<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">Hi Michael </div><div dir="ltr"><br></div><div dir="ltr">Do you know if Discover is coming out with larger Helios batteries? 30 amp hrs is pretty small. </div><div dir="ltr"><br></div><div dir="ltr">And thanks everyone for the answers. </div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">As to the blue planet, I don’t think they need heaters. I was working on a system with one and the battery housing was darn warm, much warmer than anything else in the inverter room. Surprising actually. </div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Jul 21, 2022, at 10:18 PM, Michael Morningstar via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">1st line of defense: Agricultural seed tray heat mats w/ integral T-stat<div>2nd LOD: Empire wall heater (no electronics) w/ industrial temperature controlled relay (TCR) (similar to a thermostat) set to 38 degrees</div><div>3rd LOD: Battery side of charge controller circuits have TCR controlled contactors to break circuit if 1 and 2 fail</div><div><br></div><div>Redundancy is key here. We learned the hard way when a system we designed relied on a common battery powered T-stat that controlled a propane wall heater. Brand new Energizer Lithium AA didn't last a winter. Ouch</div><div><br></div><div>All of this will be moot soon. We are about to build a half dozen systems with Discover's Helios in the next few months. Internal heaters like Battleborns but with Discover's superior architecture and components. This is the future.</div><div><br></div><div>This is for NorCal >6K elevation installations. In colder climates I'd insist on conditioned and supervised spaces</div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 21, 2022 at 8:56 PM frenergy via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Jay,<br>
<br>
With the SimpliPhi's we've been installing we require a <br>
shed on slab, walls R-21, roof, R-38 and then the smallest propane wall <br>
heater (they use zero power to operate) we can find and set it at 55 <br>
degrees. No need for the insulated box or fretting about toasting $20K+ <br>
in batteries. It would be nice to find one with a thermostat that goes <br>
down to 45 degrees.<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>
<br>
On 7/21/2022 2:30 PM, jay via RE-wrenches wrote:<br>
> HI All,<br>
><br>
> As I get more calls for offgrid designs with lithium batteries I”m wondering what you all are doing to keep the batteries warm when it gets cold. For some of you 0 F will seem mild, others super cold.<br>
><br>
> Doing a battery box and heating that or heating the whole inverter/battery shed?<br>
><br>
> I’m definitely not looking at batteries like battle born with the built in heaters.<br>
><br>
> Simpliphi, Discover, some of the newer server rack ones ( UL listed), etc.<br>
><br>
><br>
> Thanks in advance<br>
><br>
> Jay<br>
><br>
><br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr">
<p style="margin:0px;font:18px Helvetica;min-height:22px"><span></span></p>
<p style="margin:0px;font:18px Helvetica">Michael Morningstar</p><p style="margin:0px;font:18px Helvetica"><br></p><p style="margin:0px;font:18px Helvetica">Morningstar Electric</p><p style="margin:0px;font:18px Helvetica">PO Box 1494</p><p style="margin:0px;font:18px Helvetica">Mount Shasta, CA 96067</p><p style="margin:0px;font:18px Helvetica">530-921-0560</p><p style="margin:0px;font:18px Helvetica"><a href="mailto:mjmorningstar@gmail.com" target="_blank">mjmorningstar@gmail.com</a></p><p style="margin:0px;font:18px Helvetica"><img width="200" height="118" src="https://ci3.googleusercontent.com/mail-sig/AIorK4xkNeAOHZC3SDnZTmnhgML4JHyGwi0PdmG_TrSHASBRfwJtZqGi7vknpXAngaaiawfnr5xCF1Y" data-unique-identifier=""><br></p></div></div>
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