[RE-wrenches] Lithium Ion Batteries
Kent Osterberg
kent at coveoregon.com
Sun Mar 22 20:37:15 EDT 2020
Jay,
Do you mean: use the Aux relay to activate the Remote Power Off? What is
the low battery setting range for the Aux relay? I don't see it in the
manual.
Kent Osterberg
Blue Mountain Solar
On 3/22/2020 4:04 PM, Jay wrote:
> Ray,
> Have you heard bought about using the Aux relay to control the AC
> output at what ever voltage you want?
>
> Jay
>
>
>
>
>> On Mar 22, 2020, at 3:13 PM, Ray <ray at solarray.com> wrote:
>>
>>
>>
>> That's the whole point: we need the LBCO to be higher than 48v to
>> catch the beginning of that steep drop off, so that there is still
>> enough reserve left to keep the monitoring and solar charge
>> controllers in operation, and avoid the dreaded dark start. With
>> Simpliphi, we don't have the dark start, but it still requires manual
>> reset. This isn't theoretical, we have been having serious trouble
>> with a system because of Schneider's inability to set the LVD above
>> 48 v. Also setting the voltage higher (lower DOD) extends the cycle
>> life of these batteries. Otherwise, I love the stable 51 volts of
>> Li+, even under load.
>>
>> Ray Walters
>> Remote Solar
>> 303 505-8760
>> On 3/22/20 4:15 PM, Jerry Shafer wrote:
>>> Wrenches
>>> Don't let the LBCU scare you as this battery has such a flat SOC
>>> line that when it falls off there is not much left in the tank. In
>>> addition set the flex net to low SOC at 15% and critical to 10%.
>>>
>>> On Sun, Mar 22, 2020, 12:15 PM Sindelar Solar
>>> <Allan at sindelarsolar.com <mailto:Allan at sindelarsolar.com>> wrote:
>>>
>>> Specifically with Blue Ion, the installation manual recommends
>>> 48V as LBCO, but also recommends setting it a bit higher:
>>>
>>> "Recommended Low Voltage Disconnect Setting: 48 VDC (~2-10%
>>> State of Charge)
>>> BMU will power down the Blue Ion 2.0 cabinet at 44 VDC (<1%
>>> State of Charge)
>>> Based on system discharge patterns, SoC and voltage correlations
>>> will vary.
>>> We recommend you err on the side of caution with a higher LVD
>>> setting and adjust as necessary.
>>> To prevent a dark start event, we recommend leaving a little
>>> reserve “fuel in the tank”."
>>>
>>> I have used 48VDC with success, and had one system indeed shut
>>> down at 44V, leaving 1% left to reboot.
>>>
>>> Allan
>>>
>>> On 3/22/2020 12:44 PM, Ray wrote:
>>>>
>>>> Blue Ion, and Simpliphi that I know of.
>>>>
>>>> Ray Walters
>>>> Remote Solar
>>>> 303 505-8760
>>>> On 3/21/20 2:48 PM, Dave Angelini Offgrid Solar wrote:
>>>>>
>>>>> I see what you mean Ray. Sorry I misread your mail. There are
>>>>> not too many batteries out there that need LBCO above 48V.
>>>>> Which ones are you talking about please?
>>>>>
>>>>> *Dave Angelini Offgrid Solar*
>>>>>
>>>>> *"we go where powerlines don't"
>>>>> http://members.sti.net/offgridsolar/ e-mail
>>>>> offgridsolar at sti.net <mailto:offgridsolar at sti.net> text 209
>>>>> 813 0060*
>>>>>
>>>>> On Sat, 21 Mar 2020 11:18:21 -0700, Dave Angelini Offgrid
>>>>> Solar <offgridsolar at sti.net> <mailto:offgridsolar at sti.net> wrote:
>>>>>
>>>>>> Hi Ray,
>>>>>>
>>>>>> Which XW? There are 3 now. The old graybox XW defaults at 44V
>>>>>> LBCO and the range is 40 to 48V. There also was firmware back
>>>>>> in its day that got older units updated. Schneider still has
>>>>>> the firmware under discontinued products.
>>>>>>
>>>>>> XW+ is default 44V and adjustable 36 to 44 vdc.
>>>>>>
>>>>>> XW pro is running downstairs and I will take a look. It would
>>>>>> be my guess that it is the same as XW+. I think one needs to
>>>>>> be sure they are in Advanced settings to tweak LBCO also.
>>>>>>
>>>>>> I am not plugging Schneider and have done work for both
>>>>>> Outback and Schneider as well as my clients. Hope this helps.
>>>>>>
>>>>>> *Dave Angelini Offgrid Solar "we go where powerlines don't"
>>>>>> http://members.sti.net/offgridsolar/ e-mail
>>>>>> offgridsolar at sti.net <mailto:offgridsolar at sti.net> text 209
>>>>>> 813 0060*
>>>>>>
>>>>>> On Sat, 21 Mar 2020 11:46:21 -0400, Ray <ray at solarray.com>
>>>>>> <mailto:ray at solarray.com> wrote:
>>>>>>
>>>>>> We've been having good luck with SImpliphi, the pricing
>>>>>> has recently gotten much more competitive. As it's names
>>>>>> states, its simple. Each 3.8 kWh unit has an 80 amp
>>>>>> breaker built into the top, weigh about 75 lbs, and are a
>>>>>> bit smaller than an L16 but with carry handles. We use
>>>>>> an insulated 2 pole combiner block to run all the
>>>>>> parallel conductors to the main 2/0 cable. No
>>>>>> monitoring, but they do have an handy setup guide with
>>>>>> recommended settings, specific for each manufacturer
>>>>>> (including Outback).
>>>>>>
>>>>>> Note to all: Schneider XW can still not set its LVD
>>>>>> above 48, which basically makes it incompatible with most
>>>>>> Li+ batteries. Their tech support has been abysmal as
>>>>>> well. We're looking forward to them as one of the
>>>>>> larger companies in the business, to put additional
>>>>>> resources into their engineering, and come out with at
>>>>>> least a firmware update to correct this problem.
>>>>>>
>>>>>> Ray Walters
>>>>>> Remote Solar
>>>>>> 303 505-8760
>>>>>>
>>>>>> On 3/20/20 3:59 PM, David Katz wrote:
>>>>>>
>>>>>> Hello Wrenches,
>>>>>> I am working with some people that want to use a 20
>>>>>> kw-hour to 30 kw-hour 48 volt lithium-ion battery
>>>>>> with an Outback Radian and Outback FM charge controllers.
>>>>>> They are considering using Discover, Blue-Ion, Battle
>>>>>> Born or SimpliPhi batteries.
>>>>>> Does any one have any recommendations of which
>>>>>> battery functions best with the Outback system.
>>>>>> Thanks,
>>>>>> David Katz
>>>>>>
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>>> --
>>>
>>> *Allan Sindelar*
>>> allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
>>> NABCEP Certified PV Installation Professional
>>> New Mexico EE98J Journeyman Electrician
>>> Founder (Retired), Positive Energy, Inc.
>>> *505 780-2738 cell*
>>>
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