Solution

DG–Solar Synchronisation

Run solar together with your diesel generator, safely. Protect the DG from reverse power and save diesel.

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The problem

When the grid fails, the diesel generator (DG) starts and your solar inverters keep running on the DG supply. If solar makes more power than the load needs, the extra power flows back into the DG. A DG cannot take reverse power: it can trip, run unstable or get damaged. Running a DG at very low load is also bad for it.

Many sites simply switch solar off whenever the DG runs. That is safe, but you lose all the free solar energy during power cuts, and burn more diesel.

How it works

A meter on the DG side measures the DG power.
The controller detects when the DG is running.
It limits solar so the DG always carries a safe minimum load.
As the load changes, the solar limit follows it, all the time.
When the grid returns, solar goes back to full output.
DG and solar data go to the Solar Portal.

What you get

No reverse power into the DG
Less diesel burnt, because solar shares the load
The DG runs at a healthy load
No need to switch solar off when the DG runs
Automatic: nobody has to watch the panel
Control runs at site, even when the internet is down

Before the first DG run

During commissioning we check that every inverter accepts and follows the limit command. For the first DG run after setup, keep someone at the DG panel and make sure real load is switched on before solar reconnects. This simple check protects your DG.

What we need from you

DG rating in kVA, and how many DGs the site has
Inverter make, model and kW
Whether a meter with RS485 output is already fitted at the DG panel

DG–Solar Sync: run solar safely with your generator

When the grid is down and the DG runs, the DG-sync controller limits solar so the generator always keeps a safe minimum load: no reverse power, less diesel, full solar again when the grid returns. Hindi voice.