Mine came with one. I asked the dealer to deduct the price and I put two very good deep cycles in. Works great for dry camping.
2011 Jayco Eagle Super Lite Ht 265RKS
Reese Revolution Hitch
2003 F250 Super Crew Power Stroke 4x4
2014 Lund 1800 Tyee 175 Merc Verado 9.9 Pro Kicker