{"id":1763,"date":"2014-07-16T18:10:10","date_gmt":"2014-07-17T00:10:10","guid":{"rendered":"http:\/\/www.velocity-xl.com\/blog\/?p=1763"},"modified":"2015-01-27T18:18:30","modified_gmt":"2015-01-28T00:18:30","slug":"13-8-1-efis-alternate-power","status":"publish","type":"post","link":"https:\/\/www.velocity-xl.com\/blog\/2014\/07\/16\/13-8-1-efis-alternate-power\/","title":{"rendered":"13.8.1 EFIS alternate power"},"content":{"rendered":"
This entry is part 52 of 67 in the series 13 - Electrical \/ Instruments<\/a><\/div><\/div><\/div>

One of the problems with a 28v electrical systems is that some of the goodies that are available for 14v electrical systems don’t exist for 28v.<\/p>\n

One of those “goodies” is a backup battery for the EFIS. During engine start, the battery power will drop. If it goes below around 19v, the EFIS shuts down. Now it takes the EFIS about a minute to power up and it displays engine information. So if it drops offline when I start the engine, I won’t know what’s going on with the engine for about one minute.<\/p>\n

Grand Rapids sells a backup battery that will keep the EFIS up if the primary power drops off. But it’s only available for the 14v version.<\/p>\n

I thought about getting a small 24v, 5amp battery for this purpose, but then I’ve got a deal with finding a place for it, wiring it into the existing electrical system so it can recharge, etc.<\/p>\n

TCW Technologies (who make the trim controller) also have, what they call, an Intelligent Power Stabilizer (IPS). As long as there’s about 12v coming in, it will put out a steady 24v. So I purchased one and tested it out. I was able to drop the input power to about 10v before the output dropped below 24v.<\/p>\n

I went it install it on my avionics sub-shelf but I realized that I wouldn’t have anyplace for my GPS.<\/p>\n

Here’s version 1 of the sub-shelf.<\/p>\n

\"2013-12-06<\/a><\/p>\n

So I had to add another level to the shelf.<\/p>\n

\"2014-07-16<\/a><\/p>\n

The IPS unit is on the lower shelf. The GPS will go above the IPS on the top shelf.<\/p>\n","protected":false},"excerpt":{"rendered":"

This entry is part 52 of 67 in the series 13 - Electrical \/ Instruments<\/a><\/div><\/div><\/div>

One of the problems with a 28v electrical systems is that some of the goodies that are available for 14v electrical systems don’t exist for 28v. One of those “goodies” is a backup battery for the EFIS. During engine start, … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[46],"tags":[],"series":[37],"class_list":["post-1763","post","type-post","status-publish","format-standard","hentry","category-46","series-13-electrical-instrumentation"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts\/1763","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/comments?post=1763"}],"version-history":[{"count":1,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts\/1763\/revisions"}],"predecessor-version":[{"id":1970,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/posts\/1763\/revisions\/1970"}],"wp:attachment":[{"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/media?parent=1763"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/categories?post=1763"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/tags?post=1763"},{"taxonomy":"series","embeddable":true,"href":"https:\/\/www.velocity-xl.com\/blog\/wp-json\/wp\/v2\/series?post=1763"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}