A Energy Toolbase alternative for European battery studies
If Energy Toolbase doesn't fit your sites or your budget: what Zorowatt does differently, what it costs per year and how to move a site over.
Energy Toolbase (ETB Developer) is modelling and proposal software for solar and storage developers and installers in the US, sold alongside its own controller and monitoring hardware. Zorowatt is a self-serve browser tool for European business sites, with its prices on the website. (energytoolbase.com)
Five reasons consultants pick it.
- 01
The bill is checked against the invoices
Zorowatt rebuilds the bill from the meter data and sets it against each invoice, line by line, before it sizes anything. None of the tools we compared says it does this (checked 30 October 2026).
- 02
Dutch, German and Romanian tariffs, with sources
The 2026 tariffs of Liander, Stedin, Enexis, NEW Netz, Netze BW, RheinNetz and the Romanian ANRE zones are built in, each linked to its source. US tools leave European tariffs to you, in dollars.
- 03
Batteries from any maker
A database of 44 commercial products, every spec with its source. The free tools of Sungrow, SMA, Huawei and Victron size their own hardware only.
- 04
Prices on the page, from €0
A free analysis and free tools that need no account; Starter at €49 a month. Furo, Tibo, Gridcog and Energy Toolbase show no price before a call.
- 05
In the browser, in your language
A year of quarter-hours is simulated in about a second, with nothing to install, in English, Dutch, German and Romanian. HOMER, PVsyst and PV*SOL run on Windows.
Price per year
- Energy Toolbase
- No published price today; until March 2026, Lite $170 and Standard $224 per user a month, billed annually
- Zorowatt
- Starter €588 a year (€348 at the founding price) · Pro €1,788 a year for 3 seats · single analyses €15
As each vendor's page states it; prices in other currencies are not converted.
How to switch
Upload the interval data or Green Button file you imported into Energy Toolbase.
- Upload the site's meter data to the free data checker or the Workspace: every assumption made reading the file is listed.
- Pick the site's tariff and enter the invoices: the bill check shows whether the baseline matches before anything is sized.
- Size the battery, compare it with your earlier study, and send the client the PDF report.
- When to pick Energy Toolbase
- Pick Energy Toolbase if you develop solar and storage in the US and want rate and incentive modelling, proposals and the ETB Controller hardware from one company.
- When to pick Zorowatt
- Pick Zorowatt if your sites are in the Netherlands, Germany or Romania, you want to see the price before a demo call, and you need the bill rebuilt from 15-minute data and checked against the invoices.
Facts about the other tool read on 2026-10-28 from the pages linked in each cell. Prices and features change; check the vendor's page before you rely on one.
| Feature | Zorowatt | Energy Toolbase |
|---|---|---|
| Price | Free €0 · Starter €49 / month · Pro €149 / month · Enterprise on request | ETB Developer: no published price ("Request Pricing" after a demo call); until March 2026 the page listed Lite $170 and Standard $224 per user a month, billed annually. ETB Monitor from $4,700 (one meter, one-year subscription plus hardware); ETB Controller bundles "as low as" $12,400 / $34,000energytoolbase.com, web.archive.org · 2026-10-30 |
| Bill reconstruction | Rebuilt from the meter data under a versioned tariff and set against the real bill, component by component | Rate and incentive modelling; the incentives named are American (such as SGIP)energytoolbase.com · 2026-10-28 |
| Battery dispatch | Rule-based, with the optimal (LP) dispatch as the upper bound; every saving is billed by the same bill engine | Storage revenue streams modelledenergytoolbase.com · 2026-10-28 |
| Battery products | A database of commercial and industrial products, every spec with its source | Equipment configuration; ETB's own Controller and Monitor hardware sold separatelyenergytoolbase.com · 2026-10-28 |
| Battery operation | Planning only: no live battery control, no trading | ETB Controller and ETB Monitor hardware, plus consultingenergytoolbase.com · 2026-10-28 |
| Financials | NPV, IRR and payback, with degradation | Project economicsenergytoolbase.com · 2026-10-28 |
| Client report | PDF report for the client; white-label on Pro | Proposal generationenergytoolbase.com · 2026-10-28 |
In short
Energy Toolbase is built for US solar and storage developers, with proposals, incentives and its own hardware in one offer. Zorowatt does one part of that, the feasibility study, for European sites, and sells no hardware. If your projects are American, Energy Toolbase fits the market it was built for; if they are Dutch, German or Romanian, Zorowatt brings the tariffs with it.
Try it on your own file first
Both tools run in the browser with no account; the file is not uploaded.
Meter data checker
Gaps, duplicates, daylight saving time, kW vs kWh and coverage in a meter export, before the study starts. No account, nothing uploaded.
Peak-shaving battery calculator
Battery size and payback for cutting a site's peak charges — from four numbers or your own load profile. No account, nothing uploaded.
Looking for a Energy Toolbase alternative?
Zorowatt runs in the browser, reads the site's own meter data and rebuilds its bill before it sizes anything.
Switching?
Bring a site you already studied: upload its meter data and bills, and set the result next to your old one.