Hi,
I have a Multiplus 2 with Loads on AC-1 Out and non-essential loads on AC-2 Out. I want to install a Manual Transfer Switch so that I can switch power from the Multi to Grid for maintenance. How would that be done?
Thanks for any help.
Cheers Paul
You need a three-position I-0-II manual transfer switch.
You would need a switch for both ac outs, the 4 pole one above would work, or 2 x 2 pole ones.
Thanks for all the responses. I was wondering how to do this as I wondering how to switch off AC2 out - I couldn’t see how a 3 pole switch could do it. I’ll get the Hager. Cheers
@Bassman Where abouts are you location wise? If in the UK pay attention to the amperage of the transfer switch as a lot of our single phases start at 60amps and go well beyond.
Hi Daza - You’re right. At present I’m not using AC Out 2 and am using a Hager SF263 (63A) 2way which works fine. Now that I’m putting non essential loads on AC 2 this is why I’m researching. BTW, I’m in Australia. Another suggestion was to use 2x 2 way switches - certainly cheaper! as I’ve already got one. I’ll run that by my electrician.
Thanks All, Paul
Hi Paul, just for my understanding, why are you connecting non-essential load not directly to grid? AC-2 Out is disconnected if grid fails. I have everything connected to AC-1 Out (incl PV and EV). With the SFT440 I can bypass the Victron for maintenance. I just need to make sure that car is not charging if grid fails for instance.
Yes 2 2way switch’s would be better, I get your thinking, if I have interpreted this correctly you want to go around the Victron system ie Victron goes down switch to grid house continues to run on grid while Victron goes to be fixed or replaced if so this is what I have done but I’m only using AC 1out, I will connect big loads grid side and just let the Victron cover it with a clamp, PS don’t forget isolation to the input of the Victron system which would mean wires could stay in situ and be locked off
Thanks for all replies, suggestions etc. I have had a rethink. My Multi 2 is the 5k/230vac version. According to the specs ACOUT 2 has a maximum of 32amps. So due diligence - I did a rough calculation of everything that would on ACOUT2 and to my surprise (if everything was on) would be around 45amps - however unlikely that scenario would be, but who knows! So I will keep that as it is - parallel. I must say that on essential loads I run a 7kw and a 2.5kw a/c, TV, Fridge and lights no problem at all and of course they can be run hard - it gets hot here (and cold). At maximum I guess I would only get a couple of hours on battery only but that can be easily managed.
Cheers Paul
Hi mate remember that the output is dependent on the multi’s temperature it will down rate itself if it gets too hot, so over engineering might pay off better, not trying to sell you something but do it once and done it gets more expensive swapping kit cable later down the line
You can also consider a contactor to disconnect the non-essential loads from AC1 out, using AC2 out to energize the contactor. Then you can program AC2 to disconnect when the battery reaches say 60%, which will turn the connector off.
