I had the same experience as Jay as far as being marketed three idea that
managed lithium batteries can jane several year age differences and still
play well together, only to be told, after telling my clients the same,
that most manufacturers don't recommend more than a year age differential
If the batteries have a 10-year life, I don't think it would make much
difference. LA batteries show an increase in internal resistance after a
few recharges. Typically, the BMS in a Li battery will ensure at top
balance all cells balance, If the batteries are being properly recharged.
On Tue,
Jay
Do not get me started. That is not what they told me when I was buying 1 to 2
per customer. Thay were very optimistic about growing a bank. Now they are
saying something very different. Also their BMS boards, they do not hold up and
now I have customers that have had numerous
Hi William,
I'll rattle off a few notes based on some of my experiences:
If I were to replace an old Sunny Boy transformer inverter with a modern
transformerless inverter, what are the implications?
*[August Goers] I'll forward you and the group an old SolarPro Magazine
article called "Updates
Friends:
I researched this and got no clear answer:
If I were to replace an old Sunny Boy transformer inverter with a modern
transformerless inverter, what are the implications?
I know I need PV rated or conduited feeders.
Is PID an issue?
Should I disable arc fault as a legacy entitlement or
I’ve done this many times
I use an Iota or power max charger to run the DC.
Jay
> On Apr 23, 2024, at 2:42 PM, Jason Szumlanski via RE-wrenches
> wrote:
>
>
> I have an off-grid client who is working on replacing old equipment at a
> cabin. He has a lot of 12 volt distribution in the
Even with LFP, mixing different-age batteries is still not the best idea.
Even if using closed-loop communication, they can get out of balance pretty
quickly, which will lead to all kinds of BMS issues.
One of the reasons I suggest using a main positive and negative bus with
breakers: You can
Not being helpful but I walk away from these. It will come back to
you.
Dave Angelini Offgrid Solar
"we go where powerlines don't"
[1]https://offgridsolar1.com/ [2] [1]
e-mail offgridso...@sti.net
text 209 813 0060
On 2024-04-23 2:40 pm, Jason Szumlanski via RE-wrenches wrote:
I have
I have an off-grid client who is working on replacing old equipment at a
cabin. He has a lot of 12 volt distribution in the house for lighting,
fans, and a 12 volt refrigerator. He also has 120 volt AC loads that run
through a separate distribution panel where the only source is a 2000 Watt
Honda
In a battery backup mostly float state with low cycle count, I’d add to a bank
several years later.
It’s really hard to say “several” since most LiFePO4 batteries haven’t been
alive for that long.
I’ve personally added 8 Pytes E-Box to 8 eFlex with no issue. The Schneider
Insight even
Yes, Grid Zero would work, but the customer wouldn't be selling power to
the utility. You could program the Radan to sell more power by lowering
the sell voltage. I would get aggressive with it for at least 20-30 cycles
to see if you can recover some capacity. Ideally, to recover lost capacity
It depends on how the BMS shares with the new BMS. A state of life
measurement, the charge algorithm, and ? has to account for this for
them to charge and discharge well together.
Pretty safe to say one year for many makes of battery. Kind of like
bussbar use in large systems, is a way to
HI All
Speaking of batteries I wonder what you all make of this.
I was reading the Fortress battery manual and it says they don’t recommend
adding new lithium batteries to older lithium batteries if the age is over 1
year difference.
Thoughts?
thanks
jay
You can do it in one of several easy ways.HPX mode on the Mate. High Battery transfer. When the battery voltage and/or SOC is above the setpoint drop the grid. When the battery voltage or state of charge goes below the setpoint pick up the grid. This case the Mate is doing the driving. Also
Hi All,
I have an AC coupled Radian that is used to back up certain loads when the
grid is down. It is paired with the Northstar Blue (Outback) batteries. The
system sits in float nearly all the time. During a recent grid outage, the
batteries had less than half the capacity that I would have
Same experience for me, Toast if reboot doesn't wake it up.
On Tue, Apr 23, 2024 at 3:33 PM Howie Michaelson via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:
> I've had several MX and FM failures (at least 5) over the years, often
> with the output at zero. I don't know what actually
I've had several MX and FM failures (at least 5) over the years, often with
the output at zero. I don't know what actually fails, but they just stop
producing. I must admit, I don't remember if in all cases I tried
resetting them to factory default, but my memory is when talking to Outback
Isn't that too much array power for an MX60? Just based on the numbers
you gave, it looks like over 3kw, which is 63 amps at 48vdc. He didn't
mention the actual PV module ratings, but I suspect its just way too
much array power. It might work for awhile, but its going to start
cooking
My old MX60 said " hot" when the fan had failed.Todd
"MX 2 Hot (Very rare) Either the MX60 is too hot or its internal temperature
sensor is shorted. If this message appears, carefully check if the MX60’s heat
sink is extremely hot. The heat generated by the MX60, and therefore its
losses, is
No error message for CC fan
The fan should cycle from battery power off start up.
I e never seen a CC produce zero watts. Reduced yes
While the fan might be broken I don’t think that explains the issue.
> On Apr 23, 2024, at 11:36 AM, William Miller via RE-wrenches
> wrote:
>
> If the
If the fan fails would there be an error message? As always, I looked this
up before posting. The manual is not clear on the matter.
William
Miller Solar
17395 Oak Road, Atascadero, CA 93422
805-438-5600
www.millersolar.com
CA Lic. 773985
-Original Message-
From: RE-wrenches
Thanks for the input. The battery is a 48v set up and without having the
generator backup the voltage is starting to get to 46v and below. I hope I
didn’t make a mistake, but I did a quick calc thinking about the input limits
of the CC and got 2400w based on the solar panel nameplate which
It may be the fan. I had an FM 80 where the fan went bad that caused very
limited solar production throughout the day.
Michael D Nelson
MD Electric & Solar, Inc.
707-684-0064 mobile
707-884-1862 office
www.mdelectricsolar.com
www.facebook.com/mdelectricandsolar
> On Apr 23, 2024, at 6:54 AM,
HI Jim,
The CC is sure suspect.
You didn’t mention what the battery voltage is.
Those CC have a hard PV watt input limit.
You can try and set it back to factory default and then reprogram, sometimes
that works.
I don’t use the FM-60, but always the FM-80 because of the fan replacement.
I'm troubleshooting the solar aspect of a small offgrid 120v outback system
and need some opinions. The customer was complaining that the generator
was running too much so I went out to their property and investigated. The
solar array consists of 16 total panels (4 strings of 4). At the
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