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The Go Power! 225Ah 6 Volt AGM Deep Cycle Battery (model GP-AGM-225-6V) is a Sun Cycle absorbent glass mat battery in the BCI GC2 golf cart size. It's a sealed, valve-regulated (VRLA) lead-acid battery designed for solar and inverter use, with no water to add.
Wire two in series for a 12V, 225Ah bank, or build two series pairs and connect them in parallel for 450Ah. Go Power designed it for RV, marine and off-grid house banks, and as an upgrade for existing lead-acid battery banks.
Go Power rates the battery at 225Ah over 20 hours, to 1.75V per cell at 77°F (25°C). Reference capacity is 214.3Ah over 10 hours, 191.3Ah over 5 hours and 168.8Ah over 3 hours, so faster discharges give you less total capacity.
Absorbent glass mat separators hold the electrolyte inside an ABS case and cover. Go Power lists the battery as maintenance-free, spill-proof, leak-proof and 100% recyclable, and it's built for repeated charge and discharge duty rather than engine starting.
At 77°F (25°C), Go Power rates about 350 cycles at 100% depth of discharge, about 650 at 50% and about 1,650 at 30%. Shallow daily cycling gets you the most life from the battery.
Maximum discharge current is 2,250A for 5 seconds, and the battery is rated at 1,035 cold cranking amps. Internal resistance is 1.9 milliohms or less at full charge. Maximum charging current is 67.5A.
For cycle use, charge each battery at 7.3V to 7.4V at 77°F (25°C) with an initial charging current under 30A, which is 14.6V to 14.8V for a series pair. Float is 6.80V to 6.90V per battery, or 13.6V to 13.8V per pair. Go Power lists temperature compensation of -3mV/°C per cell for cycle charging and -4mV/°C per cell for float.
Monthly self-discharge is under 3% at 77°F (25°C), and the battery can be stored for up to 6 months at that temperature before it needs a freshening charge. Go Power says to charge the batteries before use.
RV house bank. Two in series replace a pair of GC2 batteries in an existing tray. Go Power estimates that one series pair discharged to 50%, with about 1,215Wh usable, runs a 50W average 12V compressor fridge about 24 hours or 20W of LED lighting about 61 hours.
Solar storage. Charge the bank from Go Power! solar panels through a charge controller set to AGM.
Marine and off-grid banks. Use series pairs for a boat's house power or a cabin's solar storage, and add pairs in parallel for more capacity.
Go Power's comparison lists a pair of these batteries at 2,700Wh with about 50% usable and 70.5 lb each, rated about 650 cycles at 50% depth of discharge. The 12V 100Ah AGM (Group 31) is listed at 1,200Wh with about 50% usable, 67.5 lb and about 1,100 cycles at 50%. The 6V pair gives you more than twice the stored energy in a GC2 tray; the 12V battery fits where you have room for only one Group 31 case.
In the same comparison, the 100Ah Advanced Lithium is listed at 1,280Wh with close to 100% usable, 3,000 cycles and 28.7 lb, with Bluetooth and self-heating. It needs a lithium charge profile, while this AGM pair charges on a standard AGM setting.
To make 12V, connect the inner positive and negative terminals of the two batteries together, then run the outer terminals to your busbars. Never connect new batteries to old ones, and charge each battery to at least 6.5V before connecting them. Torque the terminals to 11 to 14.7 Nm (97.3 to 130 in-lb), keep battery-to-busbar connections equal in length and gauge, lock every connection against vibration, and fuse each device connection. Install the batteries upright only, never upside down or on their side, with at least 1 in between them and from the enclosure walls.
Use a charger with an AGM setting that carries the safety marks for your country, such as UL or CSA. The battery label says not to charge it in a sealed container and to ventilate well in an enclosed space and while charging. Store the batteries fully charged in a dry, well-ventilated place under 30°C (86°F), away from heat, sparks and open flame, and recharge after 6 months.
