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MorneDJ

Victron - No charging from Solar

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I recently installed a small Victron (Multiplus II 3KVA, 6x 365 panels) system at the office, setup with ESS as setup at my house. While it worked OK for a few days, it appears not to use the power from the sun for long periods of time.

It is currently full sun here, as it is working well at my house around the corner.

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Any ideas why or what I can check.

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Posted (edited)

@MorneDJ 
Go to Settings -> ESS 

there should be two values which is important: 

Minimum SOC
Active SOC

What are those two values?

 

If you look at your ESS Notifications it shows #1, #2
#1 = SOC Low
#2 = Battery Life enabled
 

My suspicion is that your Active SOC is very high, above 90%. Active SOC is a value that is automatically set by your GX device, if Battery life is enabled then each day your battery does not fully charged the Active SOC increases by 5%. Each day it gets fully charged your Active SOC decreases by 5%. If battery life is enabled then your batteries will not discharge more than your Active SOC. The above all happens cause your system is trying to get your batteries to 100%. 

From experience, if you change your Minimum SOC the active SOC increases with it, but will only decrease each time the battery is fully charged.

Edited by stoic

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12 hours ago, stoic said:

My suspicion is that your Active SOC is very high, above 90%.

Your answer is spot on, except for the above. The Active SOC limit cannot go above 80%., higher up you can see how this value is calculated. But that still explains his symptoms, since the picture shows 81%, and the hysteresis is 3%. A system where the loads exceed the available PV will discharge the battery up to 80%, then stop and recharge to 83%, and repeat this ad-infinitum until the loads reduce or PV increases.

 

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My Minimum SOC is set to 50%, but for some reason it appears never to reduce below 70%, even at night. My MPPT also decided now not to charge, even though there is nice full sun on the panels with no shade (no shade after around 8:30 AM). For some reason the system did not use solar power between 10:17 and 11:06 (SOC was 80%, full sun) as well as 14:47 - 15:31 (SOC was 73%, full sun). Now it started acting up again. Will continue to monitor.

 

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1 hour ago, MorneDJ said:

MPPT also decided now not to charge

MPPTs that don't charge. First check the remote connecter. I've had three cases now where this thing caused a problem, and it was intermittent too, apparently changes in temperature causes the small copper wire to move just that bit...

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Also always check PV fuses. If all else fails, Victron support can actually look at the data and tell you why it is not charging. The Solar Charger reports an "Off Reason" which is also sent to VRM where support personnel can see it, so if all else fails, ask your reseller to escalate it.

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The MPPT again decided not to charge anything 10:14 - 10:59. Again 45 minutes in full sun. Really weird. Jaco spoke to me yesterday but that connector seems well connected. It is not the same as yours but a little plug.

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Any Warnings? My friend had temperature warning, which was one of the screws where the PV cable connects to the MPPT,  just needed to be tightened up a bit more. His would act out in the middle of the day or when things got hot.. and switch off.

 

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1 hour ago, MorneDJ said:

The MPPT again decided not to charge anything 10:14 - 10:59. Again 45 minutes in full sun. Really weird. Jaco spoke to me yesterday but that connector seems well connected. It is not the same as yours but a little plug.

For goodness sake just send me your VRM url so I can look...

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Thanks Plonkster. It seems that it is more effective and did not go into that "shutdown" mode yesterday. I am stuck in the mountains in Eastern Cape this week, but will try and follow the installation when I have internet. Thanks again. 

How do one update the software/firmware of the MPPT. I could not find that point or place to do that?

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4 minutes ago, MorneDJ said:

How do one update the software/firmware of the MPPT. I could not find that point or place to do that?

Normally via Bluetooth and the VictronConnect App, not sure if you can do it through VRM.

 

 

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1 hour ago, MorneDJ said:

How do one update the software/firmware of the MPPT. I could not find that point or place to do that?

 

1 hour ago, PaBz0r said:

Normally via Bluetooth and the VictronConnect App, not sure if you can do it through VRM.

Make sure this is on (under VRM Portal settings):

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Then on VRM you can find it here:

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1 hour ago, plonkster said:

Then on VRM you can find it here:

My Firmware and VE configure options seem to have disappeared. I checked it seems the two-way communication is enabled. 

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Just now, PaBz0r said:

My Firmware and VE configure options seem to have disappeared. I checked it seems the two-way communication is enabled. 

Reboot the GX. That usually helps. When it comes up it sends a special "announce" message which makes VRM do a few extra things, flushing out old state and so on. Normally it should not be necessary, but I do find that sometimes it helps.

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12 minutes ago, plonkster said:

Reboot the GX. That usually helps. When it comes up it sends a special "announce" message which makes VRM do a few extra things, flushing out old state and so on. Normally it should not be necessary, but I do find that sometimes it helps.

Thanks, worked :)

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