This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
Beside solar panells I added small hydro turbine. Batteries are quickly fully charged, so turbine turns without a load...
I know there are diversion load controllers, etc. I was wondering if Multiplus 5000 can be programmed to switch on an AC heater if batteries reach certain voltage (in my case 54V) and switch it off if batteries are discharged to certain voltage level (50V).
Thanks,
Andrej
@Markus has a hydro system and he has done something with a heater too.
I'm sure Markus would be able to offer more valuable advice!
Hi, yes indeed. But I have my dump loads connected before the MPPT controllers, not to damage them by my turbines high OC voltage.
@valos has managed exactly what @Andrej wants :o) as I have read it in this post:
https://community.victronenergy.com/questions/2089/mppt-dump-load.html
Best Regards,
Markus
You can use one of the assistants to switch AC-2 on/off at certain voltage or SOC levels.
Personally I'd use the 'generator start/stop' assistant (in reverse) so you can also switch off this dump load when other (high) loads are present, so the dump-load doesn't reduce your maximum output.
Another option is to use one of the programmable relays to switch on/off one or more loads (when AC-2 is used otherwise)
I am thinking of going the following route for implementing dump load control in a system with a Pylontech battery and MultiPlus. Any opinions would be welcome.
Use a Solic200 diversion load controller. This can deliver proportional power to the heating element in the water tank based on the current coming from the PV panels. The image shows the sensor before the MPPT but putting it between the MPPT and battery would be better. The diversion to heating element would only operate using the signal (or reverse signal) generator start/stop from the CCGX. Set this to activate based on the battery fully charged voltage. It would energise the contactor on the output of the MultiPlus and allow the Solic200 to start diverting excess power. You would not be cycling the batteries as the power diversion would be based on real time PV power production and only the amount available would be diverted. When voltage lowers then switch the contactor off.
I don't see any reason that this would not work so if there is anything obvious that I have overlooked then I'd appreciate any comments?
if you'd put the current sensor at the battery wiring, would it try to keep battery current at zero? that would be ideal.. it then also compensates for loads on the AC side.
I just found an obvious problem. The Load sensor for that Solic device measures AC and not DC so does not seem to be a viable solution. Back to the drawing board for this project.
