# EmonPi purchase options - sd cards

**URL:** <https://community.openenergymonitor.org/t/emonpi-purchase-options-sd-cards/16240>\
**Category:** emonPi\
**Created:** [11 December 2020 11:55 UTC](https://community.openenergymonitor.org/t/emonpi-purchase-options-sd-cards/16240 "2020-12-11T11:55:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jim.o](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/jim.o/32/35169_2.png) [@jim.o](https://community.openenergymonitor.org/u/jim.o)\
**Post date:** [11 December 2020 11:55 UTC](https://community.openenergymonitor.org/t/emonpi-purchase-options-sd-cards/16240/1 "2020-12-11T11:55:26Z")

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Hi guys

When ordering an emonPi, there are two options for the SD card.  
What’s the difference between the standard SD card and the industrial SLC one?  
I see another community comment that the SLC is not more reliable.

Cheers!

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**Author:** ![Robert.Wall](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/robert.wall/32/38246_2.png) [@Robert.Wall](https://community.openenergymonitor.org/u/Robert.Wall)\
**Post date:** [11 December 2020 15:20 UTC](https://community.openenergymonitor.org/t/emonpi-purchase-options-sd-cards/16240/2 "2020-12-11T15:20:33Z")

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There was a comment here about 3 months ago:

> [@SD card durability: Industrial SLC NAND SD cards?](https://community.openenergymonitor.org/t/sd-card-durability-industrial-slc-nand-sd-cards/15537):
>
> We’ve put considerable effort into controlling the amount of writing the emonPi does to an SD card to prolong SD card life. The results seem to be pretty good, we’ve had SD card running for a number of years without any issues. However, there has been occasional reports of SD cards failing prematurely. Especially after power cuts. We usually use standard [Kingston SDCS2/16GB](https://docs.rs-online.com/1360/A700000006563904.pdf) micro SD cards. Frustratingly SD card datasheets don’t quote expected write limits. I’m considering doing some testing wi…

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**Author:** ![jim.o](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/jim.o/32/35169_2.png) [@jim.o](https://community.openenergymonitor.org/u/jim.o)\
**Post date:** [14 December 2020 08:23 UTC](https://community.openenergymonitor.org/t/emonpi-purchase-options-sd-cards/16240/3 "2020-12-14T08:23:02Z")

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Thanks!

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**Author:** ![cyberelectronics](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/cyberelectronics/32/16416_2.png) [@cyberelectronics](https://community.openenergymonitor.org/u/cyberelectronics)\
**Post date:** [7 January 2021 14:40 UTC](https://community.openenergymonitor.org/t/emonpi-purchase-options-sd-cards/16240/4 "2021-01-07T14:40:17Z")

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You can check other industrial cards also (Swissbit, Goodram, Delkin Devices).  
On RPi’s, for different projects we use Swissbit, with success (for 3-4 years and counting).

> **[3166531.pdf](https://www.farnell.com/datasheets/3166531.pdf)**
>
> 138.87 KB