It is possible to go off-grid on a budget – Latest Aquion Battery Case Study

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Customer Comment:

“I am so happy with the Aquion Battery system, it is the neatest, most compact, lowest maintenance array I have owned, and I have been using solar off-grid for about 8 years now. The batteries are hidden away in an underground wing of my house – no venting required!!”

L.B. 6/7/2015
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The Story in Brief:

This innovative, entirely off-grid home is literally built into a hill.

Power is generated by solar panels and then stored in 4 Aquion S20 batteries providing the home with a total of 9.4 KWh of storage.

The system is an extremely elegant an uncomplicated design.  The home is an average size 4 bedroom home. 


The Details:

Equipment used:


4 S-Stacks for a total of 9.4 KWh

Solar System:

9 – 250 watt solar panels in 3 strings of three, each three in series and then all 3 strings parallel into the regulator.


Outback 48 volt 3kw inverter, plus an Outback FM-80 Regulator.  The inverter was re-configured from default settings to 36 volts Low Battery Cut Off and 45 volts Battery cut in point.

System Design:

The system has no large isolating switch as are typically used on high amperage battery systems, but instead, 8x (2×4) simple 20 amp Clipsal circuit MCB4-120 breakers (4.5 kA) wired together and interconnected (breakers are DC compatible).  There is a backup generator with a 30 amp breaker.

Other energy savings measures:

All cooking and water boiling in the house is done with gas. There are 2 large LPG gas bottles.  One bottle lasts more than a year, and costs $120.  the hot water is from 20 evacuated tubes on the roof and stored in an off peak type tank in the house, no electrical or gas back up. Cold water is from a tank up the hill, gravity fed, creating close to domestic pressure, rain run-off from large shed.