MrM1
I'm Here, But I'm Not All There
@Hedges Yes I agree in this new dawning age of LFP and DIY batteries, it does indeed seem that a pre-charge resistor somewhere in the set up is in order. And hats off to Sig Solar for trying to tackle this at the battery side level. And it would be nice if companies like Schneider would actually release a firmware that address this and initiates a slow start up, but I am not holding my breath.
But my question is this, specific to Schneider Inverters ~ the XW and SW. As @Koldsimer pointed out in post 1 of this thread ...
My assumption is the XW is "starved" for current or power and is pulsing because it is not getting enough to turn on? If I recall @Koldsimer did not get a low voltage fault at the XW because it never even got enough power to register a fault.
As I am seeing this same behavior when I press pre-charge resistor button before I turn on the main breaker to my SW, I have to wonder ...
I realized without a pre-charge, with LFP batteries unlike LA batteries, some bad stuff is bound to happen either to the MOSFETs of the BMS or the circuitry of the inverter. But is the Clicking and Fan Pulsing also doing harm?
But my question is this, specific to Schneider Inverters ~ the XW and SW. As @Koldsimer pointed out in post 1 of this thread ...
I turned the dc breaker on and the inverter began clicking and the fans began pulsing like the unit was trying to power up.
My assumption is the XW is "starved" for current or power and is pulsing because it is not getting enough to turn on? If I recall @Koldsimer did not get a low voltage fault at the XW because it never even got enough power to register a fault.
As I am seeing this same behavior when I press pre-charge resistor button before I turn on the main breaker to my SW, I have to wonder ...
1. how do we know the inverter is being pre-charged in this state? Should I attach a clamp meter to the resistor lead to see if and how long it takes for the current to drop to Zero (0) current?
2. how long should I hold the button?
3. does this pulsing and clicking do harm to the internals and / or contractors in the SW / XW inverters?
I realized without a pre-charge, with LFP batteries unlike LA batteries, some bad stuff is bound to happen either to the MOSFETs of the BMS or the circuitry of the inverter. But is the Clicking and Fan Pulsing also doing harm?