- Dec 15, 2018
It's an interesting topic....Will do. And I appreciate the knowledge. I thought I was aware that the solar voltage needed to be higher than pack voltage. Now I know it needs to be higher by a bigger margin.
I believe I have related issues with my trailer panels -> MPP Solar 3048LV -> 48v battery bank. The performance is often 500w out of 1200w of panels. I have 2s2p and the MPP Voltage shows right at 60-61v per MPP Solar readings and as I get >4.1v/cell * 14 = >57.4v the gap is very narrow. 61 -> 58 is only 3v difference and with fuzzy measurements it could be 1v in actuality and that's may not be enough for hi-amp charging.
I've noticed that at HI AMPs the charging voltage of my Midnite Classics -> battery can reach >2v difference per what Midnite reports and what Batrium reports. The higher voltage helps pump in hi amps.
ALSO, a small tidbit I saw for MPP Solar 3048LV is they say Panel voltage *minimum* is 60v . Not sure if your Victron has a minimum voltage you're coming close to - but it's an interesting point in that it's not just the battery voltage but the MPP Solar itself has a min voltage.