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We have done several charge/discharge cycle tests with the BB10012 batteries at various temperatures. At 10c, they appear to lose at least 5% of rated capacity, when compared to 25C (77F) temperature. At 0c, published charts (not from BB) show a 10-18% reduction for Li, with a steeper drop in...

There's a guy who has a large lead bank in parallel with a smaller lithium bank, full time, on a boat, and swears that it works just fine. I'm looking for the link. He uses a lithium charge profile. The lithium batteries handle the high-current loads and top-charge loads, while the lead...

Any top balancing, once in a while?

For Li, has anyone tried programming in a lower absorption voltage (e.g.: 13.8V), and then used the equalization function to absorb at a higher voltage (e.g.: 14.4V) at pre-programmed intervals (e.g.: once a week)?

SolarTech sells 100w 24V panels https://www.toboaenergy.com/product/solartech-power-spm100p-wp-n-solar-panel-100-watt-24v/?_vsrefdom=adwords&gclid=Cj0KCQjwutaCBhDfARIsAJHWnHvUdhadFZ0aJB2qGQd423J9NJ5Z36urta8vYGObUkVbeKtstgBFHe4aAp_VEALw_wcB Newpowa sells 24V 120W and 200W panels.

Are the Lynx busbars plated copper, aluminum, or something else?

I think that Battleborn considers companies like Relion and Victron to be their competition.

If the battery has a BMS, it would disconnect before destroying the battery. Also, the brakes only pull a few amps - much less than I would have guessed. If a trailer gets loose, there are many other things that could break that would be more concerning.

Why not use aluminum that is as wide as the battery is tall?

For 90dg C insulation, I'm seeing maximum 130A for #2 wire. For 60dg C insulation, it's only 90A. The attached charts may be conservative, but they have served me well, as a guide.

I agree, except for special cases like this: Consider a 2000W inverter. The maximum continuous amps might be 190A, but the recommended fuse might be 250A. The run is short, so voltage drop is not an issue. How do you size the wire? My point is that in limited cases like this where there is...

The most important thing is to size the wiring to the fuse you intend to use. For 2000W, something around a 250A fuse is usually recommend, at which point most charts recommend 4/0, even for a short run.

Relion is maybe the only one to do it right, for an internal heater that is internally controlled. Below 0dgC, all incoming charging current is diverted to an internal heater. When the battery is sufficiently warmed, the charging can begin. No battery power is ever used to run the heaters...

Alternator ratings are only valid at ideal conditions: sufficient RPMs and cool temps. A 65A alternator is too small for a 30A DC-DC. Victron makes an 18A. Speaking only for myself: I would want an alternator with a rating 3x to 4x the input current of the DC-DC. Our stock alternator is rated...

Yes! Use #2 wire and connect directly to the starter battery, and the Orion will be happy. The starter battery acts like a big "spike-snubber", and its voltage will be relatively stable, so it's a good point to connect to IMHO (as opposed to wiring to the alternator). We use use an MRBF fuse...

For most of the discharge cycle, it's impossible to tell your state of charge by voltage alone. A Victron BMV712 is the way to go... https://www.victronenergy.com/battery-monitors/bmv-712-smart Or the budget competitor (less accurate)...

We are using the Cnlinko/Furrion system for a large ground-deployed panel, with a controller in the RV: https://www.amazon.com/gp/product/B01M4RQ3X1/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 plus this...

Here it is. In short: They made a judgement of 25F cutoff based on their anticipation that consumers won't be charging at high C rates.

The weirdest might be the special crimper needed for insulated right angle "flag" push on terminals. There really is no good way to crimp these, without this tool.

Series circuits don't care what order the devices are in.

I you're like me, you have lost count how many crimpers you have. Each has its place, and forte. Using the right crimper for the right job is 2/3rds of the battle.

Interesting that the spec sheet of this battery indicates that it is not to be wired in series OR parallel. That's the first time I've seen a 12V LiFePO4 battery not able to be paralleled with other identical units. Or perhaps were they cautioning about paralleling with other brands?

K8MEJ's solution is perfect. Step-start is SOP for heavy industrial equipment, and anything that uses large transformers, inductors, and/or caps. It's much gentler on EVERYTHING in the system. I'm mulling over the ideal resistor value. The resistor wattage can be exceeded x10 if the...

Doesn't the inverter have an on/off switch? Why not leave it continuously connected to the battery bank, to keep the capacitor charged? My understanding is that the problem is only upon initial connection. The inverters I've seen have the monster capacitor across the DC input. Why...

XC2000. I'm seeing now that other brands of 20000-3000W inverters may have similar idle draws - perhaps a bit less but not much less.

My Xantrex inverter has a low idle power "Load Sense" mode, which sends short 120V pulses to see if there is a load of 12W or more. If it doesn't sense such a load, it goes back into low power/idle mode, saving 1/2 of power. This drives my microwave oven crazy, as it beeps on with each pulse...

Does this battery have a BMS? If so, it's unlikely that you killed it. You're just in low-voltage disconnect and you should be OK if you get it charged back up soon.

With the Lion batteries, I would try to put them side to side, and use heavy copper busbars, avoiding the vibration problem inherent with cables and lugs. I would fasten the bars down with high grade steel 6mm bolts that use all the available threads (not using the included studs), & use a bit...

I'm planning on doing the same thing, mounting it to a roof rack, but making the panel easy to remove to ground-deploy as an alternative. My thought was to tilt the panel very slightly so that wind turbulence won't try to rip it off of the tow vehicle. The charge controller would be in the trailer.

Big ANL fuse should be very close to the 200Ah battery, before anything else. Is 250A the proper size for an 1100W inverter? Output of charge controller should also have a fuse or switchable breaker. I consider the main battery fuse to be the inverter fuse, since it's unlikely that you'll...

The few charts I've seen suggest most of the damage is done at the discharged end, not the top end.

Anyone have sources for cycle-life vs DOD for any of the popular brands of lithium batteries or cells?

I would use 11.5V DC, since inverter will still work that low, and the current will rise accordingly. The rest looks great. For fuse size, multiply the amps by somewhere between x1.1 and x1.5, depending on your taste for equipment protection vs immunity from nuisance trips. For an inverter...

Those are ultra fast acting semiconductor fuses. $60 a pop. Might be better than T-fuse in protecting an inverter from frying. We've used them in AC circuits that experience dirty line power.