Epoch Marine 12V 172Ah Group 31 vs Renogy 100Ah 12V LiFePO4
Epoch Marine 12V 172Ah Group 31 (172Ah) vs Renogy 100Ah 12V LiFePO4 (100Ah) compared spec-by-spec. Cycle life, BMS, pricing, pros, cons, and our verdict on which off-grid battery to buy.
| Specification | A — epoch Epoch Marine 12V 172Ah Group 31 8.3/10 $899
Price unavailable
| |
|---|---|---|
| Capacity Ah | 172 | 100 |
| Voltage | 12 | 12 |
| Battery Type | LiFePO4 | LiFePO4 |
| Group Size | Group 31 | — |
| Energy Wh | — | 1,280 |
| Cycle Life | — | 4,000 cycles |
| Weight | — | 26 lbs |
| Dimensions | — | 11.4 x 6.8 x 7.4 in |
| Bms Included | — | Yes |
| Max Continuous Discharge A | — | 100 |
| Max Charge Rate A | — | 50 |
| Cold Temp Cutoff | — | 32F (0C) |
| Operating Temp | — | 32-131F |
| Series Parallel | — | Yes |
| Ip Rating | — | IP65 |
| Warranty | — | 5 years |
Buy the Epoch Marine 12V 172Ah Group 31
Best prices · Updated hourly
Buy the Renogy 100Ah 12V LiFePO4
Best prices · Updated hourly
Who Should Buy the Epoch Marine 12V 172Ah Group 31?
The Epoch Marine 12V 172Ah Group 31 is built for marine, trolling motor. Its 172Ah at 12V gives you 2.1kWh of usable energy — suitable for a standalone house battery or small bank.
Key advantages include: group 31 case drops into standard marine battery trays; 172ah at 12v for trolling motors and marine house loads; purpose-built marine sku from epoch's 2026 lineup.
Priced at $899, the Epoch Marine 12V 172Ah Group 31 scores 8.3/10 overall — a strong showing across the board.
Who Should Buy the Renogy 100Ah 12V LiFePO4?
The Renogy 100Ah 12V LiFePO4 is built for rv house battery, off grid cabin bank, marine. Its 100Ah at 12V gives you 1.2kWh of usable energy — suitable for a standalone house battery or small bank.
Key advantages include: ip65 waterproof rating — rare for this price range; built-in bluetooth monitoring via renogy dc home app; trusted renogy ecosystem integrates with their solar controllers. At 26 lbs, it's manageable for a one-person install.
Priced at $280, the Renogy 100Ah 12V LiFePO4 scores 8.4/10 overall — a strong showing across the board.
How Do the Specs Compare?
Capacity: The Epoch Marine 12V 172Ah Group 31 offers more amp-hours at 172Ah vs 100Ah for the Renogy 100Ah 12V LiFePO4. More Ah means more runtime before hitting the safe depth-of-discharge floor — critical for overnight draws and cloudy multi-day stretches.
Chemistry: Both batteries use LiFePO4 chemistry, so cycle life and thermal stability are in the same ballpark — the specs and price become the main differentiators.
Price: The Renogy 100Ah 12V LiFePO4 costs $280 versus $899 for the Epoch Marine 12V 172Ah Group 31 — a $619 difference. For long-term value, divide the price by the rated cycle life to get a true cost-per-cycle comparison.
🏆 Our Verdict
Choose the Epoch Marine 12V 172Ah Group 31 if you need maximum capacity (172Ah vs 100Ah) and strong performance for its class.
Choose the Renogy 100Ah 12V LiFePO4 if you prioritize value (typically $619 less) .
Related
Go Deeper
More Comparisons