{"product_id":"victron-12v-165ah-agm-deep-cycle-battery-m8","title":"Victron 12V\/165Ah AGM Deep Cycle Batt. (M8) - BAT412151085","description":"\u003ch1 style=\"color: #f87c24;\"\u003eVictron Energy 12V 165Ah AGM Deep Cycle Battery (M8 Threaded Terminals)\u003c\/h1\u003e\n\n\u003cp\u003eThe Victron Energy 12V 165Ah AGM Deep Cycle Battery is a sealed, maintenance-free lead-acid battery designed for cyclic applications in solar, off-grid, marine and backup power systems. With M8 threaded insert terminals, it is suited to professional installations where secure, bolt-down connections are required.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e12V nominal voltage with 165Ah capacity, providing substantial energy storage for deep cycle use.\u003c\/li\u003e\n  \u003cli\u003eAGM (Absorbent Glass Mat) construction: sealed, valve-regulated and maintenance-free with no acid spillage risk.\u003c\/li\u003e\n  \u003cli\u003eM8 threaded insert terminals allow secure, torqued bolt connections rather than clamp-style terminals.\u003c\/li\u003e\n  \u003cli\u003eDeep cycle design tolerates repeated charge and discharge cycles, making it suitable for daily solar cycling.\u003c\/li\u003e\n  \u003cli\u003eVictron Energy manufacture, compatible with the full range of Victron charge controllers, inverter\/chargers and battery monitors.\u003c\/li\u003e\n  \u003cli\u003eWeight of 44.5 kg reflects the high lead content associated with genuine deep cycle AGM construction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eAGM batteries use a glass mat separator to hold the electrolyte in place, eliminating free liquid acid. This makes them safe to install in enclosed spaces, cabinets and vehicle compartments where a flooded battery would not be appropriate. The valve-regulated design means no topping up is required and gas emissions under normal operation are minimal.\u003c\/p\u003e\n\n\u003cp\u003eThe 165Ah capacity at 12V gives a nominal 1.98kWh of stored energy. In practice, usable capacity depends on depth of discharge: AGM batteries are typically cycled to 50% depth of discharge to preserve cycle life, giving approximately 82Ah or around 985Wh of usable energy per cycle. For deeper cycling or longer cycle life, Victron's lithium battery range should be considered instead.\u003c\/p\u003e\n\n\u003cp\u003eThe M8 threaded insert terminals are a key practical detail. They accept M8 bolts directly into the battery case, providing a mechanically secure connection that resists vibration and loosening over time. This is particularly relevant in mobile, marine and generator-backed installations. Ensure correct torque is applied during installation to avoid terminal damage.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSKU: BAT412151085\u003c\/li\u003e\n  \u003cli\u003eNominal Voltage: 12V\u003c\/li\u003e\n  \u003cli\u003eCapacity: 165Ah\u003c\/li\u003e\n  \u003cli\u003eBattery Type: AGM Deep Cycle, Valve-Regulated (VRLA)\u003c\/li\u003e\n  \u003cli\u003eTerminal Type: M8 threaded insert\u003c\/li\u003e\n  \u003cli\u003eWeight: 44.5 kg\u003c\/li\u003e\n  \u003cli\u003eGTIN: 8719076037040\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOff-grid solar storage systems with daily charge and discharge cycling.\u003c\/li\u003e\n  \u003cli\u003eMarine house battery banks where sealed construction is required.\u003c\/li\u003e\n  \u003cli\u003eMotorhome and vehicle leisure battery installations.\u003c\/li\u003e\n  \u003cli\u003eUPS and backup power systems requiring a maintenance-free sealed battery.\u003c\/li\u003e\n  \u003cli\u003eGenerator start and support applications.\u003c\/li\u003e\n  \u003cli\u003e12V battery banks (single unit or wired in series\/parallel for higher voltage or capacity).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eWhat Is Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Victron Energy 12V 165Ah AGM Deep Cycle Battery (M8 threaded terminals)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eThis battery should be installed by a qualified electrician or experienced installer familiar with lead-acid battery systems. Ensure adequate ventilation even with VRLA batteries, as hydrogen gas can be released under fault or overcharge conditions. Use the correct M8 bolt length and apply the manufacturer-specified torque to avoid cracking the terminal insert. When wiring multiple batteries in series or parallel, use cables of equal length and cross-section to balance the bank. Charge parameters must be set correctly on the charger or inverter\/charger: use Victron's published AGM charge profile to avoid undercharging or overcharging, both of which reduce cycle life significantly.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":59866747371854,"sku":"BAT412151085","price":307.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/3698\/8238\/files\/VoltaconSolar_-_BAT412151085_-_12V-165Ah_AGM_Deep_Cycle_Batt._M8.webp?v=1781200226","url":"https:\/\/voltaconsolar.com\/products\/victron-12v-165ah-agm-deep-cycle-battery-m8","provider":"VoltaconSolar","version":"1.0","type":"link"}