PWM charger so slow
So I bough a few days ago a 300W solar pack.
- 2 x 150W 12V panels connected in parallel
- One 40amps PWM charger (the common blue one)
- One 1500W pure sine wave inverter
- 180AH Lead Deep Cycle battery
For the first day everything worked great as the batery full. As the days were passing, the charger couldn't even make it to 12.5V in full hot summer sun throughout the day. I started charging at 13:00pm at 12.3V and at 19:00 where I turned the panels to stare directly at the sun the voltage went up to 12.6 barely. Under normal condition, I think It should have made it to at least 13.5V right ? (the inverter was shut down to prevent losses during the charging state)
What worries me, it's the PWM charger. The LCD arrow that is next to the solar panel and goes to battery is blinking. In the manual it says when it is blinking it means it's in float charging mode. If I am not mistaken, float mode is enabled when the battery reaches at 13.7V so it starts charging slowly as it's almost full ? Why then it uses float mode while it is in so low voltage ?
Yesterday in fact the inverter shut down due to low battery voltage. The float mode is set in the PWM charger at 13.7V. This is a point that starts going into float mode ? Maybe I need to set it much lower so it goes into bulk mode ? Bulk mode is the "arrow" staying on the screen, not blinking. Never seen it staying static at the screen....
Maybe I should change the battery type ? Now it's currently at 601...
Thank you for your assistance.