效果

实现

在每个series中添加不同的
tooltip: {
valueFormatter: function (value) {
return value.toFixed(0) + ‘A’;
}
},

代码如下

var option = {
  // grid: {
  //           left: '-13vw',//左边距72px
  //           right: '32%',
  //           bottom: '64%',
  //           top: '16%',
  //           containLabel: false
  //         },
  backgroundColor: "white",
  title: [{
      text: '.',

      x: 15,
      y: '20',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 20,
          fontWeight: '500',
          color:"transparent",
      }
  }, {
      text: '.',
      x: "11",
      y: '5',
      textBaseline: 'middle',
      textStyle: {
          color:'#cccccc',
          fontSize: 16,
          fontWeight: '100'
      }
  }, {
      text: '最新',
      x2: 235,
      y: '10',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: '最小',
      x2: 165,
      y: '10',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: '最大',
      x2: 95,
      y: '10',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: '平均',
      x2: 20,
      y: '10',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: in_new,
      x2: 235,
      y: '26',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: in_min,
      x2: 165,
      y: '26',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: in_max,
      x2: 95,
      y: '25',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: in_avg,
      x2: 20,
      y: '25',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: out_new,
      x2: 235,
      y: '40',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: out_min,
      x2: 165,
      y: '40',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {
      text: out_max,
      x2: 95,
      y: '40',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }, {

      text: out_avg,
      x2: 20,
      y: '40',
      textBaseline: 'middle',
      textStyle: {
          fontSize: 12,
          fontWeight: '100'
      }
  }],
  legend: [{
      x2: 300,
      y: 20,
      icon: 'rect',
      itemGap: 3,
      itemWidth: 11,
      itemHeight: 11,
      orient: 'vertical',
      data: ['接收', '发送']
  }],
  grid: [{
      left: 20,
      right: 20,
      top: 80,
      bottom: 20,
      containLabel: true
  }],
  
  dataZoom: {
      type: 'inside',
      filterMode: 'filter',
      orient: 'horizontal',
      xAxisIndex: [0],
  },
  tooltip: {
      trigger: 'axis',
      axisPointer: {
          lineStyle: {
              color: '#57617B'
          }
      },

      
      // formatter: function (params) {
      //         //文字加单位
      //         var relVal = params[0].name;
      //         for (var i = 0, l = params.length; i < l; i++) {
      //           relVal +=
      //             "<br/>" +
      //             params[i].marker +
      //             params[i].seriesName +
      //             " : " +
      //             params[i].value +
      //             "%";
      //         }
      //         return relVal;
      //       },

  },
  xAxis: [{
      type: 'category',
      boundaryGap: false,
      axisLine: {
          lineStyle: {
              color: '#57617B'
          }
      },
      data: date
  }],
  yAxis: {
      type: 'value',
      axisTick: {
          show: false
      },
      axisLine: {
          lineStyle: {
              color: '#57617B'
          }
      },
      axisLabel: {
          formatter: '{value}',
          textStyle: {
              fontSize: 12
          }
      },
      splitLine: {
          lineStyle: {
              color: '#cccccc'
          }
      },
      
  },
  series: [{
      name: '电流',
      type: 'line',
      showSymbol: false,
      tooltip: {
          valueFormatter: function (value) {
            return value.toFixed(0) + 'A';
          }
        },
      lineStyle: {
          normal: {
              width: 0
          }
      },
      itemStyle: {
          normal: {
              color: 'rgba(0,0,255)'
          }
      },
      areaStyle: {
          normal: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                  offset: 0,
                  color: 'rgba(0,0,255, 1)'
              }, {
                  offset: 0.8,
                  color: 'rgba(0,0,255, 0.5)'
              }])
          },
      },
      data: cur
  }, {
   
      name: '电压',
      tooltip: {
          valueFormatter: function (value) {
            return value.toFixed(0) + 'V';
          }
        },
      type: 'line',
      showSymbol: false,
      lineStyle: {
          normal: {
              width: 0
          }
      },
      itemStyle: {
          normal: {
              color: 'rgba(0,255,0)'
          }
      },
      areaStyle: {
          normal: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                  offset: 0,
                  color: 'rgba(0,255,0,1)'
              }, {
                  offset: 0.8,
                  color: 'rgba(0,255,0, 0.5)'
              }])
          },
      },
      data: vol
  },
  {
      name: '电容',
      type: 'line',
      tooltip: {
          valueFormatter: function (value) {
            return value.toFixed(0) + 'Kwh';
          }
        },
      showSymbol: true,
      lineStyle: {
          normal: {
              width: 2
          }
      },
      itemStyle: {
          normal: {
              color: 'black'
          }
      },
      
      data: cap
  },
]
};