<div dir="auto"><div>I am trying out an insulated box and small heater. It doesn't get very cold in West Coast scotland so 120W seems useful. Also automatic vents used on greenhouses, to open up the sealed box.<br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri 17 May 2019, 18:09 Dave Angelini Offgrid Solar, <<a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The risk may be worth it if the battery is inexpensive.<br>
<br>
I have a client who has a neighbor who had to leave his home in Canada<br>
for a funeral. Things snowballed and the road washed out. He could not get<br>
home for a week and lost his well over 10K LFP battery. The battery logged<br>
the temp and warranty was void.<br>
<br>
I would want to see data over time before I used a battery that depended<br>
on the BMS for temp control. The other thing would be a company large<br>
enough to handle warranty if things got bad.<br>
<br>
The successful offgrid home people in cold climates are instructed by me<br>
to turn off the battery when they leave home and use a LA battery while<br>
they are gone.<br>
<br>
Dave Angelini Offgrid Solar<br>
"we go where powerlines don't"<br>
<a href="http://members.sti.net/offgridsolar/" rel="noreferrer noreferrer" target="_blank">http://members.sti.net/offgridsolar/</a><br>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank" rel="noreferrer">offgridsolar@sti.net</a><br>
text 209 813 0060<br>
<br>
On Fri, 17 May 2019 08:58:42 -0700, frenergy <<a href="mailto:frenergy@psln.com" target="_blank" rel="noreferrer">frenergy@psln.com</a>> wrote:<br>
> Jay,<br>
> <br>
> I would think this might be pretty risky....I think of the<br>
> difficulty in being sure all the cells were uniformly warmed. I guess <br>
> if they were in an enclosure and the ambient in there was held at some <br>
> determined temp for ? (many) hours then one could assume? all the cells <br>
> were close in temp and safe to charge. Of course there would have to be<br>
<br>
> some sort of regulation involved (oops I left the heater on in the <br>
> battery enclosure last week!)<br>
> <br>
> Bill<br>
> <br>
> Feather River Solar Electric<br>
> Bill Battagin, Owner<br>
> 4291 Nelson St.<br>
> Taylorsville, CA 95983<br>
> 530.284.7849<br>
> CA Lic 874049<br>
> <a href="http://www.frenergy.net" rel="noreferrer noreferrer" target="_blank">www.frenergy.net</a><br>
> <br>
> On 5/16/2019 4:41 PM, jay wrote:<br>
>> HI All,<br>
>><br>
>> I\u201dm wondering if anyone has suggestions about how to charge a Lithium<br>
>> battery in RV or in this case Polarius in sub zero temps.<br>
>><br>
>> Are there batteries that have heaters built in, or is it still a custom<br>
>> design issue to build a heating system?<br>
>> ( insulation and heaters)<br>
>><br>
>> Thanks,<br>
>><br>
>> jay<br>
>><br>
>> peltz power<br>
>><br>
>><br>
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-- <br>
Dave Angelini Offgrid Solar<br>
"we go where powerlines don't"<br>
<a href="http://members.sti.net/offgridsolar/" rel="noreferrer noreferrer" target="_blank">http://members.sti.net/offgridsolar/</a><br>
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</blockquote></div></div></div>