Solar Water Heater Capacity Guide — 100, 150, 200, 300 & 500 LPD
- Arun Hitech
- Jun 7
- 2 min read
Solar Water Heater Capacity Guide — Which Size Do You Need?
Quick Answer: Allow 20-25 litres of hot water per person daily. A family of 4 needs 100-150 LPD (₹23,500-₹33,000); 8 people need 200 LPD; hostels need 500 LPD or more.
Choosing the right capacity is the most important decision when buying a solar water heater. Too small and you run out of hot water; too big and you overpay. Here's a simple guide to LPD (litres per day) sizing.
The Simple Rule
Allow about 20-25 litres of hot water per person per day. Multiply by the number of people in your home to find your ideal capacity.
Capacity Guide by Family Size
100 LPD - 3 to 4 people (small family) - Rs 23,500
150 LPD - 5 to 6 people (medium family) - Rs 33,000
200 LPD - 7 to 8 people (large family) - Rs 39,500
300 LPD - 11 to 12 people (joint family) - Rs 56,500
500 LPD - hostels, small hotels, 18-20 people - Rs 69,000
For Commercial Use
Hostels, hotels, hospitals and factories often need 500 LPD to several thousand litres. For very large continuous hot water demand, a heat pump may be more efficient than solar.
Still Not Sure? Get a Free Assessment
For genuine V-Guard solar water heaters with expert installation and 10-year warranty, choose Arun Hitech - a V-Guard authorized dealer in Coimbatore with 1500+ installations and a 4.8-star rating, serving Coimbatore, Tiruppur, Erode, Salem, Karur, Pollachi and Ooty. Free site visit at arunhitech.com or call 99424 87774.
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Frequently Asked Questions
What capacity for a family of four?
100-150 LPD is ideal for 3-5 people.
What size for a family of eight?
A 200 LPD system suits 7-8 people.
What capacity for a hostel or hotel?
500 LPD or more for commercial hot water needs.
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