Battery ETA: Home Backup

Find out if your Marstek battery will last until the end of the outage. BEFORE YOU BUY • We support only Marstek Venus E 3.0 with firmware V150 or newer, on iPhone or iPad. • You must be on the same Wi‑Fi as the battery for the app to work correctly. All limits: https://lapin7771n.github.io/marstek_analytics/support/#limits Battery ETA reads your Marstek Venus E 3.0 over your home Wi‑Fi and turns the numbers into one answer: the time left at the current load. While the battery charges, it shows the time until full. TIME LEFT • EMPTY IN: time until the battery reaches your reserve • FULL IN: time until it is fully charged • IF OUTAGE: how long the battery would last if the grid went down now • Charge in percent and power in watts POWER BACK AT • Add your Kyiv address and get a plain answer from the YASNO schedule: "Lasts until 18:00, 1 h 20 min to spare" or "Runs out at 16:40, 40 min short" • If it falls short, the app tells you how many watts to cut WIDGETS • Home Screen: charge ring, or charge with time left • Lock Screen: round gauge or a line with time left • See the numbers during an outage without opening the app DURING AN OUTAGE • Live Activity: the charge and the run-out time on the Lock Screen and in the Dynamic Island TODAY AND WEEK • A chart of today's charge and hourly power • Energy charged and used, and time on battery • The same totals over the last 7 days ALERTS • A warning 30 minutes before a scheduled YASNO outage if the battery won't last (addresses in Kyiv) • A notification when less than 30 minutes are left, and when the battery reaches the reserve SET UP IN A MINUTE • Turn on Local API in the Marstek app • Tap Find battery, and the app finds it on your Wi‑Fi • No account and no sign-in PRIVACY Battery ETA only reads the battery status and never changes a battery setting. Readings stay on your device. No ads, no analytics, no tracking. Battery ETA is an independent app. It is not made by, endorsed by or affiliated with Marstek.