Jay Renewable Energy Private Limited
Miraj, Sangli, Maharashtra
GST No. 27AACCJ9584D1ZA
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| Cost of electricity | RS. 5.00 per unit (kWh) |
| Total heat gain kcal/ day | System capacity x Temp. difference |
| = 125 x 40 = 5000 kcal/day | |
| = 5000 x 4.2 kJ/ day = 21,000 kJ/day | |
| Total heat gain | = 21000/ 3600 kWh/ day |
| Saving in electricity | = 5.83 kWh / day |
| Saving in electricity cost | = Units saved x cost / unit |
| = 5.83 x 5 | |
| Saving / day | Rs. 29.15 |
| Saving per year | = 29.15 x 300 |
| = Rs. 8745 | |
| Payback period | = Total cost/ saving per year |
| = 25000/8745 | |
| Payback period | = 2.85years |
| Payback period with subsidy | 19000/8745 = 2.17 years |
Actual payback period becomes much shorter if the periodic rise in the cost of oil/ electricity, maintenance and handling charges for geysers or boilers and depreciation allowance available are accounted for.
With MNRE upfront subsidy under JNNSM, the cost of the system becomes Rs. 19000/- and payback period works out to 2.77 years and 2.17 years respectively.