Stop Octopus daytime EV charging from draining your home battery
This is the flagship 1app.energy wedge: stop the daytime EV-battery conflict first, then layer in cheaper-period battery charging and broader whole-home coordination.
Octopus starts the charge.
Your battery quietly pays for it.
In the daytime, a smart EV session can pull stored battery energy straight into the car. The charger app, battery app, and tariff app all do their own job, but none of them protect the energy you wanted to keep for later.
Octopus starts the car. Your battery pays.
Octopus smart charging kicks in during the daytime. Your solar inverter battery dumps stored energy into the EV. Neither app stops it.
4 apps, zero clarity
You still bounce between solar, battery, EV, and heat-pump apps just to work out what the home is doing.
You keep changing settings by hand
To avoid daytime drain and still catch cheaper periods, you end up babysitting battery modes and schedules manually.
Invisible efficiency drops
Your heat pump's performance quietly degrades over weeks. The manufacturer app never flags it — you only notice the bigger bill.
Why people start looking for a fix
Across mixed-device homes, poor coordination can quietly waste £200–£400 per year before the bill tells you why.
Private beta rollout
This use case already exists in real homes, even if rollout is still selective.
The product foundation is built around conflicts like this one. Public onboarding is being paced carefully, so the next step is to review your exact device and tariff mix.
Best-fit homes are invited first
Homes where multiple devices already interact are reviewed first — rollout is selective and supported.
Combination creates the value
Whole-home value comes from how devices work together, not from any single device in isolation.
Setup review comes first
Tell us what is installed so we can review the safest and most effective rollout path for your specific configuration.
Best fit
For solar inverter + battery homes on Octopus smart charging where daytime EV sessions can pull stored energy out of the home battery at the wrong time.
Friction today
- Octopus smart charging can start the car in daytime windows the inverter and battery app do not understand.
- The home battery can discharge into the EV instead of protecting the house or waiting for evening use.
- Homeowners end up changing battery modes manually or discovering the problem after the bill arrives.
What improves
- Detect when a smart-charge session overlaps with battery discharge risk.
- Hold or protect the battery automatically during the EV session based on the configured rule.
- Layer in cheaper-period battery charging and whole-home cost visibility so users can see more value after the core fix.
Typical workflow
- 1
Connect Octopus tariff context, EV charger context and the inverter or battery data.
- 2
Detect when daytime EV charging would pull from the home battery.
- 3
Apply the chosen battery protection rule, then review the wider battery timing and whole-home cost outcome.
Related integrations
These device and tariff pages are the fastest route from the use case into product-specific details.
Solis
Connect Solis hybrid inverters to 1app.energy to see live solar, battery, grid and home demand in one place, then automate battery charge decisions around tariff windows.
Enphase
Connect Enphase systems to bring microinverter solar data into the same decision layer as tariffs, batteries, EV charging and heating demand.
myenergi Zappi
Connect your myenergi Zappi charger to see EV charging in context with solar, battery and tariff data instead of guessing whether the car is stealing the cheap window.
Octopus Energy
Connect Octopus tariffs to turn raw device telemetry into cost-aware actions, daily savings reporting and smarter battery decisions.
Related tariff guides
These tariff pages explain the pricing context that usually drives this use case.
Octopus Agile automation
Octopus Agile changes import price every half hour. The real question for battery, EV and heat-pump homes is whether the house can respond to those price signals without creating new conflicts.
Octopus Go battery and EV optimisation
Octopus Go is simpler than Agile on paper, but homes still need to know whether the fixed off-peak window is serving the car, the battery and the house in the right order.
Octopus Intelligent Go coordination
Octopus Intelligent Go creates EV-led charging windows, but battery logic, charger behaviour and whole-home demand still need to be interpreted together.
Smart controls that usually fit this problem
These mode pages explain what battery strategy tends to work best once this use case shows up in a real home.
Home First
A simpler home-first mode. It prioritises running the home from your own solar and battery first, minimises grid dependence, and avoids optimiser-led battery export.
Autopilot
The best starting mode for most homes. Autopilot decides when to charge, hold, or export by balancing tariff value, home coverage, refill confidence, and your protected minimum battery SoC. Choose Balanced for a calmer default or Aggressive for stronger value seeking.
Manual Control
A support-style page for advanced users. Manual Control keeps the automation framework in place but follows your fixed current choices more directly, with safety caps and backend guardrails still applied.
Priority access
Request a review for Octopus + solar battery + EV
Tell us your inverter, charger and Octopus tariff so we can review whether the current rollout can protect your battery during smart charging.
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