Issue:
- Multiplus 12|3000|120 Inverter does not seem to be inverting power or charging batteries.
- System is used on a Sailing Catamaran in conjunction with a CCGX, a SmartBMV712, & a MPPT 150/100
What was going on when I noticed the problem:
- Had 2 small floor heaters attached to 120 circuits. (On 2 separate breakers as they trip the shore power breaker when on same circuit...ie, they drew some wattage.)
- I disconnected the shore power…to take boat out
- Things and heaters were working with shore power disconnected
- I started the engines
- I went down to turn on engine blower and look at breaker panel and noticed I had no inverter (120V) circuits…. All the breaker lights were out.
System is now on shore power and I see the following:
- Only see solar charging batteries (@ night batteries are being drained)
- 120v is going thru inverter and only powering all the 120v outlets on the boat.
- On CCGX
- I don’t see any power going to batteries from inverter, all is coming from solar.
- charge status in "float"
- On the Inverter I see:
- When turning it on:
- solid "inverter on" light
- solid "low battery" light
- After a few seconds the inverter lights change to:
- solid "Mains on" light
- solid "bulk" light
- When turning it on:
- When I turn off the shore power breaker all 3 of my inverter circuits are dead.
Troubleshooting:
- Tried to reboot inverter:
- Turned off then back on inverter.
- Briefly get red light for low battery
- Low battery light goes off and I get ‘Mains on” and ”bulk” light
- Tried to see if any battery power was going to inverter:
- Turned off inverter
- I measure 15.85 VDC across the large battery cables on inverter, so the battery is not low.
- Tried to see if battery monitor from inverter to battery was issue.
- I removed wire and lights on inverter went from solid "bulk" to solid "absorption."
- Tried the on/off switch in charge only, got same light config
- Reconnected the battery sense wire inverter light stayed on solid absorption, I cycled inverter power, light went back to solid bulk
Questions:
- Why do I get “low battery” light when I have 15.85 VDC battery connected to the inverter?
- I measured this w/ inverter turned off so as not to measure a voltage the inverter is generating to charge the batteries.
- Why is the inverter saying “bulk” when the solar MPPT is saying "Float" and batteries are at 100%?
- ...and better yet, why is it not inverting OR charging my batteries?
