Tab. 8: Variable costs of electricity in relation to yield

The energy costs per kWh for distribution after subsides are around 0.7-0.8 ISK/kWh for „VA210“ and „VA230“, around 0.6 ISK/kWh for „VA410“ and around 0.4-0.5 ISK/kWh for „VA430“. The energy costs for sale are for „afltaxti“ around 4.5 ISK/kWh and for „þrígjaldstaxti TT“ and „þrígjaldstaxti TV“ around 5-6 ISK/kWh.

Cost of electricity was higher for the calculated values (Tab. 7). In general, tariffs for large users rendered lower cost.

4.5.3 Costs of electricity in relation to yield

Costs of electricity in relation to yield for wintergrown tomatoes were calculated (Tab. 8).

Tab. 8: Variable costs of electricity in relation to yield.

Variable costs of electricity per kg yield

ISK/kg

Treatment 300 HPS, ungrafted 300 HPS, grafted 240 HPS, peat 240 HPS, pumice 240 HPS, scale

240 HPS, tending Yield/m2 47.0 43.5 43.3 42.6 45.3 46.1

real calculated real calculated real calculated real calculated real calculated real calculated

Urban area (Distribution + Sale)

VA210 142 143 151 157 153 154 163 169

VA410 137 138 146 152 149 149 158 164

Rural area (Distribution + Sale)

VA230 139 140 149 154 150 152 161 167

VA430 133 134 142 147 143 145 153 159 123 124 131 136 119 120 127 132

121 122 129 134 115 116 123 128 125 126 133 138 121 122 129 134 117 118 125 130 114 115 121 126 116 116 123 128 112 113 120 124

123 124 131 136 117 118 125 130 115 116 123 128 110 111 118 122 114 114 121 126 108 109 116 120

While for the distribution several tariffs were possible, for the sale only the cheapest tariff was considered. The costs of electricity decreased at the lower light intensity and with a higher yield and were about 5 % lower for the treatment “240 HPS, scale”