The minimum system circuit of 51 MCU is a single-chip microcomputer system with address extension, including external 32k RAM expansion, LCD1602 interface, input and output port. Use 74HC573 to latch the lower 8-bit address; 74138 to achieve 8 address expansion, 74138 A, B, C are connected to A8 ~ A10, E1 is connected to A15, E2, E3 is always valid, get 0F8FFH to 0FFFFH8 addresses (don't care bit 1 Indicates) or 8000H to 8700H (don't care bits are represented by 0). 51 single-chip minimum system circuit:

Saintish all in one off grid inverter comes with two output modes: mains bypass and inverter output to achieve uninterrupted power supply function. and the solar off grid inverters are available in 4 charging modes: Only Solar, Mains Priority, Solar Priority and Mains & Solar hybrid charging.
It adopts full digital voltage/current double closed-loop control and advanced SPWM technology to achieve output pure sine wave. Our solar inverter equips advanced MPPT technology, with efficiency up to 99.9% and wide MPPT voltage range.
There is function of activating lithium battery with solar energy and AC mains power, it also supports connection of lead-acid battery and lithium battery.
The LCD screen designed and 3 LED indicator lights dynamically display system data andoperation states.
ON/OFF rocker switch can control AC output.
With power saving mode function, it can reduce no-load loss.
All In One Inverter, All In One Off Grid Inverter, Hybrid Inverter, Off Grid Energy Storage
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