Battery Station for Pellet Stove

So being a short test not a great look because of the resolution. But this shows 0.01kwh per 12 min or 0.05kwh per hour. Times 8 hours it would be 0.40kwh or 400 watts

 

The total watts capacity of the ups unless I am mistaken is 12v x 9ah=108. Times two equals 216. In a perfect world without any efficiency loss and running the batter to zero we should get about 2.5 hours of runtime...but due to the other factors they estimate 90. I think it is actually more than that in practice. But not much.

 

That makes sense IHP - when you are monitoring in "Watt" mode, it is not showing "Killowatts per hour", but showing you a "snapshot" in time of current wattage, being used by the device.

.110 kwh (12 min) x 6 = .660 kwh for 72 minutes of runtime. Let's use .610 kwh, or 610 watts per hour, which is what you obtained as the average kwh reading on the meter.

Average pellet stove uses between 500-700 watts of energy, per hour when it's running / chugging along.

Per your readings:

70 watts energy for auger motor, x 60 minutes = 480 watts energy, per hour.
Exhaust fan motor + Room Distribution fan motor on a fully warmed-up / running stove: typically 20 to 30 watts, x 60 minutes = 120 to 180 watts energy, per hour.
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Total wattage consumed per hour: 600 to 660 watts, or .60 - .660 kwh.

610 watts per hour x 8 hours desired runtime = 4,880 watts of energy needed, to run the stove for that time frame.


* The KillaWatt meter "averages" the total wattage reading, over time, to a "kwh" measurement: it's a nice feature that allows more accurate measurement, over time.

* That reported # is still in "watts consumed per hour" though.

I hope this helps,

Best Regards, Rob

 

All fair points. I don't envision using this set up in a worst case scenario. That would need me to run both stoves and I would run the genny for that.
I would be looking at a Lifepo4 unit for quick recharge and safety.

 

We are off the rails here lol. My stove doesn't use 600 watts per hour even with the igniter stuck on. It runs at 80 per hour average. 350 on startup

 

The setup I have in my sig will run our P43 for a good 10-12 hrs. If you used Li Ion batteries instead you'd increase the run time even more.
It's not inexpensive, when I bought the inverter, 2 batteries and cables back in fall of 2019 the cost was about $850. It's now about $1000 for the same items.

sam

 

The cut off should be fine as I would still run the UPS in between.

 

Yes, kill a watt at the outlet. UPS into kill a watt. Stove into UPS. Shows 70watts and then 90 watts when the auger turns. For a total of 0.610 kwh after 8 hours.

 

J, that battery set up you mentioned would be 10 times the size of my current UPS. So 900 minutes (not counting any losses) or 15 hours

 

I may just for fun buy a cheap 300 watt one and see if I get about 4 hours.

 

Something like this maybe.

 

Yeah, someone with more knowledge than me could probably do that.
We haven't had an outage here of more than 4 hours in the 12 years I have lived here. So I don't need to get too crazy or expensive with it. Altough the smaller outages have increased in frequency.

 

Not all Lithium is of the same chemistry, the lithiums that like to catch fire when charging are usually the li-po (lithium polymer batteries)
li-ion (lithium ion)is fairly safe to charge unless the batteries get damaged- what battery isn't when damaged?
lifepo4 (lithium iron phosphate) is generally even safer for recharge. but I have seen at least 2 incident's (on rv forum) where they went up in flames.
Those were custom built packs and grade b cells.
I myself wouldn't fret much about it. Everyone one of us recharges a lithium battery when we plug our phone in.
As far as UPS charging the lithium about the worst that would happen is the UPS never fully charges the battery due to different chemistry and voltage requirements.
basically the ups charger will go into a float/maintain charge before the battery is fully charged. due to the voltage it sees on the battery.
I'm oversimplifying this obviously and not trying to get into the down and dirty, I personally feel it's better for you to go search these answers out if you want more detail so you can educate yourself instead of listening to a random online. because SAFETY
Anyway not a huge deal to not charge it to 100% because a lot of people who are off the grid using lithiums don't charge to 100% anyway to try and get the most life out of the batteries. It's even recommended to not fully charge a lithium if you are going to store it long time, charge to 80% and store it.