Sun Xtender PVX-6720T 2V 672Ah Solar Battery - VRLA AGM Deep-cycle

The Sun Xtender PVX-6720T is a 2-volt valve-regulated lead-acid (VRLA) AGM deep-cycle solar battery cell designed for large-scale stationary battery banks in off-grid and grid-tied solar and wind energy storage systems, commercial and industrial installations, cathodic protection, SCADA and RTU infrastructure, island power systems, and remote telecommunications applications.

A division of Concorde Battery Corp. — an industry pioneer in VRLA-AGM battery design since 1987 — Sun Xtender engineered the PVX-6720T on the BCI Group GC2 platform, making it the only 2-volt cell in the Sun Xtender lineup housed in this case size. At 672Ah at the 24-hour rate, the PVX-6720T is a direct sealed AGM replacement for conventional flooded 2V GC2 cells in existing enclosures — eliminating watering, terminal corrosion, and hazardous hydrogen venting without requiring any rack or cabinet modification.

Key Features:

• Unique Group GC2 / 2V Cell Platform — The only 2-volt cell in the Sun Xtender lineup in the GC2 form factor; direct drop-in replacement for flooded 2V GC2 cells in existing enclosures, delivering 672Ah at the 24-hour rate while eliminating watering, venting, and corrosion maintenance with no rack or cabinet modification required
• 4 M8 Terminals — Top-Mounted — Features 4 copper alloy M8 threaded insert terminals on the top face, enabling flexible series string interconnection in multi-cell stationary battery bank configurations; all terminals supplied with silicon bronze bolts, nuts, and washers
• Pure Lead Calcium Grid Construction — Plates are thicker than industry standard for longer cycle life, increased reliability, and greater power output; low impedance AGM design allows excellent charge acceptance with no current limit required when using controlled voltage charging
• PolyGuard® Microporous Polyethylene Separators — Proprietary dual-layer insulation protection shields positive plates against shorting, shock, and vibration; a Sun Xtender exclusive feature not offered by any other manufacturer in the industry
• Non-Spillable VRLA-AGM Design — Valve-regulated, maintenance-free construction eliminates the requirement to monitor and replenish water levels; non-spillable design allows installation in any orientation — upright, on its end, or on its side — without risk of electrolyte leakage, enabling safe installation in enclosed battery cabinets without the forced ventilation systems required by conventional flooded 2V cells
• High-Impact Copolymer Polypropylene Enclosure — Battery cover and container uniquely molded with reinforced copolymer polypropylene featuring thick end walls to prevent bulging under pressure; built to withstand the demands of rugged commercial, industrial, and large-scale stationary energy storage environments
• Hazmat Exempt Shipping — All Sun Xtender batteries ship Hazmat Exempt, simplifying logistics for distributors, dealers, and end users across all shipping channels

The PVX-6720T delivers 672Ah of nominal capacity at the 24-hour rate and scales up to 780Ah at the 100-hour rate, making it well suited for the slow, sustained discharge cycles typical of large stationary off-grid solar storage arrays and commercial backup power applications. At the 1-hour rate the battery delivers 429Ah per cell, confirming its ability to supply very high current for shorter duration loads in large inverter and UPS systems. The low impedance AGM construction ensures excellent charge acceptance across the full range of charge rates with no current limit required when using a properly regulated charge source — a critical advantage in large commercial solar and wind systems where charge current varies significantly throughout the day.

Sun Xtender's proprietary PolyGuard® separator system provides a level of plate protection not available from competing AGM battery manufacturers, directly contributing to the PVX-6720T's long cycle life and resistance to vibration and shock loads common in commercial and industrial stationary installations. As a 2-volt cell, the PVX-6720T is assembled in series strings to achieve any desired system voltage — 6 cells yield 12V, 12 cells yield 24V, and 24 cells yield 48V — with the full 672Ah capacity available at every voltage. The GC2 footprint is among the most widely distributed battery enclosure standards in off-grid solar, making the PVX-6720T a direct sealed AGM upgrade for the large installed base of existing GC2 battery enclosures, trays, and brackets. Two rope lifting handles facilitate safe handling and positioning of the 70 lb unit during installation. All Sun Xtender batteries ship Hazmat Exempt, eliminating the regulatory complexity and additional freight costs associated with non-exempt lead-acid battery shipments.

Technical Specifications: