I have a question for the Victron experts and Diy’ers.
My original system consist of a 24v Meanwell TS 3000 inverter, fed by 4 12v-200ah Freedom won’s 2s2p and 2x 120AH 8s Diy banks with JK bms’es that in turn is fed by one 100/50 SMART solar and one 100/50 Blue solar with 2500w of pv panels between the both of them.
There is a smartshunt between the neg battery busbar and the inverter feed busbar and a bmv702 that only monitors the Freedomwon’s(this bmv’s voltage reading is about 2v below actual voltage but the current and ah reading is spot on.(I did the comparison between the two and found only the voltage to differ)
I recently acquired a old multiplus 48/3000 (latest firmware available for it is 209, it has a 19xx CPU) so no assistants available for this old CPU.
Yesterday I ac coupled the Multi on the Meanwell’s output and connected my local grid(no eskom) to the ac out1 on the victron with the idea that I will limit the ac input on the multi to 11A so the Meanwell will output max 2600w, and there after the multi can assist with the load upto ist overload capacity.
I also converted my 2x 8s banks to one 16s bank with a 100a JK bms and connected it to the multi, and set its charge current to 10A with VE config.
Now when the charger kicks in it makes a brief noise and charges for a couple of minutes then the inverter re-sets itself and I lose all power to my house, swithces back on make a brief noise, charges and after a short while it switches off again and repeat the process, The meanwell is still supplying to the ac input, but there is no through put to the ac out1. I cannot see any alarms in vrm portal. My house was drawing about 250W when this happened
When I set the charge amps to 0 it works perfectly minus the charging.
is there anything that i might have overlooked during the setup?
Admin please delete this thread.
as the multiplus was faulty.
I do want to state here that the seller CZauto’s integrity was beyond reproach regarding this sale, and refunded me immediately.
thank you CZauto
Sorry about the issue ragarding the Multiplus. I bought it faulty but found a loose connection inside, fixed it and tested it with a kettle as load which it boiled fine. After that I tried flashing the firmware to add it to my existing 2 Multiplus’s and realized it’s got the older chipset and was incompatible. I will send it for testing and repair when I get it back or maybe sell it as spares to someone tho might need it. I’ve got a working 3rd unit in the meantime and moved my whole setup out of the house, commissioned it yesterday after during a 32hour municipal grid blackout. Will start a new showcase thread on that soon
You don’t have to apologise, the way you handled my complaint is exemplary.
It seems to me, according to my limited testing ability at home, that one of the toroid transformers develop a short circuit when it heats up after a while of charging, but as soon as its cooled down it works perfectly again.
Just checked on Pudo tracking, the inverter is out for delivery today.
In the mean time I got hold of a multi rs solar inverter to keep the lights on.
Hi. It was delivered this morning, thanks. I’ve moved my new setup out of my home into an outside room where my generator used to be so I’ve got more space to properly test it there. Will definitely put it through it’s paces before trying to sell it as a functional inverter again. otherwise I’m considering selling it as is for someone to use as spares. My setup works great now with the 3 x 48/3000/35’s in parallel so I don’t think I’ll be expanding any further. Upgrading to one, larger inverter, maybe but I think I’d rather add more PV and storage capacity with that money. I always had an issue starting my big 200ltr 3hp compressor with only the 2 MP’s, especially if something else is running. The compressor’s got quite a big starting current surge. The 3 unit’s handles it perfectly though. Even with the geyser on it starts without any hickups. Anyway, sorry for the troubles and thanks again for your honesty
This is an old chipset Multiplus. I wanted to upgrade the mainboard but at almost R9k you can just as well buy a new inverter. They gou for around R12k now. I found a similar one to my other 2 for R4k which was quite a bargain. The 3 works perfectly in parallel. I’ve load tested it with averything possible and got it to around 8000W without tripping which is more than enough for my use. I like the fact that should one of the inverters fail, I’ve still got 2 left to carry me through while the faulty one is repaired/replaced. Not that I think that this will ever happen. The 2 inverter setup has been running faultlessly for more than 3 years, one I bought new in 2018 (standalone use until 2021) after which I bought a second, used unit for R8k, also in 2021. The build date on the used one is 2015, one of the first using the newer 2620 firmware. I had to force flash the firmware to get it to work though but they’ve been running hard since then. I guess they will not be working so hard now with an extra unit added. The fans barely comes on anymore