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Author Topic: 'High' voltage off grid inverter?  (Read 1584 times)
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« on: July 10, 2009, 08:19:36 AM »

My grid tie inverter runs best at 200 - 300 V DC input. So I have built my generator around this.

When I get a power cut, I am thinking that I could switch over to an off grid inverter, cut myself off the mains, and run a few basic bits and bobs (freezers mainly..) direct from the off grid inverter, and dump the excess as heat / hot water etc etc.

All simple enough - but I can't seem to see any inverters that take anything greater than 48V if they are off-grid - or am I being stupid?

Pic of wheel on day 1
7.2kW Waterwheel and 9.8kW PV
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« Reply #1 on: July 10, 2009, 08:57:19 AM »

You're confusing off-grid inverter/chargers with charge controllers.  Typical off-grid systems have the PV panels connected to a DC charge controller (like the outback MX60, FM60 or FM80), this then connects to the batteries.  The inverter/charger then connects the batteries to your AC loads.  The highest PV panel voltages supported by charge controllers is 140V by the outbacks and 200V by the Apollo Solar T80. 

Similar situation discussed here:,6834.0.html

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