# Transformerless inverters
**URL:** https://forum.cleanenergyreviews.info/t/transformerless-inverters/977
**Category:** Solar Questions and Comments
**Created:** [March 19, 2019, 1:00pm UTC](https://forum.cleanenergyreviews.info/t/transformerless-inverters/977 "2019-03-19T13:00:00Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@blauvelt](https://forum.cleanenergyreviews.info/u/blauvelt)
#### Post date: [March 19, 2019, 1:00pm UTC](https://forum.cleanenergyreviews.info/t/transformerless-inverters/977/1 "2019-03-19T13:00:00Z")
Do I need a step up transformer for a residential installation or will a TL inverter do?
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### Author:  [@Marty](https://forum.cleanenergyreviews.info/u/Marty)
#### Post date: [March 26, 2019, 11:01am UTC](https://forum.cleanenergyreviews.info/t/transformerless-inverters/977/2 "2019-03-26T11:01:48Z")
I think you’d be hard pressed to find a residential inverter with a transformer these days. What brands are you comparing?
> [@Solid State vs Rotary inverters | Transformer vs transformerless](https://perform.discoursehosting.net/t/solid-state-vs-rotary-inverters/177):
>
> I was advised that when I get solar installed I should make sure I get a solid state inverter not a rotary. (I gather this is like the HD on a computer). I can’t see any specs when I look at inverters that give me this info. Are rotary inverters now out moded?
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### Author:  [@Svarky](https://forum.cleanenergyreviews.info/u/Svarky)
#### Post date: [May 21, 2020, 6:32am UTC](https://forum.cleanenergyreviews.info/t/transformerless-inverters/977/3 "2020-05-21T06:32:06Z")
@blauvelt
All modern solar inverters use a transformerless design due to the low cost and high efficiency. The inverters operate with a wide PV input voltage range usually from 100V up to 600V DC.
Transformers are only really used these days in the more powerful [off-grid battery inverter-chargers](https://www.cleanenergyreviews.info/blog/2015/7/1/hybrid-interactive-and-solar-inverter-combination) which need to power appliances with high surge loads.
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### Author:  [@Isla](https://forum.cleanenergyreviews.info/u/Isla)
#### Post date: [May 22, 2021, 11:12am UTC](https://forum.cleanenergyreviews.info/t/transformerless-inverters/977/4 "2021-05-22T11:12:14Z")
The benefits of using a transformerless inverter are that it’s much lighter in weight than inverters with transformers, it offers higher efficiency ratings and it’s also capable of dual MPPT inputs, but it depends upon manufacturer.