RStone13
Amps X Voltage = Watts
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- Feb 16, 2020
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- 166
If anything, when I change something, it shows in next cycle
Epever 6415AN doesn't respect my settings
- Thread starter jnrhome
- Start date
jnrhome
New Member
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- Feb 2, 2021
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- 108
I find that I can make some adjustments that take immediately. others take days to kick in.
For instance, when in float, I can adjust float voltage up or down and see it ramp up or down almost immediately.
However, when in float, the boost recon voltage changes don't seem to matter at all.
What stage the cycle is in and which changes you make really matters.
For instance, when in boost, no boost voltage change alters performance at all. The old setting is used until the boost cycle completes, even across multiple days. The new setting is ignored until the old setting is met. Once you hit the old setting and complete a float cycle, then it honors the new setting. I've struggled with this for weeks.
The upper charge limit is also a bit intermittent as I've set the max voltage from 54v to 58.40v and the controller always seems to exceed it, however temporarily. Yesterday, I was at 57.00v max and the controller spiked at 59.6v before coming down. I think the max voltage is more of a guide than a hard max as i have seen it overrun in all modes. The overrun is normally quite short in duration, then the charge controller ramps down and rebuilds to something less than max. Most often, I see it when in float and a passing cloud drops the current for a moment. Upon going by, the burst of sun cranks up the current and goes right by the max voltage for 15-60 seconds until the controller reacts.
For instance, when in float, I can adjust float voltage up or down and see it ramp up or down almost immediately.
However, when in float, the boost recon voltage changes don't seem to matter at all.
What stage the cycle is in and which changes you make really matters.
For instance, when in boost, no boost voltage change alters performance at all. The old setting is used until the boost cycle completes, even across multiple days. The new setting is ignored until the old setting is met. Once you hit the old setting and complete a float cycle, then it honors the new setting. I've struggled with this for weeks.
The upper charge limit is also a bit intermittent as I've set the max voltage from 54v to 58.40v and the controller always seems to exceed it, however temporarily. Yesterday, I was at 57.00v max and the controller spiked at 59.6v before coming down. I think the max voltage is more of a guide than a hard max as i have seen it overrun in all modes. The overrun is normally quite short in duration, then the charge controller ramps down and rebuilds to something less than max. Most often, I see it when in float and a passing cloud drops the current for a moment. Upon going by, the burst of sun cranks up the current and goes right by the max voltage for 15-60 seconds until the controller reacts.
jnrhome
New Member
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- Feb 2, 2021
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After quite some time, I've finally gotten the controller stabilized at the settings i wanted. Using a narrow range of boost, float and boost recon voltage settings and a short boost duration, this configuration boosts from initiation in the morning until 53.78v. It spends 10 minutes there then floats during full sun. If my load surges for more than a minute or two, or a cloud goes by and reduces the current for more than a minute or two, the controller drops back to boost for at least 10 minutes. The voltages have an added .16v increase from 53.60v to compensate for the difference in voltage between what the controller thinks, and what is measured directly on the cells. In full sun float with a steady load, the battery pack rides along perfectly at 53.6v, measured at the cells. A small cloud or short surge in load will not affect the mode and the system continues to float. A large cloud or extended surge in load drops the system back into boost and it quickly recovers the voltage, then returning to float. I have granular control of just how long i can go under reduced current or increased load without leaving float. I've also managed to keep the max voltage well under the limit.
I think this configuration will allow a greatly extended cycle lifespan and the charge cycle is running consistently at no more than 90%SOC at the top, and from 10-70%SOC at the bottom with the average around 50%SOC. It also allows the CC phase of the cycle to track in the graph, real time, instead of counting down a fixed amount and hoping that got it done.
I think this configuration will allow a greatly extended cycle lifespan and the charge cycle is running consistently at no more than 90%SOC at the top, and from 10-70%SOC at the bottom with the average around 50%SOC. It also allows the CC phase of the cycle to track in the graph, real time, instead of counting down a fixed amount and hoping that got it done.
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Shadeyman
New Member
Hi..
Could you upload your settings, the settings can be exported and saved as a text document.
I have the same controller, considering upgrading to Lithium. Would like to look over your settings before commuting to a Lithium upgrade..
Since your last post in April, I suspect your enjoying life these days rather than obsessing over your Epever SCC, but just in case you’re still monitoring this thread, I’ve finally gotten my AN6420 hooked up and have a couple questions for you:
Did you ever end up with a divinities conclusion about which settings change behavior immediately and which only after a delay (either a full reset, overnight delay, or completion of a charge state or cycle)?
I’ve gotten charging pretty much working but realize I’ve probably never been out of boost mode so far, do it may be too early to declare victory.
On the other hand, I’m attempting to use the generator relays and have been frustrated that my changes to Vuvw and Vuvwr seeming have no effect.
I remembered something about changes to settings/parameters sometimes not taking effect until the next day and so dug up this old thread.
Anyone understanding how settings changes are implemented in Epever AN SCCs in general or how to change Vuvw and Vuvwr settings to activate generator start relay, I’d appreciate any pointers.
Pretty impressed with the AN6420 itself but the documentation is worse than piss-poor…
pollenface
Solar Addict
Similar thing happened to my 4210AN.
I ended up setting the charge limit to the same as the Boost voltage, which worked (with equalization turned off).
corporate.joe
Solar Enthusiast
- Joined
- Jan 25, 2021
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- 174
I hope this isn't considered a necro of this thread. But related to changing settings on Epever charge controllers... I am communicating with mine(4210an) using a rs485 adapter plugged into a Pi then sharing that port to a windows box running the epever solar monitor software.
When I wanted to change the port settings(to 9600) and the ID#(2) of the unit those settings could be written but would not take hold. Neither of the settings took effect until I powered off the unit disconnecting it from the panels and then the batteries. After bringing it back up those settings were finally being used. Mind you the software reported those settings were changed when I read them from the unit(using 115200bps and ID1 to my chagrin), but the unit would not actually communicate at 9600 and ID2 until it was rebooted.
So, some other settings may require a reboot of the controller.
Joe-
When I wanted to change the port settings(to 9600) and the ID#(2) of the unit those settings could be written but would not take hold. Neither of the settings took effect until I powered off the unit disconnecting it from the panels and then the batteries. After bringing it back up those settings were finally being used. Mind you the software reported those settings were changed when I read them from the unit(using 115200bps and ID1 to my chagrin), but the unit would not actually communicate at 9600 and ID2 until it was rebooted.
So, some other settings may require a reboot of the controller.
Joe-
Went thru this thread...interesting dealing with the Epever controller - I have a 3210AN, mobile application. (RV)
I have a couple of profiles based on whether we're using the unit or it's in storage. Lower settings for the latter, obviously.
After floating for a week I noticed it had kicked into boost mode, I think the battery finally hit the recon voltage and started the boost cycle.
But here's the kicker - panels are 2S which generally put out about 42V. Today the controller was reading 14.1V and amps were pretty low too. Put a DMM on the contacts and sure enough, 14V. So I shut the panel disconnect off and reconnected, and voile - full volts again. Any ideas what's happening there?
I have a couple of profiles based on whether we're using the unit or it's in storage. Lower settings for the latter, obviously.
After floating for a week I noticed it had kicked into boost mode, I think the battery finally hit the recon voltage and started the boost cycle.
But here's the kicker - panels are 2S which generally put out about 42V. Today the controller was reading 14.1V and amps were pretty low too. Put a DMM on the contacts and sure enough, 14V. So I shut the panel disconnect off and reconnected, and voile - full volts again. Any ideas what's happening there?
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