2006 Prius losing power on Hills

2006 Prius with 130,000 miles. Runs great around town and has power and fast acceleration, but has a problem of not enough power to climb hills, pops out of cruise and runs at 4000 to 5000 + RPM. Its like the MG stop working and it drains the battery to nothing. Prior to this I could climb the same hills without this loss of electrical power. I thought it was a drive battery unable to hold a charge and I recently replaced it with a new Toyota Prius remanufactured battery at the dealer. This doesn't solve the problem.
The battery display has 8 bars and I'm usually running in the 4-6 range. Never in the 7 or 8 bar green zone unless driven downhill. Very seldom will it get into the green zone around town, but it does on occasion.
If I take it on the freeway at 65 to 70, the battery slowly discharges into the 1 or 2 bar violet and stays their, yet it shows a yellow charge from the generator to the battery, but never really increases. This on a relatively flat drive. At the next freeway exit coast off and the battery bar increases very fast back into the 6-7 bar range.

My thought is the MG 1 or 2 are not charging properly when cruising at highway speeds and will not charge fast if at all, and when driving up a hill the MG 1 or 2 is draining the battery extremely fast as if it's almost shorted but will give power for a shorter then normal hill climb. I get electrical boost until the battery hits the bottom battery bars, then it turns of the cruise and drops the electrical power boost. Then its all high reeving engine power.. I loss speed and I need to move into the slow truck lane and the car slows to 35-40 with the engine running at high RPM. When I pull off the freeway at the next exit, stop, then hit the gas to drive off, the engine has a delayed reeving action and takes seconds to increase with the pedal pushed. This is not the way it did drive on the same roads. The route is I-80 Reno to Sacramento via Donner pass. I could cross that mountain and never lost power and cruised at 65 on cruise control.

My guess is the electric MG 1 & 2 is at fault as I have a new battery. No engine codes appear so the dealer will not work on it until a code is thrown by the system. Any help would be appreciated. My next step is new transmission as my own trouble shooting by part replacement. The dealer just doesn't know how to troubleshoot a symptom, unless they have some warning codes. Help.

 

They said they don't sell new ones, but its Toyota with new cells. I guess its the case with new parts.

 

Who has techstream, the dealers. 2 dealers only deal with codes and warning, and as I get none they do nothing nore have they suggested this approach.

 

Ok they installed a G95104703184 : REMAN HVB, GEN 2 PRI

 

Battery installed at 131, 997, and now have 137, 557

 

Assuming the battery is good, what causes loss of power in climbing hills, and never charging even when the MFD shows its charging for extended distances on flat areas. Intown 35-55 it charges and works like it always did. The hills that are problems never were problems to climb until recently so I replaced the battery assuming it was not holding a charge. After replacing it with a New rather then the original older battery with what they said was a Toyota remanufacture battery, the problem still exists. Is fells like its not charging strong enough to recover the SOC. MY guess is the MG1 or MG2 when it generates power to the drive battery is to little to recover the lost power.