Hello,
I have a 12 volt Victron solar charger, shunt, inverter and Cerbo system with 2 LiTime lithium batteries that I installed last year. We winter in RV parks then live off grid in the warmer months.
The first winter the lights would flicker when the water pump or microwave would start, but it seemed kind of normal to me based on other RV’s I have been in.
Now last week we hooked up to shore power at a park and the lights are flickering a lot more and about every 3-5 minutes one big flicker and they also pulse sometimes as well. The power draw doesn’t seem to matter but the water pump definitely causes a lot of flickering as well as starting the microwave. We then boondocked for another week and I noticed a coil whine sound from the MPII. I opened it up and everything was clean and looked normal, no dust on the fan. Everything still works rock solid off inverted power.
Now we are at another RV park and we get the same pulsing and flickering. We have a 50amp system with a surge protector that is installed before the MPII and there are no errors with the park power. I have checked my connections and ground multiple times and it is just one ground ran from the Lynx.
I do feel like I get less pulsing if I flip the MPII to charge only.
My lithium batteries are the same age as everything else and I have tried using just one battery at a time to see if somehow one is bad even though that seems highly unlikely. I have also programmed everything based off of Explorist Life’s suggestions and this build is straight from one of their plans.
Does anyone have any ideas or suggestions I can try to figure out what the culprit may be? I feel like it has to be something with the MPII and maybe a part is failing but I am no electrical expert. I just followed guides to install a couple of systems and now this second one I have done is causing me a bit of grief!