 is the latest main firmware that I know of. Earlier firmwares certainly had the problem of not using panels for loads when the battery was full.

My guess is that it's removable display firmware; I just uploaded the latest I know of (02.66) yesterday. Annoyingly, the app doesn't display the removable display firmware version; can you tell us what it is (U2) from the front panel?

You have presumably seen your panels charging the battery when it's not full; that would indicate that the solar charge controller is working (just not instructed to provide any power). If you're not set up for removable display firmware flashing (you need a compatible USB to RS-232 adapter, for example), you could temporarily revert to USE battery type, and use the settings in this image.

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02.66 is what it has so no luck there (attached image).

You are definitely correct with the presumption. We had a new form of Load shedding from Eskom, they call it "Load Reduction" now which means the mains were off for 4 hours this morning. I closely monitored what the inverter is doing. It uses the battery from 100% down to 99% for the loads. Then it uses solar energy for the loads as well as solar energy to charge the battery to 100%. Then it repeats the process, so the SCC definitely works just, as you say, not instructed to provide power when mains is available and the battery is fully charged. This is with setting 05 set to "PYL"

Have you seen the panels being used for loads even when the battery is full on the latest firmare? Maybe this has not been fixed yet but I have not come across another post saying the same

We thought about doing 3S but this would bring us above the 145 V I believe ( currently around 103.9, adding another would bring us to 155 V if my calculations are correct and higher when it is hot)

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6 hours ago, Alex vZ said:

Have you seen the panels being used for loads even when the battery is full on the latest firmare?

Not personally; I thought others had.

6 hours ago, Alex vZ said:

We thought about doing 3S but this would bring us above the 145 V I believe

Yeah, 3S would be bad.

6 hours ago, Alex vZ said:

bring us to 155 V if my calculations are correct and higher when it is hot)

Actually, higher when it's colder. Current increases with temperature, but voltage decreases faster.

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  • 1 month later...

Hi do you have any update on this issue?

 

I'm having exactly the same issue with my kodak King inverter, when its running in "Line Mode" it does not use the "PV" to supply the Load as needed, "PV input" stays somewhere between "70w to 144w" and i have 8 x 365w panels (4 string of 2 panels in series), even when increasing the load the "PV input" stays in the "70w-144w" range when in line mode

 

but as soon as the inverter switches over to "Battery Mode" the "PV input" increases according to the load, 

 

Tested it with a hair dryer on "Battery Mode" and the "PV input" increased to "2.5Kw"

did the same test in line mode but "PV input" stayed at "90w"

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Hi, yup sorry bud, I have given up trying to get it to work. The manual blatantly lies about its capabilities. Had a lot of arguments and even returned it to Solar & Inverter Warehouse in Joburg and they told me they would replace it. They gave us the the exact same one back with the same serial number and it still did not work. Some of these guys are only out for a quick buck (it is probably going to get worse with all the loadshedding) and don't care about the rubbish they sell you (quite arrogant about it as well). Last message the one guy that was helping out a little at least told me he would discuss a refund but still have not heard from him. I left it because it was not worth my time anymore.

Anyway, the best I can do is to tell you to run it as follows:
    Output source priority - SBU (not SUB)
    Operation Logic - Auto
    Charger source priority - SLB UDC (if you do not want Utility to help charging the battery)

This should then use Solar when available to charge the batteries and to supply the loads and if the solar is not enough then it will dig into the battery supply. When the battery gets to low for my taste, I switch it over to ECO (bypass) mode. The inverter seems to use 40watt when in Eco mode and 100watt when in line mode.

In case you are using a PylonTech battery, also made some changes there suggested somewhere on this forum about the voltage settings. When "Pylon" was selected as the battery type it constantly cycled it between 99% - 100% which I was not a fan of. The battery does not count it as a cycle each time it does that (not sure how they determine when it actually cycled) but still it was a bit weird

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Forgot to mention that if you plan to argue with your supplier then they may throw the "it is an off-grid inverter" in your face. Firstly and mainly, the manual advertises capabilities which the inverter can not do irrespective of the off grid excuse. Secondly, from what I have seen, the general consensus seems to be that an off grid inverter is exactly that, "off of the grid" i.e. no utility input whatsoever which this one has therefore not off grid

Hope you come right, as you can see not very happy myself with my experience

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This is a bit similar to what i had posted earlier on on the forum. I am using a Kodak OG 3.24 and i thought there was something wrong with my system but after a little research i found the answer to my question. These inverters are not PV inverters and will top up from utility or battery depending on what was selected (SUB or SBU). They are designed to supply from mixed power source.  Another thing i have also noticed from my inverter is that if the load is very low it would rather use the secondary source which can either be battery or utility and balance the battery later. All in all i wouldnt worry so much but you would do well to recheck the back to grid voltage as well as the back to discharge voltage.

