I installed this 12V 165Ah battery under the rear seat of my camper, where the old lead-acid setup used to be. The space is fairly tight, so I measured everything carefully before ordering. The battery fit well, although I did spend some time rerouting the positive cable and cleaning up the existing wiring so nothing was under tension. I also added a proper hold-down strap and secured the main fuse close to the battery. At roughly 34 lbs, it was much easier to position than the two lead-acid batteries I removed.
We have now used it on a four-day trip without shore power. It ran the compressor refrigerator, water pump, lights, roof fan, diesel heater at night, phone chargers, and a small inverter for a laptop and coffee grinder. On a normal day, our consumption was around 30–40Ah. We also had a 300W solar panel connected, which replaced most of that during sunny weather. After one cloudy day and a cold night, the Bluetooth app showed 47% remaining the following morning, so there was still a comfortable reserve.
The voltage remained stable when the water pump and inverter were running together, and I did not see any BMS warnings or unexpected shutdowns. I like being able to check the SOC, current, and temperature from inside the camper instead of lifting the seat every time. The app did take two attempts to pair the first time, but it has connected normally since then.
The battery has made the electrical system much more usable. With the previous setup, we were always careful about running the heater and refrigerator overnight. Now we can use the camper normally without constantly watching the voltage. Installation required a little cable organization, but the capacity, lighter weight, and stable performance have made it a worthwhile upgrade.
