So I have a Bosch L5077 180A 12v deep cycle sealed Pb battery for my solar setup. I bought it recently (2 weeks ago) but since the weather was rainy the last 2 weeks and the solar panels didn't produce any significant power, I keep charging it on-grid with a 10A 3-stage smart charger.
Assuming that this battery can hold a capacity of 180AH which is around 2kWh of energy, the battery is almost fully drained (11.3v) before even consuming 1kWh or so.
So, in 6 hours of usage which usually reaches the threshold in which the inverter shuts down, I'm using a 43'' 50w LEDTV, one 32'' 35w LEDTV, a laptop charging (60w/hour) and few home led lights opening now and then.
With a quick calculation we have :
43'' LEDTV 50w x 6 hours = 300W
32'' LEDTV 35w x 6 hours = 210W
Laptop charger 60w x 6 hours = 360W
Inverter 1500W consumption, let's say 30w x 6 hours = 180W
And the lights which shouldn't be more than 100watts total in those 6 hours as I don't use much the lights.
The result is 1050w of energy consumed and the battery is fully drained.
Where did the rest of 85 amps went to ? The charger is always charging fully the battery, when the battery is fresh charged it will show a value of 13.6V in PWM charger, while 2 hours later it will show between 13.4-13.5V so I guess the battery can't be damaged so soon.
Any ideas ?