transformer inverter vs. transformerless inverter - worth the savings?

[Jest Waitn]

it meets nec 2011.

[Jest Waitn]

What electrical code? This is not meant to be insult but if you do not know the protections that might be missing from said old stock inverters being dumped into the market, you probably shouldn't be using.

it includes a dc disconnect that disconnects under load (if needed) and it has AFCI. so it doesn't really seem to be lacking much. i started off asking about a choice between two inverters one with transformer, and one without. you said to avoid the transformer inverter. fair enough. so, what external equipment might be missing? and no, i'm not familiar with a transformer inverter.

[adoublee]

What electrical code? This is not meant to be insult but if you do not know the protections that might be missing from said old stock inverters being dumped into the market, you probably shouldn't be using.

[Jest Waitn]

You'll have to add additional external equipment to meet current codes. Not worth the savings IMO.

what additional equipment?

[adoublee]

You'll have to add additional external equipment to meet current codes. Not worth the savings IMO.

[Jest Waitn]

some quality transformer inverters are now available at a reduced price, typically for about half of what a transformerless one costs. so if i could buy a transformer inverter for about $750 vs. a transformerless one for $1500, is it worth saving the $?