I have a Multiplus II Inverter Charger
My app shows 100% charge and the Multiplus in ‘Idle’ mode.
The charger itself shows both Mains On and Bulk Charging
I do not have solar. This is battery backup on a city grid. If the city grid is supplying power to the house and bypassing the inverter / charge. Would it show bulk constantly?
Hi. The ‘External Control’ state suggests you have managed batteries controlling charge. The Multi’s own charge settings are being ignored, but they still exist, and should have been set to a ‘safety’ level in the event of a possible loss of comms in the system. Lets say Multi’s Absorb V is set to 53V, above what the bms is targetting. It won’t reach that normally, and it will continue to indicate Bulk as it’s state.
So it’s completely normal. Indeed if you were to see the Absorption led on for more than a flicker, it could indicate a system fault and is calling for attention.
If you were to have solar too, it works the same. Bulk is where it spends it’s day, as it never actually reaches it’s own safety setpoints.
Thanks John
When the batteries are charging, I do see the Absorption and Float LED’s lit at various times. It is not always Bulk. After power went out shortly this morning, I heard the batteries charging and I saw the ‘Absorption’ setting lit. It is back on bulk now.
Is it normal when charging that the LED’s would change? Or should there be a setting that kills any LED’s other than bulk at any time?
Yeh, I said ‘flicker’, but it depends on settings, overshoots, maybe even time delays and suchlike. The point is that the leds are representing what the Multi sees, not what the bms is actually doing.
There’s no settings I’m aware of that provides any control of what the leds show, it’s just a simple internal thing in the Multi that’s indicating whether V has actually reached it’s own setpoints.
