Victron BlueSolar programming

In my camper I currently have a Victron 12v Multiplus 3k inverter that I control with a VE.Bus Bluetooth dongle and this is connected to (2) 100Ah SOK LFP batteries. I recently installed a 315W solar panel on the roof. I ordered a SmartSolar MPPT 75-15 from Amazon to run the panels through, but instead they sent me a BlueSolar 75-15 (no bluetooth). I got ahold of them to fix this but it is going to be a week before they get the right one sent out...assuming they get it right this time. I have to get this incorrect one sent back by the end of June.
AFAIK, I have no way to interface with the MPPT to set it to charge LFP. I'm guessing this is not plug and play. What is this going to be programmed to charge right out of the box? Lead acid I am assuming? Is there a way to interface with this I am missing? It came with a small clip that seems to be bridging the center two pins of the VE.Direct port together. Can these pins and "bridge clip" be used in any way to set ot to a default LFP algorythim? Is there a way to communicate with it through the Multiplus? Any help is much appreciated!

Lead acid.

Default is 14.4V absorption, 13.8V float with temperature compensation enabled.

Jumper is for load output algorithm.


If you trust your BMS, and it's not too cold in the morning, you shouldn't have any major issues. If you notice voltage spikes, that's the BMS triggering protection, and it's charging to too high of a voltage.

The cheapest option to get access to the full configuration options is ve.direct to USB cable to a Mac or PC running VictronConnect.

Ok, thank you for that. The new one should be here Tuesday which is likely not any sooner than a ve.direct cable would make it here...so I'll just have to continue being patient.

Thanks again!

Do you know the reseller on Amazon?

There’s two that I trust, Inverters R Us and Pike. I’ve had to be specific when I’ve ordered off Amazon to avoid possible issues.

thepartyhound said:

a 315W solar panel on the roof. I ordered a SmartSolar MPPT 75-15 from Amazo

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A 315 panel under good solar conditions , with a MPPT controler, has the possibility to generate well over 20 amps in a 12v system , so a 15 amp controller may limit possible solar yield. In practice, with a horizontal panel on a camper, the panel will be producing less than 315 watts but still enough to cause the 15 amp controller to be working at maximum output. Perhaps consider a higher current rated controller in the Victron range.
From looking at your previous posts I see this has been discussed previously. From past experience I recomend installing equipment that operates well within its rating, leaving 'something on the table'. Very often in marine and RV installations cooling is compromised due to the confined space. This may lead to the electronics running hotter than ideal, reducing reliability.

mikefitz said:

A 315 panel under good solar conditions , with a MPPT controler, has the possibility to generate well over 20 amps in a 12v system , so a 15 amp controller may limit possible solar yield. In practice, with a horizontal panel on a camper, the panel will be producing less than 315 watts but still enough to cause the 15 amp controller to be working at maximum output. Perhaps consider a higher current rated controller in the Victron range.
From looking at your previous posts I see this has been discussed previously. From past experience I recomend installing equipment that operates well within its rating, leaving 'something on the table'. Very often in marine and RV installations cooling is compromised due to the confined space. This may lead to the electronics running hotter than ideal, reducing reliability.

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Yeah, I'm sure you're right. At the middle of the day, in the middle of summer, I might be letting a few amps slip through my fingers. Honestly though, these are used panels and are only putting out about 90% of their rated power to begin with; add to that the fact they are flat mounted and it starts looking like less and less power lost. Plus, this setup will be used much more in the winter than in the summer.. and winter around here the sun stays pretty low. All in all, I am sure that there will be SOME instances that I will be limited by my charge controller, but I think those instances will be few and far between. I will also eventually install a DC-DC charger so I would expect that and the generator I bring with me to do the heavy lifting when my batteries get low. Honestly, adding the solar panel was as much a chance to get some hands on experience and practical knowledge as it was to actually charge a battery. The final straw was the price increase from the 75|15 to the 100|20 was pretty significant for the small handful of times I'd likely actually make use of the extra output. If I find I am limited by the SCC frequently, I'm sure I could upgrade then.

740GLE said:

Do you know the reseller on Amazon?

There’s two that I trust, Inverters R Us and Pike. I’ve had to be specific when I’ve ordered off Amazon to avoid possible issues.

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After Amazon screwed up the second SCC they sent (another BlueSolar unit) I took your advice and ordered directly from InvertersRus. They got it right, finally! I did get a total of $60 from amazon for all of their screw ups on this purchase though.