Solar problems

Jesse

Member
Joined
Jan 22, 2026
Messages
5
Fluid Motion Model
R-27 Classic
Hull Identification Number
FMLT2723K617
Vessel Name
Sea Star
Solar has quit working on our R-27. Remote meter is showing 30. Can’t locate the solar controller.
 
Solar has quit working on our R-27. Remote meter is showing 30. Can’t locate the solar controller.

It sounds like you have a NW edition, your solar controller is the starboard lazarette, aft, starboard side. Next to the engine starting battery.
 
It sounds like you have a NW edition, your solar controller is the starboard lazarette, aft, starboard side. Next to the engine starting battery.
We are not a NW edition. There is a generator in that position. Thanks for trying to help.
 
Sorry. Our generator is on the port side, but so are all of our batteries. The controller on the starboard side is for the autopilot.
 
Sorry. Our generator is on the port side, but so are all of our batteries. The controller on the starboard side is for the autopilot.
You haven’t indicated what year your R27 is. Do you have the classic R27 with a diesel inboard, or an R27 with an outboard engine? The device you’re most likely looking for will say “SunSaver Duo” on it.

It probably looks similar to this.

 
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if you do have sunsaver please do change it out for a blue victron MPPT controller. the sunsaver is losing you power as a PWM type device.
 
if you do have sunsaver please do change it out for a blue victron MPPT controller. the sunsaver is losing you power as a PWM type device.
I have the sunsaver, and had fault lights, so pulled all the wires, and reset for 90% house, and 10% #2 battery. Solved all the problems for my 12 V solar. Best deal was zero cost. Don't worry about windless/thruster battery as Engine is always running when that battery is used.
 
if you do have sunsaver please do change it out for a blue victron MPPT controller. the sunsaver is losing you power as a PWM type device.
Thanks for the suggestion. With the help o a fellow Ranger Tug owner we solved our problem.
 
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