The slide has always “struggled” coming up “over the hump” while retracting on our 2012. That said, it does come in without help.
First thought, your batteries may be marginal or the battery terminals may be corroded. Corrosion or deterioration of the interconnect wiring may also contribute. Although shore power or generator power may help some, I believe the slideout motor draws significantly more power when working hard than the converter supplies. I think a good supply from the house batteries is required. A volt meter on the batteries and/or on the slideout motor may help diagnose.
Second thought - I periodically get under mine with the slideout extended and lubricate the bottom of the slideout where it contacts while coming in. There are “scrape marks” on the bottom of the slideout. Special dry lubes for this purpose are available. The dry lubes are desirable to avoid having dirt and grime collect. If someone did use a “wet lube” which collected grime, cleaning that off and re-lubing might help.
Similarly, good to lube all the slideout mechanics (gear racks, gears, etc) under the slideout. The motor and gearbox are above the propane regulators.
Finally, on mine, when I bought it new the slideout motor was improperly welded to the frame and broke loose after about five actuations. Once it broke loose, it cocked and did not properly retract the slideout. Had an RV service place re-weld it.
FYI
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JLeising
2012 Solera "S"
Calif SF Bay Area
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