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I dumped our LA engine starter batteries 10 years ago replacing them with a 4 cell 300Ah LiFePO4 battery that has started the Canter 3.9l turbo diesel engine perhaps a few thousand times with ease. It also powers the motorhome attached. Lead will never enter our equation again. I have no doubt...

I will let you know when we get there. Our 4 cell 300Ah Sinopoly battery has now survived 10 years of fulltime travel being typically depleted about 35% each evening. It also starts the truck engine often multiple times a day. Number of "cycles"? I will leave that to some theorist. Talking...

I will stick with 12V for a while yet thanks. Our 10 year old 4 cell LiFePO4 battery both powers our MH and starts the 3.9l turbo diesel engine often several times a day. A 48V - 12V 730A peak current converter could be tricky. The 255l 230V fridge, TV, coffee maker, toaster, jug, Instant Pot...

I can only give numbers for our 4 cell 300Ah Sinopoly LiFePO4 battery that has survived 10 years of full time travel. Two paralleled shunt based battery monitors, Victron SmartShunt and $50 Junctek agree with each other. They are either relatively accurate or less likely both inaccurate by...

Pretty much the same. 4 cell 300Ah Sinopoly LiFePO4 battery. 50A Solar controller, 80A alternator and 30A mains charger all limited to 14.10V maximum. According to my two shunt based battery monitors the pack is always at 100% SOC once the terminals reach 14.1V regardless of charge current...

To add to my previous post re our 10 year old 4 cell 300Ah Sinopoly battery. No charge source exceeds 14.1V at which point the battery is always at 100% SOC regardless of charging current. Absorption time has proved unnecessary but continues while driving. Increasing the battery terminal voltage...

Cycle counts for partial daily draws? I have serious doubts about accurate counting via any method. Our battery is now approaching 3800 days of supplying somewhere in the region of 115Ah or 1.5 KWh overnight while the sun does not shine. Someone else is welcome to perform any cycle maths. Our...

Near enough for me. Click to enlarge

An old thread but no contest for us. I will simply requote a post of mine a few days ago in another thread: I understand that a few here detest Samsung but 10 years ago I replaced our 175l 3-way with a 230V Domestic 255l (9 cu ft) Samsung Digital Inverter fridge/freezer. It is powered by a...

No Winston's but our very similar 4 cell 300Ah Sinopoly LiFePO4 battery pack has now survived 10 years of full time travel both powering the motorhome and starting the 3.9l turbo diesel engine often multiple times a day. I perform an annual C/10 capacity test each November. Converted to Ah the...

For the last 10 years of full-time travelling the solar energy fed to our LiFePO4 battery has managed to run everything in the motorhome from jug to induction cooker to fridge to toaster to Instant Pot to occasional water cylinder heating, started the 3.9l TD diesel engine a few thousand times...

I understand that a few here detest Samsung but 10 years ago I replaced our 175l 3-way with a 230V Domestic 255l (9 cu ft) Samsung Digital Inverter fridge/freezer. It is powered by a dedicated US$60 300W 230AC PSW inverter mounted behind the fridge. Both the fridge and inverter running 24/7 have...

I have a $60 400A Juntek and 500A Victron SmartShunt with dedicated old android phone monitoring our battery setup. While being a long time a Victron user I must admit that the Junctek is my GOTO unit for day to day use. Either both are inaccurate or I can rely on the numbers. They always agree...

As mentioned earlier I occasionally measure cell voltages to ensure runaway is not occurring. No OCDc. I live with the cells very close and keep an eye on things. The battery monitors help. The 9 year old 4 cell 300Ah Sinopoly LiFePO4 battery shows no physical signs of bulging and still looks...

Typical and repeatable captured battery monitor peak starter motor current draw. I have no method of recording the average. At c12.2V engine starting usually takes less than a second.

