ZerokW
Upload a site list in any format
Upload a site list
Any format, any column order. CSV, tab, semicolon or pipe delimited, or an Excel .xlsx. Extra columns are ignored and a title row above the header is fine.
What it looks for. A site name and a ZIP are the minimum — everything else is a bonus. If you also have kWh, peak kW and annual spend, the report can rank sites by what is actually recoverable rather than just by size.
Why we show you the mapping

Column detection uses the header wording and the cell contents, and content wins when they disagree — a column headed "Location" full of five-digit numbers is a ZIP, whatever it says at the top. That handles most real files, but not all of them, so nothing is committed until you have seen what was detected and had the chance to correct it.