Reduced solar charge.

Plucka

360 amphr 12 volt lithium batteries -had 1100 watts of solar panels divided over three solar controllers-have just changed to one 30 amp controller with 300 watt panel and four 200 watt panels with one 60amp Renogy solar controller. The problem is the batteries stop charging at only 13.5 volts which is too low for my needs. What is the problem ?

mcgivor

What are te settings of the controllers used?  The value of 13.5V is typical of a float voltage used with lead acid, perhaps there are custom settings which are better suited to the batteries used, however I'm reading between the lines.

Vic

Plucka said:

360 amphr 12 volt lithium batteries -had 1100 watts of solar panels divided over three solar controllers-have just changed to one 30 amp controller with 300 watt panel and four 200 watt panels with one 60amp Renogy solar controller. The problem is the batteries stop charging at only 13.5 volts which is too low for my needs. What is the problem ?

And,  in addition to what mcgivor menitoned:
Many 300 W PVs have 60-cells,   and many 200 watt PVs have 36 cells.  If this is the case with your PVs,  the single Charge Controller may not be able to make good use of all of the available PV power.

What are the specs of each set of PVs on your system?

Vic

Plucka

In my lack of know how I must have hit the right button -everything seems to be working now. Thanks for the replies.