Hello, I purchased an EP 500Pro to install on a yacht along with 1200 Watt PV panels.
The boat has a Cummins generator installed, model 4MDKBH-59333 - marine version 4000VA 230 V.
The solar panels charge the EP 500, but not enough for the entire electricity consumption of the boat. The battery needs to be recharged through the generator.
The problem appeared when I started the generator, which is connected via the original AC input cable to the generator output.
The EP 500 Pro registers the presence of the Grid, but does not start charging. After a few seconds, charging begins and reaches the current set in the menu, but only for a few seconds and then turns off charging again. This process repeats itself at random intervals.
I suspect that the EP500 Pro probably does not like one of the parameters of the generated voltage.
However, I measure, and the EP 500 also shows me on its display that the frequency of the voltage from the generator is between 49.6 to 50.05 Hz. The voltage is between 228 to 237 V
Everything seems normal and the EP 500 turns the charging on and off constantly.
The generator is very stable and I only connect the EP500 to it at 7A, which is about 1600 W .
Please tell me what the problem is in your case. I have worked with other UPS for servers and I know that some models can be adjusted for less sensitivity to inaccuracies in the supply voltage.
I updated all the firmware through the application.
No result.
Hi @anton_obretenov, We truly care about the issue you’re experiencing.
Could reducing the input current help resolve this? Additionally, we’d like to know:
Are there any error messages during charging? If so, what is the error code?
Is the EP500PRO able to charge normally from the grid?
We’re concerned that this generator might not be compatible with the EP500PRO. To assist further, please provide the device’s SN number and the current firmware version
We’ll attempt to push a firmware update to address the issue.
Hello,
unfortunately I’m no longer on the boat and will be there in a month.
Before I got off the boat I took a screenshot of my phone screen through which I updated the firmware. I’ll attach it. I have a screenshot of the display of the incoming power parameters from the generator.
There are no alarms or errors!
I noticed that when I returned to shore and switched the power supply to the one on the dock, a normal charge began for about 1 hour. Then the charge was turned off before the battery was 100% charged. I immediately understood the reason. There was apparently a momentary overload at the dock and the voltage had dropped to 204 V. Apparently this was not OK for the EP 500 Pro and it temporarily stopped charging. This provoked me to do a more accurate test with the generator. I noticed that the generator voltage is constantly around 235 to 237 V. When the EP 500 Pro was turned on for a second or 2 the voltage from the generator jumped to 241 - 242 V and the EP 500 turned off the charge immediately.
Probably the problem is with the voltage. Unfortunately I can’t adjust the voltage from the generator down. Also changing it will be very difficult. If you think it is not dangerous for the EP 500 we can try with a firmware that will expand the voltage range to solve the problem
Hi @anton_obretenov, Thank you for the detailed information. We believe that the new firmware should be helpful.
Now I have applied to upgrade your system to our IT department. They will push the latest version of DSP firmware to your unit in 24 hours.
Please upgrade the firmware tomorrow. Please do not load any device when upgrading it.
Please let us know if it works.
By the way, please note that if you need my assistance, please @BLUETTI_CARE, otherwise, I might not see your message and be able to help you promptly.
Hi Bluetti,
@BLUETTI_CARE. Did you resolve this problem Anton is having. I have a very similiar problem to Anton. I have an EP760 with a single B500. It runs an off grid system for my fixed wireless internet system in Australia. There is no grid available and a constant load of approximately 70W. There is 1.5kW of solar connected to the EP760. Occasionaly when it cloudy for a few days I need to run a generator. The generator is a 2000VA pure sine wave generator wired into the grid input of the EP760. However I have the same syptomns Anton describes. The EP760 pulls power from the generator for a few seconds then cuts off for a while, then pulls power again then shuts off again. Interestly the consumption shows a relatively large rising load while it is pulling power of more than 800W, when the actual load is less than 100W, like it is trying to start some internal power using process.
I already have Pro mode access to my device. The charge from grid settings are set at a maximum of 250W and 2A. Any higher for these values and the apparent internal EP760 consumption overloads the generator. Feed to grid is disabled. The “generator” and “grid self adaption” settings are enabled. The authenication settings are set to Australia A and are all default. DSP version is v5022.18. ARM version is v5023.21. Do you have a resolution to this issue?
Regards
Tim West
Hello, in a few days I will be at the battery and will be able to do the firmware update that Buetti has prepared for me.
I will write the result.
Hi @timwest73, We are more than happy to assist you.
Before that, could you please provide the SN code of your EP760? We will then look up a solution for you promptly.
Hi @anton_obretenov, Thank you for your update. We expect your test results.
We hope everything goes smoothly from here!
Please feel free to contact us if you need our help.
Hi @timwest73, To address the current issue, please follow these steps in order:
First, disable Grid Self-adaptation mode in your settings.
If you don’t have a CT connected, please set the CT current to “None”.
Disconnect all loads from the unit.
Then attempt to charge the system.
Finally, switch your regional/country setting to Standard mode.
We’ve attached a reference screenshot to help guide you through these adjustments.
Please let us know if this resolves the issue.
We’ll continue working with you until this is fully resolved.
Hi @anton_obretenov, Please note that after upgrading the firmware, you need to update the app to the latest version, enable Grid Self-adaption, and then conduct the test.
Enabling Grid Self-adaption allows the device to better adapt to the power grid environment, ensuring the accuracy of test results. If you encounter any issues during the operation, please feel free to let us know, and we will fully assist you.