question

One feature that would benefit 'dumb' Lithium batteries (like the new Superpack from Victron) is to be able to set charging current to zero (or a low number) based on temperature (5 degrees C is generally specified to be a minimum charging temperature)

Why not just use Hydroponics gear

I use heat pads & fans to control the temp of my 60KWH battery box environment

main component is a heat/cool control unit adjustable for temp High/cool to Low/heat

we see temps from -7 to +35C has been working WELL for 3 Years

Multiplus controls the SOC

Guy,

It seems like relays and their control is a hot topic now. Why doesn't Victron create a "Relay Device" with 10 or 20 relay outputs. It could connect to a Venus Device (CCGX, etc.) via USB. You could then use software functionality in the Venus OS to drive the relays high or low based on data received from all Victron equipment that communicates with a Venus Device and use algorithms that are either built-in or customized via Node-Red .

Just a thought,

Pat

I am also looking for a similar solution - either as added functionality to existing equipment (ideally) or with additional interfacing hardware.

Currently my main want/request is to activate AC OUT 2 based on a few basic inputs from the BMV & MPPT.

Accordingly this would probably be best accomplished using a Venus device, although it may even be possible using a Multi assistant, if the few outstanding parameters were sent to it & available for selection...

I do know that integration of 'node-red' is in progress (which is exciting & promising), but I am a little disappointed because from what I have read on github about this, it will NOT be possible to run node-red on a CCGX device due to insufficient disk space... (and of course I have a CCGX in my system). Is this still the case?

In terms of the logic configuration, the following features would be very important for me;

- Easy to select OR & AND logic conditions (where multiple activation/deactivation parameters exist)

- Time condition that trigger thresholds must be met for before activation/deactivation

- MIN ON time condition

- MAX ON time condition (that could also be used alone for deactivation)

Is there any chance that the CCGX firmware/software could be updated to achieve this direct control over AC OUT 2? (without node-red)

I would think that you could possibly start with a rough duplicate of the automatic generator start/stop logic/layout and link it to triggering AC OUT 2 as the first step, then progress as required from there?

@mvader (Victron Energy Staff) if there is any chance that you could comment on the 'feasibility' of my request it would be greatly appreciated.

I do understand that the quantity of 'feature requests' coming through is probably getting difficult to digest/follow up & prioritise - but "if you don't ask, you don't get", so I am asking... :-)

Regards, Mark

Not sure which bits of the system you're thinking of. Below are some points relating to the relays themselves if they're to be part of the product.

Size of loads. Are you intending that the relays would drive end devices directly or relays would drive external contactors? Can designer choose different relay types?

Manual override. Can operator force relay open/close if system (incl. software elements that is external to your product) is misbehaving and needs intervention.

Positive confirmation of relay position. For critical circuits/conditions the designer may want to get confirmation that the relay has in fact operated as commanded.

Inductive devices (incl. coils for contactors) can be driven you might want to have an option of an integral shunting diode to increase contact life. Should be an option because there are some circuits that require the diode to be NOT installed (eg gigavac dc contactors).

Hello,

Has there been any progress on this topic? I have a battery enclosure with a loud fan I'd only like to come on when the battery temp sense is over a certain level.

Thankyou

Late to the conversation on this one being it is 2023, but I'll give it a whirl... It would be nice if you could set relay rules with two temperature sensors... ex: rule 1: solar compartment sensor temperature is greater than outside temperature sensor that would turn on a vent fan.

Can the relays also be controlled by Float switches in the diesel tank switching ON and OFF