Switching off inverters.

Switching off inverters.

Is it meaningful to switch off inverters at any time, is it possible and what is the use?

Switching off inverters could be meaningful, for example at night, no power is used, so why leave the inverter running and use precious solar power? The so called no-load current can be anywhere from 0.5 upto 2-Amps, and at 48-Volts this is quite a bit of power.

On the downside, some stuff might always need power, like your fridge, freezer, kids lights or alarm clock. All motivations to leave the inverter running.

Seeing reasons for both letting the inverter run and switch it off at the same time, it could be wise to have multiple inverters in your system. A dedicated always-on and a larger whole house, switch off inverter.

Switch off methods

  • Switch off automaticly if it’s without use, but only very few manufactors offer this option.
  • Switch off by cable remote, some manufactors have this for their inverters.
  • Switch off by wireless remote. Is either available or you have to install it yourself.
  • Switch off by programmable timer, which is usually done by owner.

Auto off:

Very few manufactors offer this option, it seems decent, no usage switch off and as soon as a new demand for power is started, the inverters powers back on.


Cable remote:

A cable remote is usually an accessoiry connected to the inverter with a UTP-cable and has a limited distance to overcome.

Tracer has their MT50 Remote for setting parameters but you can also switch the load on and off.
Tracer has their MT50 Remote for setting parameters but you can also switch the load on and off.

Wireless remote:

A wireless remote, we have no list of manufacturs who offer this option, but it is very easy to gather a remote in many forms.

Universal one channel on-off remote.
Universal one channel on-off remote.
Universal 4-channel remote operated by cellphone.
Universal 4-channel remote operated by cellphone.

Timer remote:

A timer remote is not really a remote, but a programmable week-timer with fixed on-off hours with manual override.

Programmable daily/weekly timer, now unless your manufactorer has a nice solid solution, this option would have our preference.
Programmable daily/weekly timer, now unless your manufactorer has a nice solid solution, this option would have our preference.

Downside.

The last two options, no matter how universal have a large downside. Most of the time the inverter needs to opened-up and modify the existing inverter on-off switch. It is hardly an option to switch on the DC-side and cut that power. The easiest option is to just remove the on-off switch and connect a relay for either wireless or timer remotes.

Most inverters have a switch on the outlet-side.

Most inverters have a switch on the outlet-side.
Most inverters have a switch on the outlet-side.

If you’re not comfortable to alter the on-off switch, either for warranty reasons or just since electricity isn’t your strong point, please contact a professional or let it be !