Stop paying to export
during negative pricing

PowerSync automates solar curtailment for Tesla Powerwall when wholesale prices go negative — protecting your bill while keeping SmartShift charging intact.

Two products. Pick the one that fits how you run your home.

Cloud App · Tesla only

PowerSync Cloud

$4.99/month · Tesla Powerwall · Amber, Globird, Energy Locals

Block exports during negative pricing
Maximise exports during AEMO wholesale spikes
Real-time Tesla + Amber dashboard on web & mobile
NEM 5-min boundary aligned, anti-thrashing built in
Off-grid mode (optional, with Powerwall pairing)
No Home Assistant required

See how it works

Home Assistant Integration

PowerSync for HA

Free & open source · supports any battery brand

Tesla, FoxESS, Sigenergy, GoodWe, Sungrow + more
Full LP optimiser (HiGHS solver, 48h horizon)
EV charging, AEMO spike export, Storm Watch
Works with Amber, Octopus, Flow Power, GloBird
Auto-built Lovelace dashboard

Install via HACS

See features

PowerSync Cloud — for Tesla Powerwall

Two automations on one battery: block exports during negative pricing (Amber), and maximise exports when wholesale prices spike (any retailer with wholesale passthrough — Globird, Energy Locals, Amber). Sign in with Tesla, pick your retailer, the cloud handles the rest.

Automated

Negative pricing? Not your problem.

The cloud polls Amber every 5 minutes, aligned to the NEM dispatch boundary. When export prices go negative, PowerSync blocks export so you stop paying the grid to take your solar.

NEM 5-minute aligned polling
Anti-thrashing: 3-min minimum interval, daily transition cap
2-check hysteresis prevents flapping at boundary
Watchdog auto-restores if anything goes sideways

Apps

Live dashboard, anywhere.

Tesla Powerwall and Amber pricing on one screen. Curtailment status with manual override controls. Action history with reasons. Web and native mobile, both included.

iOS & Android native app
Web dashboard at powersync.cc/app/
15-second live updates of Tesla state
Manual curtail/restore with override cooldown

90%

Battery SOC

Spike Export

Cash in when wholesale spikes.

When the AEMO wholesale price for your NEM region exceeds your threshold (default $3000/MWh = $3.00/kWh), PowerSync uploads a synthetic high-sell-rate tariff to your Powerwall — switching it to autonomous mode and aggressively exporting through the spike. When prices normalise, your original tariff is restored automatically.

Works with any wholesale-passthrough plan — Globird Zerohero, Energy Locals, Amber, Powershop
Polls AEMO once per minute, all five NEM regions (NSW1, QLD1, VIC1, SA1, TAS1)
2-tick hysteresis prevents flapping at the threshold boundary
Saved tariff checkpointed before any change — a cloud crash mid-spike can't orphan your Powerwall
Coexists with negative-price curtailment — spike automation takes priority when both apply

How it works

STEP 01

Sign in with Tesla

OAuth handled by Tesla — your password never touches us.

STEP 02

Pick your retailer

Amber unlocks both automations. Globird, Energy Locals, or other wholesale-passthrough plans get AEMO spike export.

STEP 03

Set your thresholds

Negative-price threshold (Amber only) plus AEMO spike threshold ($/MWh). Tweak both to taste.

STEP 04

You're done

PowerSync handles the rest — 24/7, in the cloud, even if your phone is off.

Cloud or Home Assistant?

Both products use the same Tesla OAuth and the same battle-tested curtailment logic. They differ in scope.

	Cloud	Home Assistant
Price	$4.99/mo	Free
Tesla Powerwall curtailment	✓	✓
Amber Electric integration	✓	✓
Mobile app + web dashboard	✓	✓ (via app)
Off-grid curtailment	✓	✓
Hands-off — no install required	✓	Needs HA
Other batteries (FoxESS, Sigenergy, Sungrow…)	—	✓
EV smart charging (Tesla, OCPP, Zaptec…)	—	✓
LP optimiser (48h cost-min schedule)	—	✓
AC-coupled inverter curtailment	—	✓
AEMO spike export	✓	✓
VPP enrollment + Storm Watch	—	✓

Already running Home Assistant? Stick with the integration — it's free and more capable.
Don't want to run a server? The cloud app is for you.

Home Assistant Integration

The full toolkit. Free.
And open source.

The original PowerSync — a complete Home Assistant integration with linear-programming optimisation, EV smart charging, AEMO spike export, and a free Tesla sign-in proxy. Works with most major battery brands and electricity providers across AU, NZ, UK and EU.

Install via HACS Free Tesla sign-in

The Tesla sign-in proxy is for HA users — it shows your token to copy into the integration.

PowerSync mobile app — live energy flow dashboard

Works with your battery

🧠

LP Optimiser

HiGHS-solver-backed engine plans the cost-minimising charge/discharge schedule 48h ahead.

🚗

EV Smart Charging

Tesla, OCPP, Zaptec, generic — coordinate vehicle charging during the cheapest periods.

⚡

AEMO Spike Export

Detect wholesale price spikes and force-export battery to maximise revenue. Amber, AEMO VPP, Flow Power, GloBird.

☀️

Solar Curtailment

Reduce inverter output with load-following logic across every supported brand on negative pricing.

⛈️

Tesla Storm Watch

Enable, disable, or automate Tesla's predictive pre-charging before severe weather.

📡

Tesla VPP Enrollment

Enroll or unenroll in Tesla's virtual power plant programs from HA or the mobile app.

🔌

Off-Grid Curtailment

RSA-paired Powerwall control to physically open the grid contactor when nothing else will do.

📊

Auto Lovelace Dashboard

Power flow, price charts, controls, TOU schedule — built for you on first setup.

🔋

Battery Health Scans

Local TEDAPI scan of Powerwall BMS for true degradation tracking.

Install in minutes

Add Repository

Open HACS in Home Assistant, click the menu, and select Custom repositories. Add the repo URL as an Integration.

Bolagnaise/PowerSync

Install

Search for PowerSync in HACS, click Download, and restart Home Assistant.

Configure

Go to Settings → Integrations → Add Integration, search for PowerSync, pick your Tesla API path, and follow the wizard.

Supported by the HA integration

The cloud app supports Tesla Powerwall on Amber, Globird Zerohero, Energy Locals, and other wholesale-passthrough plans. The HA integration covers far more battery brands and retailers.

Battery Inverters

Tesla Powerwall 2 & 3 FoxESS Sigenergy GoodWe Sungrow SH

AC-Coupled Inverters

Fronius Enphase Huawei Zeversolar Sungrow SG GoodWe

Electricity Providers

Amber Electric Octopus Energy EPEX Day-Ahead AEMO VPP Flow Power GloBird Energy Localvolts NZ TOU

EV Chargers

Tesla Fleet API Tesla BLE (ESPHome) Teslemetry OCPP Zaptec Generic (switch + amps)

Stop paying to exportduring negative pricing