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Solar Charging Batteries on BlueROV2

(Brent) #1

Covering a BlueROV2 with solar panels, to extend operational duration in sunlight, requires a power connector to charge up the batteries. There are earlier forums about the lack of battery protection from under charging (in February). Does one of its subsystems already include a battery charging connector that this project could use?

(Willian Galvani) #2

Hello Brent,

Welcome to the Blue Robotics forums!

Do you plan to just leave it floating and charging?
The Rov has an area of 457 mm x 338 mm = 0.154 m²
Maximum sun radiance is 1120 W/ m²
Maximum efficiency solar cell I could find is 22%.
So covering the top of the ROV with these solar cells would output 0.154*1120*0.22 = 40 W
In this best case scenario our battery would take 6h to charge.

If you want to increase autonomy and don’t want to deal with multiple batteries, maybe power over tether is a better solution.

1 Like
(Brent) #3

William,

I appreciate that and this is just an experiment with some new solar cells that are conformal and a bit higher efficiency. My main question is whether I need to add a separate charging circuit or if that connection is already built in.

Regards,
Brent

(Willian Galvani) #4

Yes, you should add your own circuit to charge the battery. Currently we only monitor total voltage and an estimated charge state integrating the current passing through the power module.