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MPPT Solar Controller Owners Manual Rev. 1.3.
2.2 PV ARRAY REQUIREMENTS
(1) MAXIMUM PV ARRAY POWER
(1) – Enerdrive MPPT controllers include charge current limiting allowing the controller to limit the
charging current if the incoming PV array exceeds the controllers maximum charging output. This allows
the controller to protect internal charging components avoiding damage from oversized PV arrays. This
function also allows for overdriving of the solar controller increasing the amount of time the controller is
receiving its peak harvest from the PV array.
MPPT controller overdrive –
*Note:
The recommended maximum solar wattage input for the EN43540 controller is 600 watts 12V.
You can however “overdrive” the MPPT controller. Please note that doing this is partially an economic
decision. You can install more power than the controller can use and this will contribute to better power
availability. Enerdrive suggest a total maximum overdrive of 20% (total 720W). On cloudy (or
intermittent sunny) days there will be little or no power shaving and the extra power will serve the
battery well with more energy harvest earlier and later in the day.*
720w
600w
400w
300w
200w
100w
ow
720w Array
600w Array
EN43540 Maximum Solar Harvest on a 12V System
Peak Sun Hours
Sunrise
Sunset