The Solar-One battery with HuP Technology is optimized for renewable energy systems. It has a slightly enlarged epoxy-coated steel case that allows cell removal so it can be installed by parts without a forklift or crane. Solar-One batteries are designed with 0.310" thick positive plates and a patented technology that allows them to be warranted for 2100 cycles to 80% depth of discharge. The 10-year warranty, 7-year free replacement and 3 years prorated is the best in the industry. Each Solar-One battery is made up of six 2 VDC cells and comes with stainless steel hardware, lead-plated copper busbars, a cell-lifting strap and an operator/installation manual. Order two for 24 VDC systems or four for 48 VDC systems. Please allow up to 8 weeks for delivery. Free shipping to commercial locations in the continental USA.