Technical FAQs

Ask a Question

MPPT not charging in good solar conditions

Issue:
Good PV voltage is present but unit not charging bank

Product Line:
MPPT80 or MPPT60

Environment:
MPPT60 or MPPT80. PV voltages within MPPT range. Battery level below float

Resolution:
Set charge cycle to 3 stage.  The default setting is for 3 stage.

Cause:
In 2 stage charge cycle, unit will not start to charge until battery voltage drops to below the RECHARGE VOLTS setting.  2 stage charging only allows the controller to do bulk and absorb.  After absorption, the controller will shows as "not charging"  Setting to 3 stage, will allow the charge controller to do float.  This will maintain the batteries at full, and allow the controller to ramp up as necessary to produce power for loads or sell-back.
Was this helpful?
What can we do to improve the information ?