The 12V 135Ah LiFePO4 Battery is a 1,728 watt-hour block on M8 terminals, rated IP65. It sits between the 120 and 150Ah house batteries, sized for a mid-size travel trailer or a fifth-wheel that has outgrown a 120.
The Trailer Day
A day and a half of house power
A mid-size trailer draws 90 to 110 amp-hours across a day: the fridge at 30 to 60, lights and a fan, a water pump, the electronics and a small inverter for coffee. 1,728 watt-hours cover a day and a half with reserve for a gray morning. The 135-amp continuous rating runs a 1,500-watt inverter for the trailer’s larger loads.
The Upgrade
From 120, and from a golf-cart pair
Moving up from a 120Ah block adds a useful margin without the size and weight of a 150. A single 135 replaces the pair of 6-volt golf-cart batteries many trailers use for house, at a third of their weight, with the full capacity usable rather than the half a lead pair gives.
Solar And Bank
Panel and parallel
On a solar trailer a 200 to 400-watt array refills the daily draw in good sun. Two blocks in parallel make a 270-amp-hour bank for a longer stay off grid, brought to the same resting voltage before the join.
Data
Datasheet
| Model | DC12-135 |
|---|---|
| Nominal voltage | 12.8V |
| Capacity | 135Ah |
| Energy | 1728Wh |
| Charge voltage | 14.6V |
| Discharge cutoff | 10V |
| Continuous discharge | 135A |
| Peak discharge | 300A (5s) |
| Cycle life | ≥4,000 cycles @80% DOD |
| Weight | ≈14.5 kg |
| Dimensions | 330 × 172 × 220 mm |
| Terminals | M8 |
| Operating temperature | Discharge -20~60°C / Charge 0~45°C |
| Protection rating | IP65 |
| Certification | UN38.3 / CE / FCC / RoHS |
Fit
Charging
Run a 14.6-volt lithium charger, an LFP solar controller or a DC-DC unit off the tow vehicle. A parallel pair makes a 270-amp-hour bank when the two resting voltages match.
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