Certainly done full recharges, never taken the Roamer lower than 50%.
Cerbo help needed
- Thread starter The Flying Scotsman
- Start date
yep - well do that run it down to bellow 0% and it will shut down.
then give it the full 230ah recharge and your capacity should reset back to the 230Ah.
you only need to do this occasionally is the SOC readings drift.
as you battery is new. . . its worth doing so the calibration is set for your actual install.
..
i might do this maybe once a year if the readings look a bit off.
..
FYI - lithiums should not be run flat . . and LEFT flat. - they will be damaged.
BUT
a full discharge with immediate recharge cycle is perfectly fine, - and sometimes required to reset/recalibrate the internal BMS.
Best way to run flat? Gently leaving the inverter on, or getting the wife to boil full kettles of water on the induction hob?!
If you have an inverter, run a fan heater with the door open. Will be flat in no time.
Run it down with kettle or fan heater to 10%
Then ease off to a smaller load.... Or you will get a false 0% due to the high load volt drop.
Id go for a big load down to 10%, then a smaller load. Say 10/20A ... 100-200w for the last 10%.
That should see it properly empty.
...
Then plug in your EHU charger and recharge.
A 10A charger will take 23hrs to charge.
A 50A charger will 5hrs to charge.
(Quick maths for a rough time guess)
Hi Lee,
That’s me trying to sort this out now after it’s finally stopped raining.
I’ve removed the shunt and I’m trying to find the options of shunt/roamer etc in the Cerbo settings but can’t find it.
My Cerbo screen now looks like this.
Any help is appreciated guys
Cheers.
Also found that my EHU is not working. Which means no microwave or my mains charger working.
This will need further investigation
see here:
if you have a ROAMER SMART, where the battery has CAN data port - that is connected to the CERBO GX
support.roamer.com
if you have a ROAMER SMART, where the battery has CAN data port - that is connected to the CERBO GX
Knowledge base
support.roamer.com
SMART4 and SMART5 connection with Victron GX devices
Edited 4 months agoWe've made a quick and easy guide to show you how to get your new SMART4 / SMART5 battery connected ot a victron GX device. This includes the Cerbo-GX, Cerbo-GX MK2, Cerbo-S GX, Ekrano GX MultiPlus-II GX and EasySolar-II GX.
https://support.roamer.com/en/articles/1882562#getting_started
Getting Started
For this guide, you'll simply need:- Roamer SMART4 / SMART5 battery
- Victron GX Device
- Roamer to Victron GX CANbus cable
- CAN Terminator (these come with your Victron GX device)
- Smartphone with Roamer SMART App
https://support.roamer.com/en/articles/1882562#battery_connectors
Battery Connectors:
From left to right, the connectors on the battery are Link, CANbus and another "Link".
This means that whichever way you are facing the battery, the outer connectors are the Link connections and the inner is the CANbus.
To connect to the GX device, we will use the inner, CANbus connection.
The connectors on the battery are all M12 female threaded. This ensures a secure connection with the cables.
https://support.roamer.com/en/articles/1882562#connecting_cables
Connecting Cables:
https://support.roamer.com/en/articles/1882562#battery_endBattery End
When connecting any cables to the battery, ensure the battery is first powered off.Next, take your Roamer to Victron GX CANbus cable, and line up the slot inside the M12 connector with the slot on the connector in the battery, the cable should point towards the middle of the battery.
Push the cable gently down into the connector, and then turn the metal collar clockwise to screw the connector in place - keep pushing gently whislt you do this, as the process of screwing the collar into the connector will pull the connection in, making for a snug fit.
https://support.roamer.com/en/articles/1882562#gx_device_end
GX Device End
Take the other end of your Roamer to Victron GX CANbus cable, and plug the "Ethernet" plug into the BMS-CAN port of your GX Device. In the adjacent port, plug ina. CAN terminator.The CAN terminators come with your GX device and look like this:
Now turn the Roamer SMART4 / SMART5 battery on via the power switch on the top of the case.
That's it, you're all set up and monitoring your Roamer SMART4 / SMART5 battery via your Victron GX Device!
If you have a GX device without a BMS-CAN port, such as a Cerbo-S GX, you can plug it into a VE.CAN port instead, but you'll need to then change the port function - see the troubleshooting section in this guide.
https://support.roamer.com/en/articles/1882562#troubleshooting
Troubleshooting
https://support.roamer.com/en/artic...ay_the_roamer_battery_data_on_the_main_screenThe GX Device doesnt display the Roamer battery data on the main screen
The GX device must have its battery monitor set to "Automatic" for the system to work in a "plug and play" fashion. If this is not set, you can manually set this on the GX Device, with the touchscreen or Remote Console.Go to Settings > System setup > Battery monitor and select "Automatic" or the Roamer battery in the list.
https://support.roamer.com/en/articles/1882562#my_gx_device_doesnt_have_a_bms_can_port
My GX Device doesn't have a BMS-CAN port
The Cerbo-GX MK2, Cerbo-S GX, Ekrano GX do not have a dedicated BMS-CAN port.Instead you will need to use the touchscreen or Remote Console to set one of the VE.Can ports to use BMS-CAN.
Go to Settings > Services > select the VE.Can port you wish to use > CAN-bus profile.
Select "CAN-bus BMS LV (500 kbit/s)".
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Typically I can’t find those wee blue things. Found absolutely everything else I used when installing the Cerbo but no Cerbo box.
I’ve tried setting the Cerbo as in the videos from victron but it’s still the same.
I think I will need to order those wee blue things and try again
Why did you remove the shunt?
Because Lee said too. Because I got both the shunt and direct cable from my Roamer to the Cerbo.
Lee reckoned that having both was causing the problem
I’m going to have to order those wee blue things I think
I'll have a look in my cerbo box when I get home to see if there's a spare in there, you should only need one... I think!
I don't use a shunt, I just keep a closer eye on my LB voltage. When it gets to 12.8v it's time to use the EHU lead or drive the van!
But the shunt is far more accurate than the battery BMS. Better off using the shunt and not the direct cable.
Ok I will remove the Roamer direct cable from the battery to Cerbo and reinstall the shunt.
That should solve needing a can terminator wee blue thingy also.
I will give it a go tomorrow
Thanks
That’s what I did.
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