YouTube transcript (QkcdCntAhlo) — Transcript

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1. 0:00Good evening, from wherever you're
2. 0:01watching. I am your tutor Mydown Raymond
3. 0:04Byda Cara. And we are talking about load
4. 0:07assessment today. So, we are going to be
5. 0:08using this customer's house as a typical
6. 0:11example of a house where maybe a client
7. 0:14tells you that okay, I need a solar
8. 0:16system that can power my house. So, this
9. 0:19is a comfortable space. So, we are going
10. 0:22to be ascertaining all the load in this
11. 0:24house with their wattages. Now, going
12. 0:26over here, we have the TV. This is a
13. 0:2943-in flat TV and it consumes over 47.5
14. 0:33W. This is the standing fan of the
15. 0:36customer. It consumes over 20 W.
16. 0:39These are lighting points and they are 5
17. 0:41W each times eight points around the
18. 0:43building. That is over 40 W. So, we are
19. 0:46writing down these things as we are
20. 0:48getting them. So, look at ceiling fan.
21. 0:51This is ceiling fan. And what we check
22. 0:52is 75 W. So, we wrote it down, ceiling
23. 0:54fan, 75 W. So, this is a chandelier
24. 0:57lighting.
25. 0:59And he wants chandelier lights on as
26. 1:01well. And it's 30 W of power. So, we
27. 1:03wrote down chandelier, 30 W. So, going
28. 1:06over the kitchen, we have a small
29. 1:08freezer there which consumes over 80 W.
30. 1:11So, we also jot that down, 80 W. So,
31. 1:14each of these appliances, you have to
32. 1:15take note of them and write their
33. 1:18different wattages. Now, after writing
34. 1:20these wattages, what you have to do is
35. 1:21consider the run time. You ask the
36. 1:23customer, "How long do you want this
37. 1:26system to run for?" Okay, according to
38. 1:29this customer, he wants to be using TV
39. 1:32for 6 hours a day. He's a businessman.
40. 1:35So, for us to get the run time of TV,
41. 1:37we'll calculate 47.5 W equally 48 W
42. 1:41times six. That's for TV. We asked him
43. 1:44for the chandelier. He said the
44. 1:45chandelier will be used within
45. 1:48um 7 hours a day. So, we are going to
46. 1:51count 30 W
47. 1:53times seven. That's for chandelier. The
48. 1:55lighting points are going to be on for
49. 1:5814 hours. That's throughout the night.
50. 2:00So, we are going to check 40 W
51. 2:03times 14. Then he said the standing fan
52. 2:08he is going to be using it for 12 hours.
53. 2:10So, we are still going to do standing
54. 2:11fan 40 W
55. 2:13times 12. So, we are calculating the
56. 2:16wattage of the appliance by the run
57. 2:19time. That will give us the total daily
58. 2:22run time per hour. So, now looking at
59. 2:25the ceiling fan, he said he wants to be
60. 2:27using the ceiling fan for 4 hours a day.
61. 2:30That's during the afternoon while
62. 2:31there's heat. So, calculating for the
63. 2:33ceiling fan 75 W times 4.
64. 2:38For the fridge uh the fridge, he wants
65. 2:40to be using the fridge for 4 hours a day
66. 2:43so that uh it can be very cool for food.
67. 2:46So, we are going to be doing 80 W as
68. 2:48well times 4.
69. 2:51So, you see after this, we are going to
70. 2:54be timesing all of this shortly to get
71. 2:57the
72. 2:58total watt of each of these appliance.
73. 3:01So, we are working with this for the TV,
74. 3:03chandelier, lighting points, standing
75. 3:07fan,
76. 3:08ceiling fan, and the fridge.
77. 3:11So, while we do this multiplication, it
78. 3:13is going to give us the total run time
79. 3:15for each of these appliances and it's
80. 3:17going to be written down here shortly.
81. 3:20We are done with the calculation of
82. 3:22everything as you can see.
83. 3:24First of all, we multiplied the watt by
84. 3:26the run time, which gave us the total
85. 3:28daily watt per hour, which are all
86. 3:30listed here.
87. 3:31Now, what we did we added all the total
88. 3:33daily watt per hour
89. 3:35to get the total sum as you can see.
90. 3:39Then now we added all the total watt of
91. 3:41the appliances together. That's on the
92. 3:43TV, the chandelier, all of them to get
93. 3:45the total watt of appliance. Now, these
94. 3:47are the things you need to consider.
95. 3:49That is why this part is very important
96. 3:51that you listen.
97. 3:52This one that you added for appliances
98. 3:55will tell you the type of inverter
99. 3:58you are going to use.
100. 4:00And that type of inverter you're going
101. 4:02to use will now the efficiency of that
102. 4:04inverter will now determine
103. 4:06on your battery selection and solar
104. 4:08panel selection. So now if you have
105. 4:10gotten the type of inverter
106. 4:11for a 313 W load
107. 4:14a one a 1.5 KVA inverter is suitable for
108. 4:18it. But let's just say for for much more
109. 4:21space and extra capacity let's work with
110. 4:23a 2 KVA hybrid inverter. Yes, it's a 313
111. 4:27W but we'll give him 2 KVA. So we have
112. 4:30gotten the inverter 2 KVA hybrid.
