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hi I have a victron multiplus and a 150/85 smart solar, priority charging, its on canal boat in the uk, its cnnected to a shoreline. but i would like to set it so if its sunny it will use the solar as much as i can to save on my electricity bill. could anyone help :-)
If you are familiar with using a virtual switch in VEConfig, you can use a function called “AC Ignore” to have your Multiplus ignore the available AC from shore line or generator unless certain conditions exist.
For example, you can ignore available AC for charging, thereby forcing the system to run on solar only, unless your batteries reach a certain voltage or state of charge. In this way, your system would prioritize solar, but use shore power when PV power was insufficient to keep your batteries charged to your specified level. Once your “off” parameter was met, it would return to AC Ignore until the “on” parameter next exists.
You can read up on it here:
https://community.victronenergy.com/storage/attachments/3299-virtual-switch-ignore-ac-lesson.pdf
Hi @dazo1984
If you set the charge target(s) in the Multi just a little lower than the mppt, then the mppt will take priority once the target is reached. You may need to make allowance for Temp Compensation, especially if the mppt doesn't have access to external Temp readings.
But there may be a lot more options you could consider, like not charging at all for a set period before sun is expected, so as to give the solar something to charge. And if the Multi charger is always-on, then maybe it just needs to be set for a low Storage target.