Wire them in series. Connect the positive terminal of one battery to the negative terminal of the other; the remaining positive and negative terminals become your 12V bank. Two in series give 12V at 225Ah.
There's no watering. Keep the battery clean and the terminals clean and dry to avoid corrosion, avoid heavy discharges, and give it a refresh charge during long storage.
No. Go Power's quick start guide says Sun Cycle AGM batteries must be installed upright and may not be mounted upside down or on their side.
Go Power suggests planning on about 50% for everyday use. Cycle life is about 650 cycles at 50% depth of discharge versus about 350 at 100%.
The Go Power! 225Ah 6 Volt AGM Deep Cycle Battery gives you a sealed, maintenance-free way to build a 12V house bank in GC2 size, charged on a standard AGM profile. If you'd like help planning a series pair, sizing a bank or choosing a charge controller, the Outbound Power team is happy to help.
Go Power! 225Ah 6 Volt AGM Deep Cycle Battery Specifications |
|
|---|---|
| Model | GP-AGM-225-6V (listed as GP-AGM-224-6V) |
| Battery | |
| Technology | AGM, VRLA deep cycle battery |
| Nominal Voltage | 6 V |
| Nominal Capacity | 225 Ah |
| Rated Capacity | 225 Ah at 20 hr rate to 1.75 V per cell at 77°F (25°C) |
| Reference Capacity (C10) | 214.3 Ah |
| Reference Capacity (C5) | 191.3 Ah |
| Reference Capacity (C3) | 168.8 Ah |
| Cycle Life (77°F / 25°C) | ~350 at 100% DoD; ~650 at 50% DoD; ~1,650 at 30% DoD |
| Internal Resistance | ≤1.9 mΩ (full charge at 77°F / 25°C) |
| Charge and Discharge | |
| Cycle Use Charge Voltage | 7.3 V to 7.4 V at 77°F (25°C) |
| Cycle Use Initial Charging Current | Less than 30.0 A |
| Cycle Use Temperature Compensation | -3 mV/°C/cell |
| Float Charging Voltage | 6.80 V to 6.90 V at 77°F (25°C) |
| Float Temperature Compensation | -4 mV/°C/cell |
| Series Pair Charge Voltages | 14.6 V to 14.8 V cycle; 13.6 V to 13.8 V float |
| Standby Initial Charging Current | No limit |
| Maximum Charging Current | 67.5 A |
| Maximum Discharge Current | 2,250 A (5 s) |
| Cold Cranking Amps (CCA) | 1,035 |
| Nominal Operating Temperature | 77°F ±5 (25°C ±5) |
| Charge Temperature | 32°F to 122°F (0°C to 50°C) |
| Discharge and Storage Temperature | -4°F to 140°F (-20°C to 60°C) |
| Features | |
| Separator | Absorbent glass mat (AGM) |
| Construction | Sealed, maintenance-free, spill-proof and leak-proof (VRLA) |
| Electrolyte | Diluted sulfuric acid |
| Self-Discharge | Less than 3% per month at 77°F (25°C) |
| Storage Before Freshening Charge | Up to 6 months at 77°F (25°C) |
| Orientation | Upright only (not upside down or on its side) |
| 12V Bank | 2 in series = 12 V, 225 Ah; 2 series pairs in parallel = 12 V, 450 Ah |
| Recommended Storage | Fully charged, dry and well-ventilated, under 30°C (86°F) |
| App Monitoring | With Go Power! smart shunt (sold separately) and Go Power! Connect app |
| Recyclable | 100% |
| Physical | |
| Dimensions (L x W x H) | 9.57 x 7.36 x 10.8 in (243 x 187 x 275 mm) |
| Total Height | 10.8 in (275 mm) |
| BCI Group Size | GC2 |
| Weight | 70.5 lb (32 kg) |
| Terminals | F14 (M8) |
| Terminal Torque | 11 to 14.7 Nm (97.3 to 130 in-lb) |
| Case and Cover | ABS |
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