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  • 1 month later...

Hi Guys,

I have installed 2 x Kodak OG3.24 at 2 separate locations.

One is working fine it is using PV to power loads, the second is not.

Only difference is firmware the one working well has older version of software.

Any suggestions?

 

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18 hours ago, Ernst said:

Only difference is firmware the one working well has older version of software.

What are the versions that are and are not working? There have been several new versions of late; the latest main DSP firmware version I've seen is 41.17.

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  • 2 months later...

Thought I would share a "fix" I have found for this issue.

I have the Synapse King 5w inverter and it does the exact same thing when in SUB mode - it would work 100% fine and utilize all the available solar power for days on end and then all of a sudden for no apparent reason it will stop using solar for the load and only use about 50-60watt to keep the battery full. Once this happens it is stuck in this condition and it seems like there is nothing you can do to get it to work again. If you switch off utility power it immediately uses all available solar power, but the minute you switch utility back on it drops down to 50-60watt again.

The only way I have found to get back to normal operation again is to do a factory reset on the inverter settings and then enter the exact same settings you had before. As soon as I do the reset and change output priority to SUB, it starts working as it should again, every time.

 

 

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12 hours ago, ccronje said:

The only way I have found to get back to normal operation again is to do a factory reset on the inverter settings

That sounds like the Solar Balance parameter (which can't be changed by a setting in most firmwares) is inadvertently getting cleared. But in two King firmwares (71.92 and 71.97), the solar balance setting isn't used. The global variable is still there, and it can still get set by resetting to factory default settings, but it doesn't seem to affect solar power use.

But perhaps the Synapse King is a clone, and uses some very old firmware, or firmware different from the Voltronic Kings.

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  • 7 months later...

Hi. I recently bought a Kodak OG plus 5.48(king)with Kodak FL5.2 battery. The inverter only uses solar as output source priority until the battery is fully charged. It switches off the solar source and start using the battery until the SOC reaches  +_ 95%. It then switch back to solar and repeat the process. Tried to reset, but no change. U1 is 72.00 and U2 is 2.66. Setting 2 is SUB. Battery setting is PYL. Panel configuration is 2s4p(335W). Any solution to this problem?

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1 hour ago, Machiel said:

Hi. I recently bought a Kodak OG plus 5.48(king)with Kodak FL5.2 battery. The inverter only uses solar as output source priority until the battery is fully charged. It switches off the solar source and start using the battery until the SOC reaches  +_ 95%. It then switch back to solar and repeat the process. Tried to reset, but no change. U1 is 72.00 and U2 is 2.66. Setting 2 is SUB. Battery setting is PYL. Panel configuration is 2s4p(335W). Any solution to this problem?

Hi Machiel. What is your current value for setting 12,13 and 16?

Edited by ccronje
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This inverter is used off-grid so there is no utility power available. I only use a generator to charge the batteries if needed. I had setting 16 on SLb UCb and had seting 2 on USB. It makes no difference. Switches the solar source off and use battery power as soon as the battery is fully charged.

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Hi. I have not. I want it to work as follows: Solar panels must power the loads if available and charge batteries. When solar power is not enough it must use battery and solar power. My generator starts automatically when battery power drops below 20%(controlled by Victron bmv). The utility(generator) must then power the loads together with available solar power and charge the battery until full. So it should be on USB or SUB. The installation worked fine with my old mks inverter and lead crystal batteries. I will try setting 2 on SUB and 16 on SLB UCB for interest sake to see if it makes any difference. It seems as if the inverter can not supply solar energy directly to output as stated on the manual? 

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8 hours ago, ccronje said:

Have you tried setting 2 on SBU with setting 16 on SLB UCB?

Problem with SBU setting is that it will not use the utility when the generator is on, until battery reaches setpoint 12. It must always use the generator power when available. 

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Tried it on SBU SLB UCB, but does exactly the same. Seems that it keeps on using solar as output source at 100% battery, as long as the load is high(it was at 1.6kW), but as soon as the load dropped to 260W it switched the solar off again on 100% charged battery.

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