Installation manual

The PLT/TRG 100C turbine allows us to operate at a cable voltage of 100V with reduced

costs and reduced losses. It also allows us to use a 48V battery, popular with modern

systems. The downside is that the Klampit may operate too frequently if the controller allows

the voltage to rise above 120V. This would then have to be manually reset by stopping the

turbine. We can avoid this by careful choice of controller operating mode, such as:

 "PV trigger" or “Diversion: Solid state” function (in the Outback FM series controllers

see 5.11) or

 “Hydro mode: PWM Divert” function (in the Classic KID controller) or

 “Hydro mode: Twiddle Dither function (in the Midnite Classic 150-250 controllers) or

 PWM diversion controller fitted adjacent to the MPPT controller (in the case of the

Tristar TS/MPPT-60).

More details (with set up instructions for the above controllers) are covered in the 2014

Technical Manual.

5.7.9. Legal limits to voltage (extra low voltage)

For installations done by those who are not registered electricians, the maximum DC voltage

you are allowed to work at may be constrained by law. 120 V DC is the upper limit in

Australasia and some other parts of the world, and 75 V DC is also common globally.

You should check for local legislation that may prescribe a limit that applies to you. The

turbine rated voltage can be chosen so that it cannot exceed these limits, even in overspeed.

A crowbar voltage-clamp may be necessary to comply with legal constraints.

If the ELV (extra low voltage) limit in your country is 75 V DC or less, you are not a

registered electrician, and you do not wish to use a crowbar, then our PLT and TRG turbines

will be limited to 12 or 24 V DC battery charging, complying with the Law. 12 V DC systems

are not common these days with the majority of systems being 24 or 48 V DC. To charge a

48 V nominal battery at 56 V you would need to choose the PLT/TRG56C with voltage clamp

to prevent exceeding 75 V DC.