There are a number of off-grid inverter/systems you should consider depending on your requirements, budget, support, compliance and warranty needs. For our guide on how to build a powershed click here.
If you are after a stand alone inverter above 3kW please contact us as we can source many brands available in NZ.
One often overlooked cost of an installation is the installer/electrician's time. It is worth considering a pre-wired solution as it will normally have a lower overall cost. We have detailed some of the pre-wired solutions available below:
Premium prewired and 5-year warranty
Outback FP1, FP2, FP3, FP4 – USA design made in India (highest cost)
Victron EasySolar 5kW – European design made in Malaysia (medium cost)
This is a Steca branded 5kW product (likely made in China). There is no doubt that Steca have added some features and are selling a quality product that is compliant with accepted international standards.
Chinese direct economy 5kW 1-year warranty in China (very low cost)
We do not sell these Chinese units but they are becoming popular with financially constrained clients. We have tested some, and some have worked very well, some have not. Many sell in range $350-450US + freight. Freight accounts for about 1/3 of the cost, as any warranty offered (normally 1-year) is return to base in China at buyers expense both ways, the warranty is in effect worthless, so you may want to consider the Steca Solarix PLI5000-48 from a distributor in your own country. Yes is will cost more than Chinese direct equivalent but you will have a warranty that is worth something, you may even get some free support from a local agent.
This is a case of buyer beware. For financially constrained DIY clients globally these could be a very good solution, but we cannot help you if you have an issue. We cannot sell you one as not all compliance certificates from China are genuine and product variations change constantly which makes retailing them in the small NZ market not practical. Most clients who want one are already buying them online at the lowest possible cost so the remaining market is minuscule. We spend many hours every month talking to clients who are interested in these low cost inverters. We do not sell them. We can help if you are in the market for a quality 5-year warranty (NZ supported) inverter or pre-wired system.