Conext XW6848 with PDP, SCP, 80/600 controller, 60/150 controller and Conext battery monitor
21 SW280 panels on Schletter ground mount
48v Rolls 6CS 27P
2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 700 ah @24 volt AGM battery bank. Plenty of Baja Sea of Cortez sunshine.
Adding ice means more than just $2 a day. it means the time and fuel stopping every day during the warmer months to purchase and add the ice.The largest roadblock to using a water bath (chilled, iced, or just water out of the hose) is building a water tight box which can be easily filled and drained that also has a vent fan, screened air intake holes, and a lid. The box needs to withstand water pressure pushing out on the sides for 10+ years, have a liner than can resist 35% sulfuric acid (EDM is best but PVC should last over 10 years in light acid) and a drain that can also withstand being in a low concentration of acid for 10+ years. If there is a problem with the drain or liner that box full of batteries is too heavy to move so it needs to be built right the 1st time. In my case I do worry about the $20 pump holding up since I don't know what plastic it is made of or how the vinyl insulated cord will hold up but the tiny bit of acid diluted in 70 gallons of water shouldn't be a problem. The water lines are also heavy vinyl.