Inverter and battery sizing to power my camper microwave

[LaneW]

So, I am getting all sorts of misinformation on this and hope someone can give me correct scoop.

I am planning to replace my LA battery in my truck camper with two, 100 ah Lithium batts (probably SOK). I also need to install an inverter, really just to run my microwave. It’s a 900 watt MW that draws 1350 w according to the manual. Looking at a couple of 2000 watt pure sine inverters. But I am getting conflicting info, even from the manufacturers, as to whether two 100ah lithiums and a 2000 w inverter will be adequate to run the microwave .

Does anyone have definitive information on this question, or can you point me to a truly reliable source for answers?

Thanks in advance!

[jaycocreek]

3 tons wrote:
I don’t have BB myself, but the bargain-bin batteries dare not match their 10 year warranty (who can tell what grade or composition their cells are??), or tech service, and cylindrical cells stay cooler (due to assembly air gaps), thus no outward swelling of battery case…Quite naturally this all comes at a premium, but it’s nice to have the option - Just saying

3 tons

There are people that tear these bargain bin batteries down,identifying the cell manufacturer/wires etc and bms..On YouTube,so you pretty much know what your buying and what's inside..

Example-Redodo(Zooms) Ganfeng cells/LiTime (Ampere time). Eve cells

[3_tons]

Well, I’d note that there’s lots of connections in my smart-phone (2 billion transistors) and PSW inverter-charger, but when done properly, 2 inverters, 3 phones and 2 i-pads later, I’ve yet to have a single problem…Subject to change?? (I donno…)..Honestly, over the past many years I’ve yet to lose a moments sleep over these perceived boogieman - that some folks do, I can accept that…

3 tons

[StirCrazy]

otrfun wrote:

StirCrazy wrote:
. . . I would argue there is more potential for something to go wring in a battle born with over 100 cells soldered in as aposed to a prismatic type with only 8 battery conections, but it will be easier to detect on the prismatic . . .

I would argue there is less potential.

The 100ah Battleborn (BB) battery cost more for a very good reason---better redundancy. BB uses 100+ cylindrical cells spot-welded in a parallel/series configuration (vs. series connected prismatic cells). Configured this way, a few cells can loose capacity or become unbalanced and have very little effect on the battery's overall output.

99% of the 100ah lifepo4 batteries on Amazon, etc., use prismatic cells. Typically 4 in series. If *any* of these 4 cells loose capacity or become unbalanced it directly and immediately degrades the overall output of the battery---potentially to the point the battery becomes almost unusable, all because of one cell.

BB could have easily chosen to use less expensive prismatic cells, but they didn't in order to provide a more stable, robust battery.

your talking about the noticable effect not the potential, and I did say that I believe. in a battle born if a solder joint comes lose it or a cell goes bad depending where it is you might not realy notice it or you may notice it a fair bit depending on the failur. in a prismatic if one goes bad you know it, which I concider a good thing and ease of changing out a cell in a prismatic system is by far more easy. I would argue also that prismatic may or may not be less expensive. the actual physical cell the celindrical cell is much cheper to produce on automated lines so to buy the cells them self the 120 cells in a 100AH battle born are cheeper than four 100AH prismatic cells untill recently.... the manufactuing process for prismatic has been altered and ramped up which is bring the cost down on prismatic quite significantly. you have less conections inside a prismatic battery so less chance for a factory defect, which also translates for lower labour costs. because you have 12 to 20 conections over 10 posts in a prismatic compared to the 240+ in a celinderical set up so the labour to wire/conect the cells is much less. the new production savings and increase in amounts of prismatic cells is making them more populer in automotive aplication which is bringing the price of automotive battery down. tesla is now doing all there chinese cars with LFP prismatic cells.

Steve

[Grit_dog]

2oldman wrote:

Grit dog wrote:
No, they’re still overpriced thanks to a following due to being the first legit LFP guys.

The makers of cheaper, inferior products rely on this.

Value is both objective and subjective and of course different to different folks. And to say there is not some very subjective opinion of the “value” in this case would be wholly incorrect.

