Spillwatt: Solar Monitor

Spillwatt shows what your solar panels produce and what your home uses, live, in seconds. We read your inverter and smart meter directly over your home network, so it works fast and without the manufacturer's cloud. LIVE AND LOCAL • Big numbers for solar, home and grid, refreshed every few seconds while you look • The energy flow in one clear picture, and today's balance • For every device you see whether it works, which route it uses and when the last reading was • This version only reads: it never changes settings on your inverter or meter WORKS WITH MANY BRANDS Spillwatt works with, among others, P1 readers from SOLARMAN and with ESPHome (such as the SlimmeLezer), Shelly, Enphase, Fronius, GoodWe, APsystems, and SunSpec inverters from SMA, SolarEdge and KOSTAL when Modbus is switched on. For each brand the app explains what you need to switch on first. YOUR DATA STAYS YOURS • Unlimited history on your phone, by day, week, month and year • Self-consumption in percent: the number that counts once net metering ends • Export to CSV, free, always THE END OF NET METERING In the Netherlands net metering ends on 1 January 2027. Spillwatt calculates what that means for you, on your own figures. PLUS Plus adds the watch tile and complication, advice with dynamic prices, notifications and more. What is free stays free. IF SOMETHING DOES NOT WORK Tap "Report a problem". We receive a short technical report: brand, model, firmware, the step that failed and the error code. Serial numbers, tokens, passwords and network names never leave your phone. Spillwatt is not affiliated with SOLARMAN, Zuidwijk, ESPHome, Shelly, Enphase, Fronius, GoodWe, APsystems, SMA, SolarEdge or KOSTAL. Brand names are used only to describe compatibility. Requires Android 8.0 or newer. The watch app needs Wear OS 3 or newer and works together with the phone app.

New: read your smart meter with a SOLARMAN P1 reader (P1-2W) or a P1 reader with ESPHome, such as the SlimmeLezer. The app tells you per reader what to switch on first. The connection for HomeWizard meters has been removed. Plus small improvements under the hood. Something off? Please use "Report a problem" in the app.