Search results

It definitely does support a single cell: Air8 support 1~8S Life, Lilon, Lipo, ULiHv batteries, even includes the ULiHv battery with 4.45V/cell. and it also support 1~12S Pb battery and 1~16S NiMH/Cd battery.

I run 24V DC server fans in conjunction with DC water pumps for a solar swamp cooler. Also have a server fan to help RV propane fridge coil circulation. (surprising how much this helps!)

The experts have chimed in on similar scenario (still a guess that this is your issue): https://diysolarforum.com/threads/neutral-ground-bond-totally-off-grid-w-generator-and-reliable-inverter.65956/

1000Ah x .7 / 4A = 175h (7.29 days) When did you start?

Agreed but a little 8Ah cell (8Ah x 3.2V = 25.6Wh) may not last long with a BMS, especially with bluetooth or other connectivity. Thats about 3 months x 30 days/m x 24h/d = 2160h 25.6Wh x 4 cells = 102.4Wh 102.4Wh / 2160h = .05W If the BMS uses more than .05W that is enough to fully drain...

First off, I'm not qualified to give a definitive answer. My guess is that someone who knows will chime in with a solution that may involve removing the neutral bond on your generator when its connected to your (already bonded) inverter. And your generator be rebonded later for stand alone use.

Yes. I have a couple ISDT chargers so i think your Air8 can charge a single cell. Charge the one cell to about 3V and the Air8 should recognize it with the balance wires. You do not need to disassemble the battery to charge one cell. I suspect your BMS drained your battery.

I think he's asking whether your generator's neutral is bonded (connected) to the ground (green wire connected to a white wire or bus with white wires on it). This would probably be done in the generator output panel. Your XW6048 almost certainly has this neutral bond. It may be a qualifying...

Do you have access to the cell voltages? I'd bet one cell drops below the low voltage cutoff and the BMS cuts out. This does not explain how charging makes it jump to 100%. But why are you hitting it with 16V?

Click on the link in my signature, there are more goodies in there. They were not created by me.

Definitely! Consider it just like any other 8x 240Ah cells combined to make an 25.6V battery.

4000W / 375V = 10.66A This says 10Awg copper (standard solar wire) is plenty...

How many volts, amps and what distance is the wire run?

You've heard of "FU money". This is FU power:

More munging to see what raising voltage more does... Make 3 2P pairs. 20V 10A Put these in series with both 200W panels: 100V 10A = 1000W 1000W <--- this is great... assuming i got the math right.

Lets munge with array numbers. Make 2 3P pairs with 100W panels. 20V 15A Put a 3P pair in series with 200W. 40V 11A Put 2 of these in series. 80V 11A = 880W Your delta pro: 80V x 15A max = 1200W (using all 880W available) <--- far better Looks like getting the voltage up...

Your 8P setup was 20V: 20V x 15A = 300W <---- there is your number! The array config i recommended is 40V so that would be limited to 600W (in theory).

The amps are pulled by the Delta Pro so it should only pull what it needs (15A max). Besides, you've had this connected 8P with 52A and have not released the magic smoke.

Alcohol isn't the answer. Alcohol is the question. The answer is "yes!"

Making hydrogen is not that far off.

Make 3 2S pairs with the 100W panels. 40.4V 5A Put 200W in series. 38.2V 11A Combine all pairs in parallel makes 38.2V x (5A +5A +5A + 11A) = 993W The 4 pairs will need to be fused before combining 4:1.

This clips all panels to 5A so you lose more than half of your 11A 200W panel. Give me a moment to try a few scenarios.

So all 8 panels are in parallel. Whatever the voltage (Vmp) of the lowest panels will clip all the other panels to that voltage. Sum the amps (Imp) of all panels and thats your array amps. If you post the specs (watts, amp, imp) the best config can be figured out. What is the max input...

Exactly! Obsessive–compulsive personality disorder is a cluster C personality disorder marked by a spectrum of obsessions with rules, lists, schedules, and order, among other things.

The cutoff is when the source is too low. I guessed 10V. 420W /10V /.88 = 47.7A on the input side.

If it charges 24V at 15A... 28V charging x 15A = 420W The draw on the input, and adding 15% conversation loss (use real number if you have it): 420W / 10V cutoff / .85 efficiency = 49.4A

I'm having a problem picturing this, but if you have 8 cells connected in series (4S in series with 4S), when you connect the individual cells in parallel, that will be a dead short (and there will be sparks, fear and then sadness). Hopefully a video too.

The thread and YT video both showed what looked like a single cell having some issue. Its not clear to me or any of the commenters whether it was shorted against a frame or internal short because it was mounted on end. I am also not sure if either of these scenarios would have benefitted...

Do you have the motor or panels or battery or anything yet?

Are you planning on running the motor directly from the panel(s)? If so, match the array output voltage to the motor operating voltage and when enough watts are produced to overcome the motor/pump surge requirements, the motor will run. Does your heater have a water pressure switch so that it...

In my experience, the BMSs cell level over volt and cell level under volt conditions would enact a disconnect long before cell temperature became an issue. Are there scenarios where a cell is within safe operating voltage (2.50V-3.65V) starts "fuming or catching fire"? I will add the...

Is this a scenario that you have seen or heard about?

If you have a sub panel in your ADU you could use regular micro inverters that simply connect to pair of 15A breakers in your sub. This is assuming you have split phase to your ADU.