[2oldman]

Grit dog wrote:
No, they’re still overpriced thanks to a following due to being the first legit LFP guys.

The makers of cheaper, inferior products rely on this.

[3_tons]

I don’t have BB myself, but the bargain-bin batteries dare not match their 10 year warranty (who can tell what grade or composition their cells are??), or tech service, and cylindrical cells stay cooler (due to assembly air gaps), thus no outward swelling of battery case…Quite naturally this all comes at a premium, but it’s nice to have the option - Just saying

3 tons

[otrfun]

StirCrazy wrote:
. . . I would argue there is more potential for something to go wring in a battle born with over 100 cells soldered in as aposed to a prismatic type with only 8 battery conections, but it will be easier to detect on the prismatic . . .

I would argue there is less potential.

The 100ah Battleborn (BB) battery cost more for a very good reason---better redundancy. BB uses 100+ cylindrical cells spot-welded in a parallel/series configuration (vs. series connected prismatic cells). Configured this way, a few cells can loose capacity or become unbalanced and have very little effect on the battery's overall output.

99% of the 100ah lifepo4 batteries on Amazon, etc., use prismatic cells. Typically 4 in series. If *any* of these 4 cells loose capacity or become unbalanced it directly and immediately degrades the overall output of the battery---potentially to the point the battery becomes almost unusable, all because of one cell.

BB could have easily chosen to use less expensive prismatic cells, but they didn't in order to provide a more stable, robust battery.

[Grit_dog]

No, they’re still overpriced thanks to a following due to being the first legit LFP guys.
But hats off to them. I never turn down selling something for 2x what it’s worth if someone will pay me for it. And continue to do so until I can’t.

[2oldman]

StirCrazy wrote:
battleborn is way over priced for what it is.

There's always a different opinion. I don't subscribe to the 'overpriced' argument.

[StirCrazy]

2oldman wrote:

LaneW wrote:
.. positive stuff about Battle Born…… agreed or not?

I always buy the best I can afford, and if you plan on RVing for many more years, I would buy the BBs.

It's not that cheaper products won't work, it's for how *long* they will work. My life experience is 'you get what you pay for.'.. every time.

battleborn is way over priced for what it is. the componants are being used by other as 1/2 the price and with a different formfactor (ie prismatic instead of round battery cells, even less while the technology and quality remains the same. I would argue there is more potential for something to go wring in a battle born with over 100 cells soldered in as aposed to a prismatic type with only 8 battery conections, but it will be easier to detect on the prismatic. when battle born came out they were almost the only player so they could set there pricing where they wanted.. now they have failed to drop there pricing to reflect current componant pricing so other have filled that space with quality products. what did battle born do, they launched dragonfly there OEM division for rv shops and such so they can charge 3800 cdn plus taxes for a 270AH battery. no thanks concidering I built my first 280AH battery for under 700 bucks. saving 3000 is worth learning how to do it to me haha

here is a good video from will about the 3 cheepest good quality batteries and he even mentions ones not to buy.

video

[2oldman]

LaneW wrote:
.. positive stuff about Battle Born…… agreed or not?

I always buy the best I can afford, and if you plan on RVing for many more years, I would buy the BBs.

It's not that cheaper products won't work, it's for how *long* they will work. My life experience is 'you get what you pay for.'.. every time.

[LaneW]

2oldman wrote:

LaneW wrote:
Buy 2, 100 ah SOK batteries....I am not looking for the cheapest, I am looking for the safest, most reliable approach.

Is there some reason you chose the SOK rather than say, Battleborn?

I have seeing some really positive stuff about Battle Born…… agreed or not?

[2oldman]

pianotuna wrote:
Price would be much cheaper for SOK

Yes, which is why I quoted what he said about cheap.

[pianotuna]

2oldman,

Price would be much cheaper for SOK

[2oldman]

LaneW wrote:
Buy 2, 100 ah SOK batteries....I am not looking for the cheapest, I am looking for the safest, most reliable approach.

Is there some reason you chose the SOK rather than say, Battleborn?