I am having an issue with a two year old Multiplus 12/3000/120. With mains on, and switch set to 'Charge Only' the unit will charge the batteries at a bulk rate. When it is getting close to the point of where it should roll over to Apsorption, the unit shuts down. More detail below:
- After a day of troubleshooting the charging system, the inverter shut down. There were no lights, no fan, and the batteries were not charging. The CCGX was giving a 'Grid Lost' alarm. When I checked the inverter, 120vac was present at the input, and 12.5VDC at the battery terminals. Cycling the switch caused no change.
- On returning to the vessel the next day, the 'Mains On' light on the inverter was lit, but the unit still would not charge batteries. I removed all AC and DC power from the inverter and allowed it to sit, hoping it would reset.
- I returned four hours later and reapplied power; still no charge, no lights. I connected with VictronConnect and flashed the software to the latest version (v497), and reloaded the parameters. On applying AC power, the inverter lit up and started to charge the batteries (bulk charge) at about a 50A rate. Voltage indicated while charging was 13.9V at the time.
- The owner contacted me next morning, sending photos and video of the Multiplus and CCGX. The Multiplus is again in an off state, not charging the batteries. "Mains" LED is on, but no fan and no charge voltage. CCGX is again indicating "Grid Lost". I noticed on the CCGX alarm panel that the same error alarmed earlier that same morning.
Is the issue with the Multiplus, or could there be something else going on. I did also notice from the photos, that the Battery voltage with the charger offline is sitting at about 12.6VDC, which according to US battery is close to full charge.
FYI, the original CCGX failed on this vessel early this year with a "Hardware problem detected #42 - storage is corrupt on this device" error. The unit was replaced per Victron's recommendation. The new CCGX has been in place for about a month now. It looks to me like it is functioning OK, other than possibly needing a software update.