Solar and Dynamic Load Balancing (DLB)

Dynamic load balancing lets your charger react to what the rest of your house is doing, and on some units it can also charge from surplus solar. It is fitted as standard on every Volt Éire installation — this guide explains what it does and how the solar side works.

Do I have a DLB?

Look for a small DIN-rail box near your fuseboard with current clamps around your main tails. Every Volt Éire installation now includes load balancing as standard, so if yours was fitted before that changed and you cannot find one, email ev@volteire.ie and we will check your job record.

The four DLB modes

Normal mode: When to use it: No solar — just a busy household.; Caps the total current the home draws so you don’t trip the main fuse when the EV charges at the same time as the immersion or shower.
Pure PV mode: When to use it: You have solar and want to charge only on excess.; Only charges from surplus solar. If the panels aren’t producing enough, the charger pauses (down to 6 A minimum).
Hybrid mode: When to use it: You have solar but want to top up from grid as well.; Uses available solar plus a grid allowance you set. Caps the total so you stay below your main supply.
Full-speed mode: When to use it: You want to ignore solar/limits and charge as fast as possible.; No limiting. The charger draws its full configured current regardless of what the rest of the house is doing.
Night Full-speed (PV mode add-on): When to use it: You have solar but want fast night-time charging.; In PV mode, automatically switches to full-speed between 20:00 and 06:00 — useful when there’s no sun anyway.

Choose a mode in the app

Open Z-BOX → your charger.
Tap the DLB tab in the bottom nav.
Tap Dynamic Load Balance → toggle on.
Pick the mode that matches your situation (table above).
Set the Max grid current to whatever cap your house can safely use (e.g. 40 A on a 12 kVA supply).
Save.

If you're unsure what to set, leave it on Normal mode with the cap at your main fuse rating. That's the safest default.