I mean a coffee machine? It even makes my lights lightly flicker on my Multiplus 48/5000.
3 Likes
Makita makes a nice one that runs from their line of battery packsā¦ 
1 Like
A friend of mine bought 4 x BlueNova 12v cells to run on his 48v APC Double Conversion UPS.
Max 11amp batt before it disconnects, so max 500w. HE knew that going in.
1 Like
yeah in hindsight i should not have just āyankedā those batteries off of the shelf before doing some due diligence 
as mentioned the marketing blurb ādrop in replacementā threw me a bit.
What can i say, i love me a good cup of coffee after a long dayā¦ its a consumer grade machine, measured with clamp meter this morning its pulls 7.5amps ā¦ so 1725wattā¦ just a touch more than the 1500w āspecā advertised. but its not a load that runs for longā¦
first 10seconds is 1725wā¦presumably element (its a bean to cup machine)ā¦ then the grinder uses around 3amps briefly while grinding the beansā¦ the whole ādrawā is over in maybe less than 2minā¦
i have now resorted to putting down a 10kva (8000w) rct online ups i have, with 3 x battery banksā¦
each bank is 16 x 9ah = 192vā¦ This will run coffee machineā¦ heck even the 2000w air fryer for 10min is okā¦ or even a 2min microwave session, but mostly itāll be for a 400-500w draw (tv,media box etc)
dont intend on going to crazy as want this ātempā solution to last.
its a 2amp charger @ 192v so around 400w. manual reckons about 9hrs to 90% recovery but i think this is for the default charger setting of 1 amp. and its based on 1 bank.
so i think @ 2amps/192vā¦ 2 sessions of 6hrs each (12hrs roughly) āshouldā be ok to replenish 50% of this capacity. ā¦
These look promising https://www.livestainable.co.za/product/linergy-12-8v-drop-in-replacement-lifepo4-lithium-battery-8ah-102-4wh/
Looks like that might just get you around 400W out of the inverter before the battery BMS kicks in.
Waiting for somebody in this thread to buy one, open it up, show us the BMS, @plonkster to comment and then somebody whip out their FLIR cam 
Thereās loads of them on Takealot now: 12V Alarm / Gate Lithium Battery Upgrade (12v 7Ah SLA Alternative) | Buy Online in South Africa | takealot.com
2-3 weeks ago I put one of the black & green SecuriProd 7Ah ones in a UPS for a PC that doesnāt handle the Victronās cutover time well, literally less than 1s at a time. PCās one of those small Dell desktops, so not a beast by any means.
Heās dead Jim.
Those inverter UPSās know how to draw current!. Just have a look at all the sale ads for these devices with the message: āNeeds new batteriesā 
Yeah, that wasnāt there when / where I bought them (2x) 
Getting a bog-standard LA tomorrow.
Or go DIY next year, did this for a 24v 700VA APC UPS. Been running for years now ā¦ AFTER I had to double up the BMSs, as one was simply not enough. 
(ā¦ bought too small a BMS, now I know better.)
3.2v 6ah Lifepo4 cells.
Thanks, good to know. I also have a UPS on my Home Assistant PC, and it turns out the LA battery in it is moeg. I was considering a LifePO4 replacement, but Iāll go back to LA.
Ironically the PC actually handled the Victron switchover fine, but the UPS (which I added as a second layer of fallover!) is more sensitive and inverts for a couple of seconds. And since itās battery is dead, it kills the PC - noticed it when my Home Assistant restarted randomly during the day and was able to correlate it to loadshedding 
Herewith an update on this topic posted on the 4x4 Community site: https://www.4x4community.co.za/forum/showthread.php/362356-2nd-hand-Blue-Nova-108Ah-price
Check out from page2ā¦
I agree 100%