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<blockquote data-quote="wkmac" data-source="post: 2778361" data-attributes="member: 2189"><p>The current problem with batteries are not the batteries themselves but the fact that our appliances among other things are big energy eaters. Refrigerators compressors have a huge power draw in start up, called in rush, and this places a huge drain on batteries. The world of 4 wheel overlanding, for which I have a Toyota Tundra on order to be here first of May just for that purpose, is addressing many of these type problems. The South African company <a href="https://www.youtube.com/watch?v=sg4e4dwECpw" target="_blank"><span style="color: #ff0000"><strong>National Luna</strong></span></a> was approached by Medical relief agencies about creating an off grid refrigerator to transport medicines in transport vehicles that could run of 12 volt automotive electrical systems without killing the battery. The solution was a compressor motor that instead of a hard instant start with a large in rush draw, the compressor came on using a step compressor that slowly ramps up. The unit is also super insulated and overlanders are taking these units out for days into weeks and keeping food both cold and frozen as there are freezer units too. All of them are easily powered with room to spare by AGM type batteries such as the Optima Bluetop. Coupled with vehicle roof top solar panel and the range is almost infinite. </p><p></p><p>Look at battery technology with power tools. We are not far away at all from battery power table saws as common as battery operated drills. Milwaukee tool makes a battery impact 3/4 drive as powerful as a 3/4 drive pneumatic impact and they last a surprising amount of time on a single battery charge. I use them at work and even I was very surprised at the power and the time between charges. Our automotive mechanics have them and take them on road calls, even for tractors and they have no problem changing tires. One mechanic got curious and decided to test the impact on a full tire change on a tractor and it handled the job with room to spare. Even spec'd out on lug nuts as each one was hit with a torque wrench and was spot on. I've taken my own air tools home and now use Milwaukee battery tools exclusively. </p><p></p><p>It all about draw and amphours. That is the secret. We have battery banks with 1000 amphours of capacity so storage is really not a problem. Power draw is another problem however and that is next step for renewable power to cross.</p></blockquote><p></p>
[QUOTE="wkmac, post: 2778361, member: 2189"] The current problem with batteries are not the batteries themselves but the fact that our appliances among other things are big energy eaters. Refrigerators compressors have a huge power draw in start up, called in rush, and this places a huge drain on batteries. The world of 4 wheel overlanding, for which I have a Toyota Tundra on order to be here first of May just for that purpose, is addressing many of these type problems. The South African company [URL='https://www.youtube.com/watch?v=sg4e4dwECpw'][COLOR=#ff0000][B]National Luna[/B][/COLOR][/URL] was approached by Medical relief agencies about creating an off grid refrigerator to transport medicines in transport vehicles that could run of 12 volt automotive electrical systems without killing the battery. The solution was a compressor motor that instead of a hard instant start with a large in rush draw, the compressor came on using a step compressor that slowly ramps up. The unit is also super insulated and overlanders are taking these units out for days into weeks and keeping food both cold and frozen as there are freezer units too. All of them are easily powered with room to spare by AGM type batteries such as the Optima Bluetop. Coupled with vehicle roof top solar panel and the range is almost infinite. Look at battery technology with power tools. We are not far away at all from battery power table saws as common as battery operated drills. Milwaukee tool makes a battery impact 3/4 drive as powerful as a 3/4 drive pneumatic impact and they last a surprising amount of time on a single battery charge. I use them at work and even I was very surprised at the power and the time between charges. Our automotive mechanics have them and take them on road calls, even for tractors and they have no problem changing tires. One mechanic got curious and decided to test the impact on a full tire change on a tractor and it handled the job with room to spare. Even spec'd out on lug nuts as each one was hit with a torque wrench and was spot on. I've taken my own air tools home and now use Milwaukee battery tools exclusively. It all about draw and amphours. That is the secret. We have battery banks with 1000 amphours of capacity so storage is really not a problem. Power draw is another problem however and that is next step for renewable power to cross. [/QUOTE]
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