I would have used the existing Victron SmartShunt anyway. The Junctek was cheap and accurate and I refer to it every day. Find me an affordable and reliable (guaranteed not to fail in 9 years) internal BMS that can survive this 2 or 3 times a day and I could be interested. My homebuilt...

I have seen a few internal BMS controlled battery failures in way less than the 9 years our setup has survived.;)

No charging source exceeds 14.1V at which point the battery is always at 100% SOC regardless of charge current according to both the Victron SmartShunt and Junctek battery monitors. Alternator c75A, solar up to 50A and rarely used battery charger 30A. Noisy alarm at 14.4V, 20% SOC and Victron...

""better" at starting""? The equation will be different if your batteries are regularly subject to freezing temperatures. We dumped our 2 huge paralled LA start batteries 9 years ago. Our 4 cell 300Ah LiFePO4 battery has now survived more than 9 years of full-time travelling in our motorhome...

My previous post: https://diysolarforum.com/threads/many-here-say-that-an-alternator-should-not-be-connected-to-lifepo4-and-that-one-should-use-dc-dc-charger.53318/page-4#post-714171 It has now all survived 9 years of full-time travels and still faultless. No DC-DC charger involved.

The Junctek battery monitor is easily A & V calibrated via their app in 1% steps. After slight tweaking both my Junctek and Victron SmartShunt agree within 0.01V, 0.02A and 1 or occasionally 2% SOC across the entire usual battery levels.

Unfortunately no WiFi involved but I have followed a few clever users of the previous KGxxx models who have persevered with output protocol details and achieved some amazing results. e.g. https://diysolarforum.com/threads/rs-485-porn-on-junteks-monitors.45797...

2. The Bluetooth module is located in the main module mounted near the shunt unit. It all still performs fine without the display via the app. 3. Untested but I had no success with the previous Juntek wireless model. We use an old phone permanently mounted up front in our motorhome to display...

Deleted. Questions not directed at me.

I'm still waiting for someone to inform me what cell balancing actually achieves for a typical small setup user. Have cell manufacturing methods deteriorated so much over the years that it is now mandatory? For our battery the few seconds at 10A required for perfect cell balance numbers cannot...

Fortunatrly we don't all experience serious freezing conditions. Here in NZ the coldest night ever was -10°C (14°F) but the battery case temperature was still 6°C in the morning and by travel time the battery accepted the full 80A alternator charge as usual. Our 4 cell 300Ah Sinopoly LiFePO4...

I may have to wait a while. Our 4 cell 300Ah Sinopoly LiFePO4 battery has survived 9 years of fulltime travel in the motorhome with a capacity loss in Ah from the initial 315 to just 299 at the last annual C/10 capacity test last month. I suspect that mysterious death from "old age" will likely...

The display is not really configurable but it displays all the information I require for day-to-day use. It also stores data but the Victron SmartShunt wins for historic data retrieval. Total Ah ever used? No. Ah used? Both the head unit and app display show Ah remaining. My battery capacity is...

I have both the Junctek and a 500A Victron SmartShunt installed in series. A dedicated wall mounted android phone displays Victron and Junctek data. Both always agree within 1% V&A and 1-2% SOC. Most of my gear is Victron but I must admit to preferring the Junctek display for everyday use.

A likely false positive from Clam or MaxSecure checking an Android .apk file does not make me sweat.

KH-F.apk current version is 1.4.0 and has the same hash as originally downloaded a few months ago. Clean according to a virustotal.com scan. Trouble free so far. I can find 1.3.4, 1.3.5 and several older if you really want them. I also have several versions for the earlier KG-F monitors. The...

Despite all the theories, papers and forum posts read over many years our battery has never required balancing since the original careful top balance. In the meantime we will continue to use our 9 year old 300Ah 4 cell Sinopoly LiFePO4 battery to both power the house and start our motorhome...

I'm not certain that matching was a thing 9 years ago. Purchased strapped together with two hose clip style stainless steel bands. Still zero visual case swelling. From memory the cell barcode numbers are not sequential. I will check tomorrow.