# Taz 3 power supply upgrade

**URL:** <https://forum.lulzbot.com/t/taz-3-power-supply-upgrade/3010>\
**Category:** LulzBot TAZ\
**Created:** [February 24, 2016, 1:19am UTC](https://forum.lulzbot.com/t/taz-3-power-supply-upgrade/3010 "2016-02-24T01:19:14Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jaded](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@jaded](https://forum.lulzbot.com/u/jaded)\
**Post date:** [February 24, 2016, 1:19am UTC](https://forum.lulzbot.com/t/taz-3-power-supply-upgrade/3010/1 "2016-02-24T01:19:14Z")

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I am currently in the process of upgrading my Taz 3 to a Taz 4.5/5. Basically, upgraded the Z axis and the hotend but not the heated bed. I am currently using the 24v/15A 360W power supply. Will I need the 500W power supply to get the hotend all the way up to 300C (or anywhere above 250-260C all while heating the bed up to 85-90C?

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**Author:** ![piercet](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/piercet/32/12_2.png) [@piercet](https://forum.lulzbot.com/u/piercet)\
**Post date:** [February 24, 2016, 1:27am UTC](https://forum.lulzbot.com/t/taz-3-power-supply-upgrade/3010/2 "2016-02-24T01:27:37Z")

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I’m still using the old one with mine, but it could probably use a bit more power.

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**Author:** ![jaded](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@jaded](https://forum.lulzbot.com/u/jaded)\
**Post date:** [February 24, 2016, 1:31am UTC](https://forum.lulzbot.com/t/taz-3-power-supply-upgrade/3010/3 "2016-02-24T01:31:46Z")

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Well, I thought about grabbing a pair of server power supplies on eBay. They’re usually about $25 for a pair. 12V and 47A and putting them in series (taking some grounding precautions of course) to get 24V 47A for a total of about 1200W… total overkill, however, it’s $25 and the form factor is not that much bigger than the current PS.

 ![tjintech-howto-24V_47A-05.jpg](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/2/20791349ec5976fdc7e9607d3f0ecb1f7516c547.jpeg)

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**Author:** ![kmanley57](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kmanley57](https://forum.lulzbot.com/u/kmanley57)\
**Post date:** [February 24, 2016, 1:54am UTC](https://forum.lulzbot.com/t/taz-3-power-supply-upgrade/3010/4 "2016-02-24T01:54:35Z")

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The extruder is not the big load for the supply.

The heat bed is the one that will have a problem reaching the temps.

Plus the closer you are to the max rating of the supply the less efficient it is operating. AKA - the more it heats up.