Jan 5, 2026
Bright Sparks
Bright Sparks: Tim and CJ Lepper

We've seen electric cherries and electric chickens. How about electric piggies? CJ and Tim Lepper run a pig farm in Taranaki and, like a growing number of clever rural folk, they realised that solar was a slam dunk for their business.

Working with FarmGen, it installed a 1.8 megawatt system at a cost of around $1.5 million and CJ says that investment could be paid off in as little as five years.

Solar can slash bills for farmers overnight because it allows them to avoid high grid electricity costs but, with plenty of space for bigger systems, export revenue can also be significant. For them, selling a year’s worth of energy to the market at normal prices could bring in $200-250,000 each year.

It’s not just the solar that’s smart, either. The Leppers also have a system to turn the manure from 3,500 pigs into fertiliser and biogas. The biogas is sent to a 40kW generator that heats water to keep the piglets warm and Tim says it takes care of around 30% of the electricity bill.

While biogas can make sense on some farms because there’s an opportunity to turn waste into revenue, it is not a viable substitute for the gas network as there’s so little of it available and it’s more expensive than standard gas.

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