After almost daily use on a month long camping trip the mppt stopped working and input just flashes.
100 watt harbor freight solar panel. Confirmed still working and charging a Flooded Lead Acid Deep Cycle 100ah just fine with a range of 3-5 amps.
Unable to charge using car charger verified 14.4 volts.
Do not have access to charge via AC and do not have access to a pure sine wave inverter only a modified sine wave.
Day before the battery percentage was stuck at 72% then popped right to 100%. The mppt was charging and doing the minimum input that it normally did when the unit was at 100%. Next morning the unit was at 28% after running a small fridge all night. When I plugged in the panel that is when I got the input flashing and low voltage alert.
Unit is now completely discharged for a bit before it was complete depleted I was able to get a code 6-08 when I pushed the light and AC buttons at the same time. It did flash a hyphen “-” in the middle of the screen after being fully depleted and plugged into the car port. That no longer happens, there is also no amp draw from the barrel port when plugged in to both the car and solar panel.
Any suggestions or do I need to find a way to charge via AC to see if it will recalibrate?
@bluetti_marvinbeslergmailcom The error code means “low PV voltage is low”. The possible reason is that the voltage of the solar panel is low or there is no enough sunlight. BTW, could you please message me in private with your email or order number, then I can check who charge your case.
The voltage and amperage from the panel is more than enough to fully charge a deep cycle flooded lead acid 114ah 29DC in about 8 hours while still providing enough amps to power a fridge through out the day.
They are two different systems, the EB3A has its own panel as does does the lead acid system. I have swapped panels and confirmed both are working on the lead acid with a Renogy MPPT controller. Have confirmed a minimum of 15 volts from both panels.
Hi, I have a similar issue. The device sometimes not charging from solar panels.
In the morning it wasn’t charging and it indicated like “shows the radial that its charging and it stops” - it happens when the voltage is quite low, like around 12-13 and its not enough to launch the mppt.
In midday it began to charge and it was working fine, but later when it go charged to 100% - it got “stuck” on not charging again. I’ve measured the voltage from the panel ~ 17v.
Then i’ve tried to jump start it from other battery with 22v, same problem that mppt not starting.
I guess that there is some logic when mppt is being shut down when the batteries are at 100%, and it got stuck in that regime.
Hi @sunder, Is your main unit also the EB3A? We believe this is normal behavior.
In the early morning, when sunlight is insufficient and the solar panel conversion rate is low, solar charging may not occur. Charging typically works only around midday when sunlight is strong.
You can also try adjusting the angle of the solar panels to improve performance under low light conditions. If the sunlight is indeed too weak, please temporarily disconnect the solar panels until direct sunlight is available.
Also, when the battery reaches 100%, the EB3A stops charging. This is a normal safety feature to prevent overcharging, which could damage the battery.
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.
@BLUETTI_CARE
Okay I’ll be more accurate with details, cause some missunderstanding here.
So the eb3a is at 40-50% of its capacity, connected to a solar panel under direct sunligh (midday, almost no clouds).
Solar Panel gives 17v , but the mppt isn’t draining any amps. Screenshot by Lightshot (measured the voltage from Solar), giving no error code.
I have also 2 small 12v batteries, and 1 battery is bad - giving around 8v.
So I’ve made some tests with batteries.
12v and 8v battery in circuit - Screenshot by Lightshot
Also not launching the MPPT, but i’ve got an error code this time “6-08”
Lastly the 2 good 12v batteries in circuit, got 22.5v from them.
This circuit is starting the mppt to charge, and eb3a is charging.
So the problem - eb3a doesnt want to begin charging from Solar, when its under 22v, thus it should begin cause the other day it was working fine…for like 2 years and i’ve been able to drain 140-150Watt from this pannel.
Hi @sunder, Could you please share the SN number and current firmware version of your EB3A? We’d like to check if a new firmware update is available for your unit.
The 6-08 error code indicates that the PV voltage is too low. If the actual input voltage is insufficient, the unit won’t be able to charge. It’s also possible that there’s an issue with the solar panel, causing no input current.
Hi @sunder, Thank you for the update.
It looks like everything is going smoothly.
We hope the issue will be fully resolved soon.
Thank you for your patience and cooperation!
