Sail Boat Electricity Calculations

	A	B	C	D	E	F	G	H	I
1	House	Anchor				Sea
2	Item	Amps	#	Hrs	Amp Hours	Amps	#	Hrs	Amp Hours
3	Reading Lights	1	4	2	8	1	2	1	2
4	Anchor Light	0.8	1	12	9.6				0
5	Interior Lights	0.5	3	3	4.5	0.5	3	2	3
6	Pressure Water	10	1	0.5	5	10	1	0.2	2
7	Fans	0.25	5	3	3.75	0.25	5	2	2.5
8	Washdown	10	1	0.1	1				0
9	LPG Solenoid	0.5	1	1	0.5	0.5	1	1	0.5
10	Bilge Pumps	5	1	0.1	0.5	5	1	0.1	0.5
11	VHF	0.5	1	12	6	0.5	1	24	12
12					38.85				22.5
13
14	Comforts	Anchor				Sea
15	Item	Amps	#	Hrs	Amp Hours	Amps	#	Hrs	Amp Hours
16	Watermaker	4	1	1	4	4	1	3	12
17	Refrigerator	1	1	24	24	1	1	24	24
18					28				36
19
20	Activities	Anchor				Sea
21	Item	Amps	#	Hrs	Amp Hours	Amps	#	Hrs	Amp Hours
22	Laptop	2.5	1	6	15	2.5	1	6	15
23	SSB	12.5	1	0.5	6.25	12.5	1	1	12.5
24	Other	1	1	1	1	1	1	1	1
25	WiFi	10	1	0.5	5	10	1	0.5	5
26	Device charging	5	2	1	10	5	2	1	10
27					37.25				43.5
28
29	Navigation	Anchor				Sea
30	Item					Amps	#	Hrs	Amp Hours
31	Autopilot					3	1	12	36
32	Plotter					1.5	1	24	36
33	Nav Lights					1	1	12	12
34	Instruments					0.5	1	24	12
35					0				96
36
37					Ah				Ah
38	Total				104.1				198
39
40		Amps	#		Ah	Watts
41	Batteries		2		210
42	Alternator	110	1
43	Solar		2		54	90
44
45					Ah				Ah
46	Daily Deficit				-50				-144
47
48				Hrs				Hrs
49	Engine Running			0.5				1.3
50
51	CHECK!!
52	Daily demand should be 50-50% of battery capacity
53	Add 20% safety margin = four times daily load
54					Ah				Ah
55	Battery Capacity needed				200.4				576
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