Description
xVictron Energy 12V 165Ah AGM Deep Cycle Battery (M8 Threaded Terminals)
The 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.
Key Features
- 12V nominal voltage with 165Ah capacity, providing substantial energy storage for deep cycle use.
- AGM (Absorbent Glass Mat) construction: sealed, valve-regulated and maintenance-free with no acid spillage risk.
- M8 threaded insert terminals allow secure, torqued bolt connections rather than clamp-style terminals.
- Deep cycle design tolerates repeated charge and discharge cycles, making it suitable for daily solar cycling.
- Victron Energy manufacture, compatible with the full range of Victron charge controllers, inverter/chargers and battery monitors.
- Weight of 44.5 kg reflects the high lead content associated with genuine deep cycle AGM construction.
Product Overview
AGM 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.
The 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.
The 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.
Specifications
- SKU: BAT412151085
- Nominal Voltage: 12V
- Capacity: 165Ah
- Battery Type: AGM Deep Cycle, Valve-Regulated (VRLA)
- Terminal Type: M8 threaded insert
- Weight: 44.5 kg
- GTIN: 8719076037040
Applications
- Off-grid solar storage systems with daily charge and discharge cycling.
- Marine house battery banks where sealed construction is required.
- Motorhome and vehicle leisure battery installations.
- UPS and backup power systems requiring a maintenance-free sealed battery.
- Generator start and support applications.
- 12V battery banks (single unit or wired in series/parallel for higher voltage or capacity).
What Is Included
- 1 x Victron Energy 12V 165Ah AGM Deep Cycle Battery (M8 threaded terminals)
Installation Notes
This 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.
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using our UPS account (we will provide you with a return label)
Please keep in mind the following:
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a €10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us by a tracked/recorded delivery service. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar website (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.