-
Multiplus II help settings
i bought a Multiplus II 5000 ive had it about a week.when i connect it to mt batts it just blinks low batts,,,well my batts were full at 49.00 volts, i have a custom setup,, i run from 49 to 42 ish bottom,, what i want to do is run this straight off solar,, i dont want the grid stuff at all,, no ac in,,, thanks for your help
-
2 Replies
-
33
XP
28
Honor
Hi Zach. Its very difficult to say, as it could be a list of possible things, especially if you built a custom battery which falls below the 48V nominal of the inverter. While the inverter’s datasheet states that it can handle a DC Input voltage range of 38-66V, your BMS (if you have one) and/or the VEConfig charger tab and BMS settings, have to properly work in conjunction with it. Am unfortunately still busy editing the Charger tab settings tutorial of my VEConfig video series, but there you would to correctly enter you custom battery values, if your BMS isnt handling this for you.
You can also download the victron toolkit at https://play.google.com/store/apps/details?id=nl.victronenergy.victronledapp&hl=en to help you troubleshoot the specific LED’s on your MPII
Secondly, it to make sure is that you are using DC rated fuses that are rated below your cable rating. Its very important to use DC fuses, as using AC rated fuses in a DC circuit is a big no for many reasons including arcing. One other reason, is that the spring inside an AC fuse, loses potential and fails due to heat, when in a DC current, which can result in low battery warnings.
If you are using NH fuses, then you should be using a gBat fuses https://www.dfelectric.es/products/nh-gbat-fuse-links-440v-550v/, designed for batteries, NOT a gG (general fuse) which is designed for AC.
Hope that helps, but beside that it unfortunately not possible to remotely give a definitive answer based on the numerous possible variables in your system. Best to get someone knowledgeable in your area to come on site and assist..
-
33
XP
28
Honor
In terms of ignoring AC input, there are various ways.
- You can use the “Ignore AC input” under the Virtual Switch tab of VEConfig. See this video on where to find that https://www.youtube.com/watch?v=sAIRQqOspuo. Note that once enabled, the “Set VS ON” and “Set VS OFF” conditions, when Udc is lower than will be greyed out. You actually have to go into VictronConnect app then into “AC input control” settings page to set these limits/conditions. Its dumb, but that’s how they currently have it designed.
- Is to use assistants with Programmable relays, again the above video talks about that, although not the exact setup you are looking for.
- Its also important to not have an AC input source selected in you Cerbo settings. Go to “Settings > System Setup > AC Input 1”. This should be set to “Not available”. (mine is set to “Grid” as im connected to grid for example)
- Once all the above is done, there are two settings you need to check in the cerbo, to confirm. First, go into the “MPII setting” page. There you will see “Active AC Input” which should not read anything. (Mine is connect to grid, so mine says “AC IN1” for example). Not sure what it says when not connected. Then from there, scroll down and go into the “Advanced” page. There you will see another message “AC input ignored” which should say “Yes” (mine says “No”, as I’m on grid). These are just two ways to confirm everything, you cant change settings here.
A video tutorial for this is also in the works, eventually 🙂
Log in to reply.