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Guides for WeCo battery owners
What we have learned reading these systems day after day, written down for owners and installers. No sales pitch, just the things worth knowing.
WeCo LV cluster: why watch each module, not just the total
Why the modules of a WeCo cluster drift apart, what a weak module does to the whole battery, and what to look for in the data.
- In parallel, modules share the current according to their resistance and their state; small differences are normal.
- A module that ends every evening lower, or runs warmer, limits the whole cluster sooner or later.
- The trend over weeks matters more than any single reading.
Low-voltage clusters and high-voltage stacks with WeCo modules: how they differ, how to tell which one you have, and what it means for monitoring.
Read the guide → 3 min readWeCo battery state of health: what it means and why to record itWhat the state of health of a WeCo module really measures, how it moves over the years, and how a record helps with the warranty.
Read the guide →Try it, click, copy
Interactive pages that answer questions faster than a long article.
Your appliances run on the sun, by themselves
WeCo Monitor tells Home Assistant when the battery fills up and when it runs low. Four simple rules, and the washing machine, the water heater and the car use your sun instead of the grid. Watch a day:
Your solar production
Your consumption
Automations
- Washing machine on the sun
- The car follows the sun
- Hot water for free
- Gentle evening heating
Logbook
- Solar production
- House and heating
- Washing machine
- Water heater
- Electric car
- Battery level
- From the grid
- Sold to the grid for little
Simulation of a sunny day for a house with 5 kWp of panels, a 10 kWh battery, a car that needs 10 kWh and a water heater. The energy delivered to each appliance is the same in both scenarios; only the timing changes. Your figures depend on your system, your tariff and the weather.
A quick question?
The FAQ answers most of them, with a search box.
Keep reading
Every WeCo module, in one view
Pre-order now. The box is tested on WeCo modules before it ships on 10 November 2026.
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