Updating SoC from ZCell over Modbus TCP (I know it's deprecated but... :) )


I am trying to update the SoC via Modbus TCP. It's enabled on the CCGX (running 2.22). The CCGX has a Quadro connected and it's reporting the following error:

ERROR 2018-12-18T00:59:15.773 "Error processing function code 16, unit id 246, src, start address 30, quantity 1, byte count 2 :" "Requested device (service) does not exists"

I followed the instructions from:


I know it's deprecated but this is my only option for now. I have checked the registers and it appears that I have the right unit/registers ?



dewitpj asked
dewitpj commented ·

4 Answers

Switching from Sead Lead Acid batteries to LifePO4

In a little sailing boat I'm thinking to switch from SLA service batteries 330Ah (n. 3 x 110Ah) to LifePo4 batteries.

Assume that 330 Ah was the correct services sizing, I have n. 3 question :

1) was my Atlas Combi 12/1500 (50 Ah nominal charge) able to charge the LifePo4 or I must change something in it (the charge curve) ?

2) what was the right LifePo4 size to remain a little bigger (more confortable) ?

3) the engine alternator was sized to 60Ah because I don't want to overcharge my SLA batteries (more time was more endurance ...). With LifePo4 that accept bigger charge, need I to change alternator with an High Output Alternator (perhaps 120 Ah) ?

Thanks to all,


adriano asked
wkirby answered ·

3 Answers

BMV-702 & Blue/Smart Solar Charge Controller

Hey friends!
Can I connect a BMV 702 to a Blue or Smart Solar Charge Controller to use the temp sensor on the temp compensation with this kind of charge controller? /Without a GX device/

dcpablo asked
dcpablo commented ·

1 Answer

How do I prioritize Solar in a Hub2 system?


I use a Quattro with Sunnyboy inverter and the system decides on a bright sunny day to run off batteries rather than solar? Come night time the batteries are depleted. I would prefer to maximize solar use first, then use batteries, and lastly grid. I also may not feed back to the grid hence I cannot use ESS on my system in South Africa. Is it possible to write a tool to assist with this? I am computer literate but would like some guidance as to what is possible.

Thanks in advance, Jury.

jurycoetzee asked
Johannes Boonstra (Victron Energy Staff) answered ·

3 Answers

VictronConnect won't update SmartSolar MPPT 150/70 on Nokia5 or Galaxy S8

Hello Victron ;-)

A customer is reporting that their SmartSolar 150/70 MPPT requires them to update the firmware before they can use the app.

However when they click the update button, it only goes to 1% and no further.

They have tried with two different phones the Samsung Galaxy S8 and the Nokia 5. They are remote and no Apple devices (iPhone or iPads) are available (which is usually a safe bet for a smooth update).

They are stuck and unable to proceed.

My resolution is to send them a USB to VE.direct cable on loan so they can attempt the update over the wire with a windows laptop.

But is it not possible to have another way?

e.g. a hidden feature to bypass the update requirement so they can access the feature to equalise their batteries? I understand this will break other features, and that the VictronConnect app software expects the latest firmware to be running, but in some occasions this would be preferable.

The troubleshooting firmware updates section of the VictronConnect manual doesn't have a section on SmartSolar yet.

Guy Stewart (Victron Community Manager) asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Solar controller not putting out full power
  • Hello I have attached a 100/50 controller to a 600ah 12v lifepo4 battery bank. And am charging that with 1000w at 40 v.

I put a clamp meter on the the cables and I know the batteries are a bit low yet it is still only putting in 15 amps. I have also a 24v set of 300ah these are doing a bit better but I still don't believe that I'm getting everything out of my panels and in to the batteries.

Any ideas please

roger asked
roger answered ·

4 Answers

EasyPlus 12/1600 Odd Behaviour

Just fitted a 12/1600 EasyPlus to my motorhome and I'm seeing some odd behaviour. Just wanted to get your opinion on it. The charger appears to take my battery pack to 14.6v on absorption, even though it's set to the default settings which should be 14.4. This is above what is recommended for my Victron Deep Cycle Gel batteries, so I'm worried I'm overcharging them.

I've connected the starter battery to the unit using the aux battery terminal inside the unit. This is supposed to be a 4a charger connection. When charging on main electricity the Venus GX is reporting that 120w is being sent to the DC system. If I disconnect the aux battery connection this current stops. This makes me think that it's pushing 10A to my aux battery not 4a. The aux battery voltage also seems to increase when the device is disconnected from mains electricity and I'm just getting power from my solar panels.

