Pure Sine Wave Inverter For Wind Solar System 1000W 48V,Output Frequency 50Hz/60Hz,Maximum efficiency >90%,Power factor >99% ... .Output short circuit protection (when the inverter is working on battery mode): when there is short circuit, the inverter will indicate ... down at once.6.Internal circuit can protect the battery .when the battery voltage is under the 15% level,the inverter will ...