in the forms/fd_solarcompact_solarcompact.css file, change:
form.SolarCompact_SolarCompact fieldset.SolarCompact_SolarCompact {
border:1px solid #adadad;
padding:5px 0 0 0;
margin:3px 3px 3px 3px;
border-right-width:0;
border-bottom-width:0;
border-left-width:0;
}
to:
form.SolarCompact_SolarCompact fieldset.SolarCompact_SolarCompact {
border:0;
padding:5px 0 0 0;
margin:3px 3px 3px 3px;
}