I've got a SmartSolar 100/50, Venux GX and BMV712 and 2 x 130ah Victron Gel Batteries.

jimothyc asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Manual generator not staying connected to Quattro

I have a customer with a 3 month old Quattro 8000 and manual genset start. It was the first one I’ve ever installed

I have not been to site yet as it’s quite remote and quite a drive but thought id get some ideas before I go as there is no phone range on site

Customer has said that when genset is plugged in and turned on, the Quattro seems to not take the input and switches between charge and inverting every few minutes.

I have set the generator input current to 20A because of his existing cabling in the house which he wanted to leave but his genset is a Kabota 6kVa

Otherwise it operates normally without genset

I’m sure it’s something I don’t have set right in config but could I please get some ideas on what to change and look for.


steve asked
steve edited ·

1 Answer

CCGX Wrong SOC Calculation

The CCGT do not range the percentage correctly to the voltage. It stays between 84 % to 100%. Causes low voltage shut down despite voltage 51 or higher. Quatro 5000 where ccgt sensor connected Quatro. Voltage shown correctly in CCGT. It is only the percentage not related to voltage. What can cause this disalignment?

windnsolar asked
markus edited ·

1 Answer

Charge current control with a substantial DC system?


That's probably more detail than anyone needs, but I'd rather get it all out there initially.

Short story: I'm trying to get the BMV's measured battery current to drive the Quattro's charger current regulation. I have a large DC system, which can draw more than the batteries' rated charging current, so the Quattro's own DC output metering isn't appropriate.

Long story: I'm not running on battery for very long, just minutes between killing shore power and switching to engine/generator power, so I don't need a huge battery bank. The 4 batteries here barely fit anyway. The Power-Sonic datasheet says up to C/5 (20A per battery, 80A for the bank) is acceptable. Still, 80A is way lower than the DC system, which can draw over 100A when everything's active.

I have a CCGX, which talks to the BMV and SmartSolar over ve.direct and the Quattro over ve.bus. It seems to understand the SOC from the BMV, and it does the math to figure out how much "DC system" load there is, but I can't figure out how to feed this info back to the Quattro to actually control its DC charging output.

I'm totally fine with short transients, like if the DC load goes away and 200A suddenly gets shoved into the batteries. They should be able handle that for a few seconds, just not hours at a time.

Is this what DVCC is meant for? Is there an assistant I should be using?

Thanks in advance for any hints!

nbezanson asked
Johannes Boonstra (Victron Energy Staff) answered ·

1 Answer

batteries discharging value

for 24 v system 23.8 v limit of switch on grid power it is ok?

florian asked
Johannes Boonstra (Victron Energy Staff) answered ·

1 Answer

How can I check the capacity status of my Peak Power Pack full /half or empty?

I have the 40Ah version and the Bluetooth Dongle. But there are no informations About the state of charge.

sky asked
Johannes Boonstra (Victron Energy Staff) answered ·

1 Answer

MPPT 75/10 Efficiency Curve

Does anyone have an efficiency curve for the MPPT in the SmartSolar Charge controllers? I need to know if there are any efficiency difference from 100W-400W range

tamirlance asked
Johannes Boonstra (Victron Energy Staff) answered ·

1 Answer

Phoenix Remote Panel sequential light display and inverter/charger not powering up.


On a narrowboat with a well installed system by a top boat builder in 2006.

If I power off the inverter/charger, when I switch it back on, lights flash very quickly (on then off) but the remote panel's lights (2 x vertical rows) light up sequentially right to left and this process continues. I resolved this the first time with a good old fashioned heavy knock to the main unit and it worked but cpild of course have been coincidental. Then this happened again a couple of days ago (I'd isolated the power to get inside the unit to check for the temp. lead). Whether coincidence or not I don't know, but a few swift turns of the heavy isolation lever for the inverter/charger supply resolved this.

Does this sequential light display on the remote indicate a an insufficient power supply issue?

markinaboat asked
markinaboat answered ·

2 Answers

Top Contributors - Community Supporters

kevgermany avatar image kevgermany 244 Answers & Comments
Alexandra avatar image Alexandra 164 Answers & Comments
seb71 avatar image seb71 155 Answers & Comments
marekp avatar image marekp 119 Answers & Comments
Matthias Lange - DE avatar image Matthias Lange - DE 106 Answers & Comments
Stefanie avatar image Stefanie 96 Answers & Comments
klim8skeptic avatar image klim8skeptic 94 Answers & Comments