BrentO2

A64Pilot: There is NO cost for the STC per se, as you buy a TSO Battery and STC Install Kit. All Data will be on the Website your A&P can access. The install kit includes the LED Caution Light, a Placard, and misc. parts such as Teflon vent tubing and connections. Here is the DRAFT install kit. See the Website for more EarthX info, such as the IMM, I am the Consultant DER for them, not a FT employee. BrentO Palm Harbor, FL Loveland, CO ETX900-TSO-35-M20-KIT 35Ah Battery Install Parts Kit.pdf

A64Pilot: EarthX ETX900-TSO Battery AML STC SA01005DE. 5.4 Lbs, meets all the latest FAA Requirements (TSO-C179b) including all 9 Special Conditions of AC 20-184 for installations. We are adding to the AML. BrentO

Got it! Thanks. I do have a couple of messages into support at Mooney. Looks like we exclude M20G then, will adjust the list. Thanks again.

M20 Folks: Does anyone have an idea where I can get ALL the Parts Catalogs for the M20 Series? I have one, but it does not cover the entire series. I only need up to M20K to Serial 0999, as it looks like 24V Battery starts at 25-1000. BrentO

Hank, we will be getting there on 14V, Firewall Forward, just not this round of AML STC. Thanks a lot for the info on the 12V (14V Elec System) it is good to know all are 12 Volt Batteries. Looks like 28 V came later in the M20 Series. I can see that one easily, the issue I have is I thought the FW Aft started at M20E (470E), but one member says G too. So ":More Research" is needed... I appreciate your response.

Thanks again folks! The MEC (Model Evaluation Checklist) in the IMM is key as there are limitations (Such as Over Voltage Protection and Alternator 80A or less). As a pilot and aircraft owner/builder myself, CG is watched closely, but as you all point out, many factors are at play. Interesting to hear about the forward CG. Every Model serial number is different based on STC's installed or Mod's done on any given airplane. It is a must to run the checklist to ensure your model is eligible. Unfortunately, the FAA is rather slow right now, so we are sorry this is taking so long. Stay tuned, the 28V may be a good deal for many of you as it will also be FWF qualified. Cheers! Brent G. Olsen, P.E. (FAA DER)

Thanks Gents! Per a request, more info is on my Website: OlsenTechLLC.com, but I am an Air Force and Navy (Naval Air) Veteran with Masters in Electrical Engineering/Mgt. I am an FAA DER - Electrical Systems & Equipment in the Denver area. I have worked these Li Batteries now for over 15 years starting with Aircell/GOGO, and this EarthX is the best and a great life and price point. The fact it was the first battery to meet TSO-C179b (not older "a") is important as this one passed (well) all the RTCA DO-311A and DO-347 applicable regulations (Consensus standards) to Part 23 series reg's, even 23.2525, etc. Requirements have evolved for sure, but the Nine Special Conditions for Lithium batteries to AC 20-184 were easily met. This battery is top notch in my review, and based on many years of product development and FAA experience. Life of 6 Years or more is expected if you just take care of them. Special LiFePO4 chargers are important. One important note for at least one of you is the fact they DO really crank! Way better than the other lead-acid or gel-cells. Not to mention the weight, of course. And, after the very first crank they internally heat and work fine down to -20C - for first crank where we tested in Colorado in the winter (with battery cold soak at -20C 3 hours). My experience (and PoH's) do not recommend the crank at those very low temps for a lot of other more important reasons and why we have heaters in Alaska, for instance. After that first crank on the C182P, it cranked very well due to that internal heating. If less than -20C, then consider a local heat application. Does not take a lot as the battery is only 5.4Lbs mass. Again, what I see is after that first crank it goes like mad! On firewall forward, I thank you all for the direction. I see now that Models A-D are FWF and starting at Model E, SN 470 they transition to AFT installation. We will exclude (for now) the FWF, but stay tuned. We soon will have the 28V battery FWF. Thank again all, appreciate you as I am new to Mooney. Cheers! BrentO

Folks: Does anyone know how I can figure out what Models of M20, and what Serial numbers may have Batteries Firewall forward? I thought they were all aft area, but looks like that is NOT true. Help! BrentO2 - FAA DER, Electrical