WindyNation 400 Watt (4pcs 100W) Solar Panel Kit with MPPT TrakMax 30L Charge Controller Complete Kit for RV's, Boats and Off-grid Applications 400 Watt solar charging kit provides up to 400 watts of clean, free, renewable power Designed for RV's, cabins, homes, boats, back-up and remote power use. Compatible with 12, 24, and 48 volt battery banks. Perfect kit for 12/24/48V battery charging (Lead Acid, AGM, Gel) - see Owner's Manual for instructions MPPT TrakMax 30L Controller, with 30% power boost, can provide 1500-2400 Watt Hours of power per day (depends on sunlight availability) 4 100W Panels, TrakMax 30L MPPT Charge Controller, 40ft 12AWG UL Cable, MC4 Connectors, Z-Brackets