question

Rabeendra Tilakaratne avatar image
Rabeendra Tilakaratne asked

MPPT power input for smart solar 250/70

I need to use Canadian solar 550Wp 8 panels in two strings. PV open circuit Voltage will be 198.4V and the current will be 28A max total. I can limit the MPPT output to 60A. (I am using 15kWh LiFePo4 battery which charging current can go up to 120A) Can I use Smart Solar 250/70 MPPT for this ? I am in Sri Lanka and the irradiation is high for 365 days.

MPPT SmartSolar
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
Alexandra avatar image
Alexandra answered ·

@Rabeendra Tilakaratne

8x 550w is 4400W. @48v that is 91A. @55v that is 80A so might see some power clipping depending on how hot your panels get.

As for damage to the mppt, you are well within specifications so can use it. You would not need to limit its output for your battery.

1 comment
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Rabeendra Tilakaratne avatar image Rabeendra Tilakaratne commented ·
Thank you Alex for your prompt response. I am planning to use 250/70 MPPT. But I will check the possibility to find 250/85 also. If so I am on the safe side.
0 Likes 0 ·