# Net charge after solvation

**URL:** https://gromacs.bioexcel.eu/t/net-charge-after-solvation/10953
**Category:** User discussions
**Created:** [January 6, 2025, 1:37pm UTC](https://gromacs.bioexcel.eu/t/net-charge-after-solvation/10953 "2025-01-06T13:37:48Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![shristika](https://avatars.discourse-cdn.com/v4/letter/s/8e8cbc/32.png) [@shristika](https://gromacs.bioexcel.eu/u/shristika)
#### Post date: [January 6, 2025, 1:37pm UTC](https://gromacs.bioexcel.eu/t/net-charge-after-solvation/10953/1 "2025-01-06T13:37:48Z")

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GROMACS version: 2019.5  
GROMACS modification: No

I keep getting a net charge after the solvation in the system. The itp file has a charge of zero and the net charge points to the topol file, sol line. How do i fix this?  
[topol.top](https://gromacs.bioexcel.eu/uploads/short-url/6wG6gCJdtpmcOTUkefDIUk7wFOT.top) (201 Bytes)

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### Author: ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)
#### Post date: [January 7, 2025, 8:21am UTC](https://gromacs.bioexcel.eu/t/net-charge-after-solvation/10953/2 "2025-01-07T08:21:10Z")

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Could you post the itp file somewhere? Are you sure it really has a net charge of 0?

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### Author: ![shristika](https://avatars.discourse-cdn.com/v4/letter/s/8e8cbc/32.png) [@shristika](https://gromacs.bioexcel.eu/u/shristika)
#### Post date: [January 7, 2025, 4:40pm UTC](https://gromacs.bioexcel.eu/t/net-charge-after-solvation/10953/3 "2025-01-07T16:40:44Z")

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I did check the itp file and the charges seem to be inconsistent for the same opls number, ill correct it and update.

Thanks!