If you have the recombiner caps on the cells they are safe to vent inside your house. Still best to build a sealed box for them with vents to the outside or a hydrogen sensor and fan.
Our local building codes actually specify all of this stuff depending on the type of battery and size. From: Ken Hohhof Sent: Tuesday, February 07, 2017 10:37 AM To: [email protected] Subject: Re: [AFMUG] Particularly good recent battery deals? Those are flooded batteries not AGM, right? Kind of an apples-to-oranges comparison. If they are in a somewhat temperature controlled environment, and not in your basement venting gasses into your house, flooded might be a valid choice and would typically be around half the price of AGM. From: Af [mailto:[email protected]] On Behalf Of Harold Bledsoe Sent: Tuesday, February 7, 2017 10:27 AM To: [email protected] Subject: Re: [AFMUG] Particularly good recent battery deals? Sure. Supposedly the plates are a good bit thicker than even high-end deep cycle batteries so they can be cycled daily at the same DOD 3-5 times more than what a GC2 would be able to do. Here's an article that has more info: https://www.sustainablepreparedness.com/index.php/blog/the-best-kept-secret-in-renewable-energy -Hal On Tue, Feb 7, 2017 at 11:14 AM Ken Hohhof <[email protected]> wrote: Define “last”. From: Af [mailto:[email protected]] On Behalf Of Harold Bledsoe Sent: Monday, February 6, 2017 6:38 PM To: [email protected] Subject: Re: [AFMUG] Particularly good recent battery deals? Agreed! I'm going to pull the trigger and try the forklift batteries. Supposedly they will last 3-5x longer than regular deep cycle golf cart batteries. I'll let you guys know in 10-15 years. My motivation is that my home grid tied system saves too much power so the power company added a net meter fee of $7/kw/mo to make up the difference. Alrighty then, guess I'll take half my house off grid. :-) Hal On Mon, Feb 6, 2017 at 1:27 PM Eric Kuhnke <[email protected]> wrote: Anything rated in CCA (cold cranking amps) is not suitable for cyclic solar/wind power applications. If the manufacturer hasn't clearly specified Ah capacity in a table at 5, 10, 20 hour rates it's not designed for repeated discharge. On Mon, Feb 6, 2017 at 5:01 AM, Harold Bledsoe <[email protected]> wrote: Beware of deep cycle marine batteries. These typically are not true deep cycle batteries. At 50% depth of discharge, you can expect around 300 cycles (or 1 year if doing it daily). A true deep cycle battery will do about 3x that number. On Sun, Feb 5, 2017 at 9:00 PM Keefe John <[email protected]> wrote: Exide has a 105 AH battery for $81 http://www.menards.com/main/electrical/batteries-battery-chargers/automotive-lead-acid-batteries/exide-regng-27-12-month-nautilus-marine-deep-cycle-battery/p-1444430136307-c-9100.htm?tid=-3310133469912273928 On February 5, 2017 4:55:55 PM CST, Eric Kuhnke <[email protected]> wrote: Found this, sunelec.com (big solar equipment dealer for off grid) is selling the 106Ah version of these for $185 a piece plus pallet shipping: http://www.outbackpower.com/downloads/documents/Store_the_Energy/energycell_re_top_terminal/energycellREtopterminal_specsheet.pdf Outback, as far as I know, doesn't actually have a battery factory. But they are a fairly large company so they are relabeling somebody else's deep cycle off grid design AGM battery. In terms of $/Wh stored the only thing that beats it is the 6V 225Ah wet cell batteries from Trojan. On Sat, Feb 4, 2017 at 6:00 AM, Harold Bledsoe <[email protected]> wrote: I can across an interesting tip / option - Have you considered going with forklift batteries? They are flooded lead acid however I'm reading that they can last 3x longer than golf cart batteries in PV applications. http://gbindustrialbattery.com/Forklift_Battery_Sizes_and_Specifications_Zone15.html I guess the weight is a downside. Just make sure the whole family eats their Wheaties on moving day. :-) Hal On Thu, Feb 2, 2017 at 7:11 PM Eric Kuhnke <[email protected]> wrote: Looking for a bunch of 12V 100Ah AGM top terminal batteries for off grid PV. Wondering if anyone has recently got a particularly good deal for something like the Trojan T31 or similar. -- Harold Bledsoe -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- Harold Bledsoe -- Harold Bledsoe