113. 4:34Remember I talked to you about hybrid.
114. 4:36So you know what hybrid is. The panel
115. 4:38will be coming inside and it's also
116. 4:40sending light. So we have gotten the
117. 4:41inverter. So now for battery selection
118. 4:46the efficiency of hybrid you all know
119. 4:48that I told you hybrid is high class of
120. 4:50panel. So we are going to be working
121. 4:52with 90%
122. 4:54efficiency. That is almost 100. So we
123. 4:57are going to use it to set to get
124. 4:59battery the type of battery we can go
125. 5:01for and the type of solar panel now. So
126. 5:04let's quickly dive into battery and
127. 5:06solar panel.
128. 5:07Once you are done with here
129. 5:10you have to be you have to listen. These
130. 5:12are all pure calculations. So that you
131. 5:15can tell the customer the load. Now you
132. 5:17have gotten the inverter that the
133. 5:18customer needs. is what 2 KVA. Now let's
134. 5:22go over to the kind of battery that you
135. 5:24can give the the customer.
136. 5:26Now if we want to give the customer
137. 5:29tubular battery for example tubular
138. 5:31batteries
139. 5:32has 70% discharge rate depth of
140. 5:36discharge. Lithium ion batteries has 80%
141. 5:40while lead acid batteries has 50%. So
142. 5:44for the sake of this video we are going
143. 5:45to be using tubular batteries as an
144. 5:48example. So, if it has 70% as depth of
145. 5:52discharge, also known as DOD. So, we
146. 5:55will say our DOD of our battery that we
147. 5:57want to use
148. 5:58the DOD of our battery
149. 6:01is 70% DOD
150. 6:0470%. That's for battery. Our inverter
151. 6:08efficiency
152. 6:10is what? 90%. Remember remember.
153. 6:15Efficiency is 90%. Now, we're going to
154. 6:17be looking at the voltage we're going to
155. 6:19be using for this system. So, in this
156. 6:21system, we want to be using a 24 V
157. 6:2524 V. So, let us work with 24 V.
158. 6:30For example,
159. 6:34let's work with 24 V.
160. 6:3724 V. Remember I told you battery ranges
161. 6:40in voltage. 12 All batteries are in 12
162. 6:43V. Uh-huh. We will get into that in the
163. 6:45next part. So, now, how to get the kind
164. 6:47of battery you want to use.
165. 6:49Changing this to decimal, 70% gives you
166. 6:52what? 0.7.
167. 6:5490% gives you what? 0.9.
168. 6:58And 24 V remains. So, we will pick that
169. 7:00our total wattage 2,158.
170. 7:05We'll bring it here.
171. 7:072,158
172. 7:09divided by
173. 7:11DOD first.
174. 7:130.7.
175. 7:15It gives you 3,000
176. 7:191,111
177. 7:21for example.
178. 7:23We're using for example. Then now, if
179. 7:25you now go for inverter efficiency,
180. 7:28we're now saying 3,111
181. 7:31divided by 0.9 gives you maybe 4,444
182. 7:37for example.
183. 7:39Now, we will now bring down this 4,000
184. 7:43444
185. 7:45divided by 24 V which we are working
186. 7:47with. That will now give us the amperage
187. 7:50of battery we are working with, which is
188. 7:52185
189. 7:55A.
190. 7:56So, approximate to normal battery
191. 7:58amperage, if you're making use of
192. 8:00tubular, tubular always rated in 220 A.
193. 8:03So, we are making use of 220 A
194. 8:06tubular battery.
195. 8:10So, now you've gotten battery and you've
196. 8:12gotten inverter. Now, to get solar
197. 8:15panel, simply divide
198. 8:182,000
199. 8:20158
200. 8:232,000
201. 8:25158
202. 8:28by the total run time that you have peak
203. 8:30sun in your area. Remember solar area
204. 8:32days as we discussed about, right? So,
205. 8:34by the time you divide it, let's just
206. 8:36say by five. It will now give you the
207. 8:39wattage of the solar panel that is
208. 8:41required by one to be used. So, for
209. 8:45example, if you divide it and you get a
210. 8:47a digit like maybe as uh 300 W.
211. 8:53Once you're getting that, you're you're
212. 8:55you're now sure that 300 W panel is what
213. 8:57you want to use. So, now, while choosing
214. 9:00300 W panel, you have to choose it to be
215. 9:03able to outmatch 2,158.
216. 9:06Like, it should be times two or maybe
217. 9:08half of it. So, if it's 300 W panel, how
218. 9:12many units of 300 W panel will give you
219. 9:152,158?
220. 9:17So, you will now check how many will
221. 9:19give you beyond 2,158,
222. 9:23then you use that certain number for the
223. 9:25job. So, that is it. Simply follow the
224. 9:29assessment. So, now I believe with this
225. 9:32um knowledge, you can practice with this
226. 9:34and work with whatever appliance you
227. 9:36need so that you'll be able to master
228. 9:38it. Whenever you go to a customer's
229. 9:40house, you can comfortably do assessment
230. 9:42when you are cutting the list of load,
231. 9:44go home, do your assessment, do this
232. 9:46calculation as you just listed, and you
233. 9:48will come back and give the customer the
234. 9:50accurate system that is required for the
235. 9:53installation. So, that's it for load
236. 9:55assessment.