Many Malaysian homes now have solar atap: rooftop solar panels connected to the TNB grid. A common surprise is what happens in a TNB blackout. The panels sit in full sun, and the house is still dark.

With the government strengthening protection for the energy sector after its 3 November warning about cyber threats, it is worth understanding why that happens, and what changes it.

Why grid-tied solar switches off in a blackout

A standard grid-tied solar inverter is designed to shut down when the grid fails. That is a safety requirement, not a fault: it stops your panels feeding electricity into lines that TNB crews may be repairing. The result is that, without a battery, rooftop solar cannot power your home during a power outage, however sunny the day.

What a home battery changes

A home battery stores your solar energy, and one with backup built in keeps the house supplied when the grid goes down. OCEAN 2 Plus has integrated backup, with no additional gateway needed: when TNB power is lost, the circuits on its backup output keep running from the battery, and the solar array keeps charging it through the day.

• Three MPPTs on both OCEAN 2 models, for up to 24kW of solar, so roofs facing different directions can each be tracked.
• Designed and quoted for each home, on your roof, your switchboard and your loads.
• A 10-year warranty in Malaysia on the system.

Three-phase homes have OCEAN 2 Three-Phase and PowerOcean Plus. Already have rooftop solar? In many cases a battery can be added to it; see adding a battery to existing solar.

It also works on an ordinary day

Outside an outage, a home battery is an energy storage system that moves midday solar into the evening, when you would otherwise draw from the grid. If you are on TNB's domestic Time of Use tariff, peak hours are 14:00 to 22:00 on weekdays (as at November 2026), so storing solar for those hours is where a battery earns its keep.

Fixed panels or portable panels?

A rigid panel sits between the two. The 400W Rigid Solar Panel set (2 pieces) has an aluminium frame and IP68 glass for a fixed mount, on a porch roof for example, feeding a DELTA Pro 3, which takes up to 2,600W of solar input. DELTA Pro 3 expands to 48kWh and DELTA Pro Ultra to 90kWh, which makes either a whole-home backup with no installation work.

Questions to answer before you get a quote

• Which circuits do you want kept on in an outage?
• Is your supply single-phase or three-phase? Your TNB bill or switchboard will tell you.
• How much electricity do you use in a month? The kWh figure is on your bill.
• Which way does your roof face, and is it shaded?
• Do you already have solar panels and an inverter?

Try the home backup sizer for a first estimate, or read about OCEAN 2 Plus Single-Phase.

How EcoFlow Malaysia can help

We sell and support EcoFlow in Malaysia, and our part in this is practical: helping households and businesses choose the right backup before they need it, not after.

• Free sizing on WhatsApp. Tell us what you want to keep running and for how long, and we will suggest a setup: +60 11-3772 7100.
• Size a whole-home system yourself with the home backup sizer.
• See the units in person at our showroom: B0103, Blok B, Eko Galleria, Iskandar Puteri, Johor (Monday to Thursday and Sunday 11:00 to 20:00; Friday and Saturday 11:00 to 21:00).
• Warranty and after-sales in Malaysia on every unit bought from the official channel.
• 0% instalments for up to 24 months on selected credit cards.