PowerSpout
React Pump Installation
© 2019 EcoInnovation Ltd (NZ) V2.1
Page 58
3.3. Operating your React pump from auxiliary (not solar) power sources
Systems with a 230/115 VAC supply
3.3.1.
It is possible to run the React pump off a 230 or 115VAC supply with a suitable power
supply.
For example a small 2kVA portable gen-set could be used to run the React pump
at night so the tank can be refilled at times of very high water demands. You may
need a COC for the VAC part of your system installation (as 230/115 VAC is "LV").
Seek advice from your electrician.
You will need an 80V 1kW power supply to do this. These you can buy online (for
example)
Example of a suitable power supply unit on the market:
Using the React pump solar array for other purposes
3.3.2.
Some farmers needing water over the back of their farm may also need a decent electric
fence, and power for communications and tools. The solar array powering the React pump
can often meet these needs as well. This is easy to arrange, so consider doing it at the
same time:
Skin the East/West truss mounted PV frame in plywood and/or corrugated steel and
make a watertight building.
Install a large 12V N200 truck battery in this building.
Note that your PV array will require over-current protection (circuit breaker) when
connected to a battery-based system due to the risk of high reverse fault currents.
Install a MPPT charge controller to charge the 12V battery. Program your controller
with the correct bulk, float & EQ settings for your battery. Maximum input voltage
limit of this controller should be at least 100VDC.
Fit a 12V electric fence energised for smaller farms
Fit a small AC sinewave inverter and mains powered electric energiser for
larger farms. Note: AC wiring work may need a COC and have to be done
by an electrician, so seek advice first.
The power needed to run an electric fence is low and will not significantly reduce the amount
of water pumped. On sunrise the MPPT controller will bulk charge the battery, and this may
delay starting of the React pump a little.