I've got a DIY 304AH LiFePO4 battery pack connected to an old Goal Zero Yeti 1250 solar generator. It works great for power backup, but the input capacity of the Yeti is too low (260W max) and takes too long to recharge the combined battery pack (internal AGM + external LiFePO4). I got this charger to improve that situation and also to replace the two smaller external chargers I've been using which only charge at 10A each. At 30A, this charger does a good job and charges at about an 0.1C rate for this pack. When I first connected it, the LED indicated that it was running the max charge rate, even though the battery pack was at nearly full charge. I was concerned that it had picked the wrong charge profile for LiFePO4 vs other Li-ion (which charges to 4.1V rather than 3.6V) and might damage the batteries by charging above the 3.65V per cell limit. The BMS protected the pack though, as it cuts off input above 14V and cell charging above 3.6V. It charged to the correct voltage range and the pack sits at 13.56V (3.39V per cell) after resting overnight.The charger has a pretty aggressive charging profile, though. I just reconnected the charger and it's bouncing at the voltage ceiling set by the BMS. The LEDs indicated that it went from charge to absorption mode, and now it's green againand the cell voltages are relaxing back to about 3.4V.The fan came on when I first connected the charger, and it's a little loud. I'm using this inside the house (LiFePO4 is pretty safe for that), and it was almost loud enough to be annoying within about 10 ft.Interestingly, I went to the mfr website to look for the online manual and noticed that the price through the mfr is significantly higher than here. So if you want this charger, this seems like the best place to buy it.

I have a 12v low voltage system designed in my house that powers some lights, the internet and security systems and can create 120v AC in an emergency. It is powered by a 200ah Lifepo4 battery. The charger I installed years ago died recently and I needed a new one. The old one did not have a fan and was too hot to touch when working.I was super impressed with this FORM battery charger when I received it. It is built very well and I tested it fully to give this review. Physically, the aluminum case is very durable. I opened the case to look at the electronics inside and found the entire innards is potted which is a process where polyurethane or an epoxy type substance encloses the electronics to protect from vibration, waterproof the electronics and dissipate heat. That is what FORM is calling the WeatherShield Internal Coating. Additionally the cover I opened had an O-ring sealing this case from water intrusion. I am sure it easily passed the IP67 rating which means the product is "dust-tight" and can withstand temporary submersion in water.The cords are permanently attached to the charger. The heavy duty 120v grounded cord is over eight feet long and battery cord is over five feet long and has ring terminals made on the ends with insulating boots to cover the battery bolts. These were perfect for connecting the terminals on my 200ah battery. I was intrigued by a short third-wire coming out of the the metal case which is shrink wrapped to the battery line. It connects to a temperature monitoring circuit to be sure the wire does not get too hot from charging the battery. Additionally it has a temperature monitor in the base of the charger as well.As my last charger would get so hot, I actually tested this FORM charger with a simple kitchen thermometer placed on the two warmest sides and covered with a cloth to give an accurate reading. With ambient temperatures ~78°f, the case of the charger never went above 98°f. The fan runs constantly while the unit is charging, even during low output times, such as the absorption stage. There are several modes to this charger. My charging cycle started out with 30 amps, but began to taper when my battery reached 13.7 volts. At 14.3 volts the charger began absorption mode until it topped up the battery.While deep charging, the FORM charger was pulling 508 watts from my 120v outlet and putting in 438 watts into my battery. This is an efficiency of 86% which is good. I saw the smarts of this charger another way; before installing, I connected the output leads of the charger to a voltage meter and plugged in the charger. After a few seconds, it began to output 14.5 volts. After 50 seconds it bumped the voltage up to 15.5 for a few seconds then shutoff. The FORM charger was trying to wake up a dead BMS, before deciding no valid battery was connected.This charger is designed to be permanently mounted inside the storage compartment of a golf cart or UTV where the cord could store when not charging. However it has lots of other uses with a large capacity 12v Lifepo4 battery. My FORM charger is wall mounted inside my home. I do see lots of similar looking chargers out there, but this is the first I have seen with temperature protection on the cord. Overall I am very pleased with this charger. It has done very well charging my battery.

This unit is heavy (6lbs) and well-built and can be mounted inside or outsideIt is designed for Lithium and LiFePO₄ (Lithium Iron Phosphate)I use this to maintain my boat batteries (small personal watercraft and trolling motors) which use lithium deep cycle batteries. Note A deep cycle battery is designed to provide a steady amount of power over an extended period and to be discharged deeply (up to 80%) before needing to be recharged.I converted the ring clamps to a standard power adapter in which I could use a ¼” plug, a two-pronged plug, or clamps.This works really well and actually has more capacity that I needNote #1: Electric golf carts are 36V, 48V, or 72V so a 12V systems is not usefulNote #2: Most off-road side-by-sides are 48V, 72V or higher in newer models so a 12V system is not useful. And, if mounting to a side-by-side, I wouldn’t want to carry the extra weight off-road unless it was a multiday tripHowever, I found this charger to be very useful for maintaining 12V systems for vehicles (tractor, gas-powered golf cart, motorcycle, etc.).At this price, voltage options 36V/48V/72V would be a plusAll things considered, four stars for meCHARGING NOTE:I would NOT recommend ever using a traditional Lead-Acid battery charger on a Lithium/LiFePO4 batter as it can damaged your expensive battery. A “Smart” charger provides for• Correct Charging Profile: Lithium batteries need a constant current/constant voltage (CC/CV) charge cycle.• Overcharge Protection: Prevents battery damage by stopping charging at the correct voltage.• Efficiency: Faster and more efficient charging compared to lead-acid chargers.• Safety: Built-in protections against overcharging, overheating, and short-circuiting.MULTIPLE BATTERY CHARGING:The is a 30Amp Charger made for larger batteries or banks of batteries, which is a lot of charging power. And while probably NOT recommended by the manufacturer, you can charge multiple batteries simultaneously with a few cautions.1) Match Battery Specifications• Voltage: All batteries must be the same voltage (e.g., all 12V).• Capacity (Ah): It's best if the batteries have similar capacities to avoid imbalances.• Type: All batteries should be of the same chemistry (e.g., LiFePO₄).2) Use a Battery monitor for each battery to monitor charge levels