I have been reading rumors about Tesla switching their vehicles to a
48VDC system for lights and accessories, etc. If they're doing that, I
can see lead acid losing out, especially with the size, weight, and life
expectancy issues.
bp
On 9/5/2023 11:17 AM, Robert wrote:
Lead acid is still
I appreciate the input, thank you!
From: AF On Behalf Of Forrest Christian (List Account)
Sent: Tuesday, September 05, 2023 7:30 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] AC voltage alarm thresholds
265V is a common top voltage threshold, but you'll need to look at
I'm not sure if the life or risk of fire is significantly different or not
with LiFePo4 vs Li-ion, but they're more suitable for a lead acid
replacement because of the voltage and charging profile, if I understand
correctly.
>From what I've seen, they generally are fine with a lead-acid charging
Do you really need a ups? What's the use case?
I understand LiPoFe is preferable to Li-ion (longer life, less chance of
> fire). Is this correct? *Yes*
>
> Can the BMS compensate for a for lead-acid UPS's charging profile? *No,
> but most lifepo4 16s will be similar to vlra voltages, ideally you
Lead acid is still the go to for combustion vehicles and low
temperatures without grid to heat. That might change but for now they
is still plenty of market. That said, when the vendors for LFP decide
to change the BMSs to do what is needed and the lower temp chemistries
are worked out,
I have had little lithium experience to date but I think the answer to all of
your questions is YES.
The solar guys have been quoting deals like this: 305ah 3.2 Grade B cell ($89)
x 32 = $2,848 for 31kwh, 610ah, 51.2v 16s2p configuration for a 48v system
That is 9 cents per watt hour. Half
I understand LiPoFe is preferable to Li-ion (longer life, less chance of fire).
Is this correct?
Can the BMS compensate for a for lead-acid UPS's charging profile?
Is there a battery with a BMS that can be monitored via a network connection.
Any recommendations for where to buy batteries in
265V is a common top voltage threshold, but you'll need to look at the
equipment specs.
The US grid is specified to produce 120/240V +-5%. So 240 could be up to
254V and still be in spec. (240V+12V)
Equipment is supposed to accept at least +-10%, so up to 264V. (240V+24V).
Personally I'd set
Do any of you smart guys know how far out of whack does AC voltage have to
be to cause trouble?
We have an NMS monitoring rectifier input voltage and it's current alarm
threshold is 250V. Occasionally that goes off and everyone ignores it. I'd
like to set an alarm threshold where we should
