I want to renew a topic that was discussed and then seemed to die.
I have just replaced a smartshunt with the lynx shunt as my battery bank is growing. Prior my voltages were withing .02 of each other between the Quattros, Shunt, and solar controllers. Pretty good. After installing the Lynx shunt, I now have almost .75v differences. This can cause issues if the Lynx was set as the controlling battery monitor. As I have the Epoch batteries, that are hyper sensitive to voltages over 14v, I cannot have it as the battery monitor. If I switch to the batteries, then I run into other issues. So now I’m stuck with an expensive part that seems to have been plagued with this issue for a while and want to bring this back to top of discussion to either add an offset, or improve the voltage sensitivity. Appreciate the help!
You have purchased what is called the most expensive fuse holder. Enjoy, There is not much you can do but go back to a shunt and use the battery or the Quatro for an estimate of SOC.
Is the +0.75V reported only by the shunt? If so take it in account when you do the monitoring.
Example you want 100% at 14V, set the shunt 100% threshold at 14.75V.
If you dig in the links you mentioned you find more details.
BTW Victron will never fix anything about this topic I lost hope.
I have not seen this issue in my system that has Victron 150/35, Lynx Shunt, Lynx Distributor, Quattro and Cerbo GX.
Half the voltage issues I see on DIYSolarForum.com are due to poor connections. Take the cable lugs off, clean both surfaces, use a light coat of NO-OX-ID and reassemble using a torque wrench to spec.
I would say this is the issue, except the Lynx shows a different voltage at a midpoint between batteries and the quattro. The inverters, solar chargers, and the batteries show differences within a few hundredths of a volt. Not a connection issue, its a measurement issue at the device. As discussed in several other posts, this is not an uncommon issue. Glad you don’t have it though!
I brought it back to the top to make sure it didn’t get lost. Luckily I have an alternative with the BMS, however, it doesn’t excuse the “expensive fuse holder”. Otherwise I would have to follow the same direction.
Looking to at least bring it back on the radar for Victron if possible.
If so this is the wrong way. Since this is not actually an ask victron forum and certainly not the correct way to get official support.
The correct way to handle product problems is to return it for an rma if it is not behaving as it should.
That way if there is a product problem it is correctly documented and dealt with.
I would like to know if this is a continued issue, or if I do have an RMA issue. Or to bring it back to Victron’s awareness as there are members of that team here to see if there are plans to resolve this issue.
So FINALLY a solution! The latest version of Victron Connect has an option to calibrate the shunt’s voltage. I am testing it out, but so far, it has made a difference. I hope this helps others!
