Dumfume

I bought the 300Ah Dumfume for 400$ Cdn in january 2026, unbelievable price! It replaced a 100Ah PowerQueen. No issues so far. I have a diesel heater, a 1200w inverter and numerous 12v lights wired to it. The only negative issue is that according to many users a 300Ah 12v bank does not really exist so this battery is either a 280Ah ou 314Ah. I haven't done a capacity test so I don't know what the real amperage of the battery is.

imasphere · Oct 23, 2026

I’ve had this battery for about 1.5 years now and I haven’t had any issues with it. It’s installed in my 5th wheel trailer and is connected to 400 watts of solar. I occasionally charge it from my generator using a 40amp charger, along with the RV’s built in charger. I also charge it with a 40 amp DC TO DC charger off my truck while driving.

jege41 · Oct 21, 2026

I'm using it as an aux battery in my overland jeep powering a 1000 watt stereo and all accessories (light bars, cooling fans, E-coolers, ect) and it's been holding up great for nearly a dozen trips so far. It sees average loads of 20-30 amps and bursts of 100+ amps when the stereo is on party mode. I charge it with 30 - 50 amps using a Victron Orion XS whenever the jeep is running. Lots of vibration and bumps.

djamps · Oct 18, 2026

I've had it for 18 months now, I used it to build a poor-man's portable battery bank. It's pretty heavy, but can last all day with pretty heavy use. Connected to a 3500W Vevor inverter.

bpwetzel82 · Oct 16, 2026

After watching Mr. Will Prowse's video about the Dumfume brand, I decided to go ahead and buy it at the best available price—$352 CAD (TEMU december 2025) I am completely satisfied with the performance of the Dunfume 300 Ah battery. I initially used the battery to charge my Bluetti AC200P to verify it was working correctly, and everything was perfect! A few weeks later, I upgraded the inverter-charger to the VEVOR GS-800RVP-55 and replaced the White-Rodgers 120-105452-6 with a Precision Circuits LI-BIM 225 (Lithium Battery Isolation Manager) in my Class C motorhome. Since then, I have driven thousands of kilometers with my Dunfume 300 Ah battery and used my electrical system extensively without any issues.

nomadeenvr · Oct 14, 2026

I have 6 of these batteries, and they have all worked exactly as expected. The first 4 are in series to create a 48V 300Ah battery bank, and has a LiTime balancer to keep them at the same voltage. The last 2 are in series to create a 24V 300Ah battery bank, and use a Victron SmartShunt to monitor mid-voltage, and since the batteries are not exactly identical I do see some minor voltage difference from time to time, but not enough to be worried about.

eivind · Oct 13, 2026