Solar Water Pumping - Solar Slow Pump

Solar Slowpump was the world's first commercially available low power solar pump. It was developed by Windy Dankoff in 1983, in response to those who said "that's impossible." Thousands of Slowpumps have been installed worldwide by ranchers, homeowners, missionaries, health workers, government agencies, etc. Some of our oldest Slowpumps are still in daily service.

Slowpump is not submersible, but can draw water from shallow wells, springs, cisterns, tanks, ponds, rivers, and streams, and push it as high as 450 vertical feet and through miles (kilometers) of pipeline. Slow pumping minimizes the size and cost of the solar array, wire and piping.

Slowpump is less expensive than sub-mersible DC pumps, and made in a much wider range of sizes. Wearing parts typically last 5 to 10 years. Overall life expectancy is 15-20 years.

Construction & Features

Rotary vane mechanism (positive displacement) made of forged brass, carbon-graphite and stainless steel
NSFŽ approved for drinking water
Handles sea water, dissolved minerals
Survives most freezes
Permanent magnet, DC motor
AC models use a low-surge PM motor that greatly reduces starting surges, inverter and wire size requirements
Installation and Service Manual is highly detailed and illustrated

"The Slowpump #2507-24V is supplying water for a work camp on the outer island of Onotoa. It's supplying water for 60 people. The well is one half mile [800m] away from the camp." -- B.C., Ministry of Works and Energy, Kiribati, South Pacific

"I have been very happy with the 1308 Solar Slowpump!...We are using it in a 5 meter deep hand dug well in a valley, and pumping 200 meters distant and 50 meters vertically." ---
Dr. D.L., World Missions, Cameroon, W. Africa

"These pumps work great.... Even during low light levels when the motor is turning slowly, a small amount of water can be pumped.... The manual is easy to read. Windy's troubleshooting section is excellent....Not only have these pumps stood the test of time, but small changes have made them even better." --- B. Schultze -product review in Home Power Magazine #42

Reading the Performance Chart

Total Lift = Vertical Distance from surface of the water source to the pipe outlet or top of storage tank, plus any pipe friction loss

Suction Capacity

20 vertical feet (6 m) at sea level -- subtract 1 ft. for every 1000 ft. altitude (1 m for every 1000 m). Pump should be mounted as close to the water source as possible.

Filtration Requirement

This pump CANNOT tolerate dirt. Water MUST be filtered clear using a disposable cartridge filter. If water is very dirty, prefilter it, improve the source, or consider a different pump.

PV-Direct (non-battery) Requirements

The rated power of the PV array must exceed the pump watts by 20% or more.
A Linear Current Booster (controller) is required to function in varying light conditions
Solar Tracker (optional) to increase daily yield (40-55% in summer)

Accessories

Intake Strainer/Foot Valve with fine monel metal screen, stops course debris
Inline Filter (10-inch) uses standard filter cartridges
Intake Filter/Foot Valve (30-inch) replaces Intake Strainer and Inline Filter with a single unit, may be lowered into a shallow well or stream
Spare Filter Cartridges (5 or 10 micron spun fiber)
Dry Run Switch prevents pump damage if source runs dry
Linear Current Boosters (LCB) for PV-Direct

Fittings

1300/1400 Series: 1/2 inch female pipe thread
2500/2600 Series: 3/4 inch male thread

Dimensions (1300/2500-Series)

5.7 x 15.5 inches (14 x 39 cm)
Weight 16 lbs (7 kg)

Warranty

1 year against defects in materials and workmanship

TOTAL LIFT		1322		1310		1308		1304		1303		2505		2507
Feet	Mtrs	GPM	Watts	GPM	Watts	GPM	Watts	GPM	Watts	GPM	Watts	GPM	Watts	GPM	Watts
20	6	0.51	27	0.92	28	1.25	30	1.75	37	2.50	48	3.25	52	4.00	57
40	12	0.51	32	0.92	40	1.25	48	1.75	52	2.50	60	3.23	69	3.95	78
60	18	0.51	36	0.89	45	1.20	54	1.68	63	2.40	78	3.15	90	3.90	102
80	24	0.49	40	0.88	51	1.20	60	1.64	73	2.30	93	3.10	106	3.90	120
100	30	0.49	45	0.88	56	1.20	66	1.64	81	2.30	105	3.08	124	3.85	144
120	36	0.48	50	0.88	61	1.20	70	1.62	90	2.25	120	3.03	142	3.80	165
140	42	0.48	56	0.88	66	1.20	75	1.60	100	2.20	138	2.93	166	3.65	195
160	48	0.47	62	0.87	74	1.20	84	1.60	111	2.20	153	2.85	187
180	54	0.47	68	0.86	81	1.18	93	1.57	121	2.15	165	2.75	205
200	60	0.47	74	0.85	88	1.16	101	1.56	132	2.15	180
240	72	0.45	90	0.83	104	1.14	117	1.54	151	2.15	204
280	84	0.44	102	0.81	120	1.12	135	1.51	175
320	96	0.41	120	0.79	138	1.10	153	1.48	196
360	108	0.41	134	0.76	154	1.05	171
400	120	0.40	150	0.73	176	1.00	198
440	132	0.39	168	0.70	202

Solar Slowpump^tm-1300 & 2500 Series			Weight in (lbs)	Retail Price
22201	Slowpump 1304-12		18	475.00
22202	Slowpump 1304-24		18	475.00
22203	Slowpump 1308-12		18	475.00
22204	Slowpump 1308-24		18	475.00
22205	Slowpump 1310-12		18	475.00
22206	Slowpump 1310-24		18	475.00
22207	Slowpump 1322-12		18	475.00
22208	Slowpump 1322-24		18	475.00
22209	Slowpump 1303-12		20	475.00
22210	Slowpump 1303-24		20	475.00
22211	Slowpump 2505-12		20	475.00
22212	Slowpump 2505-24		20	475.00
22213	Slowpump 2507-12		20	475.00
22214	Slowpump 2507-24		20	475.00
22219	AC Option for Slowpump		25	145.00


Solar Slowpump^tm-1400 & 2600 Series			Weight in (lbs)	Retail Price
22220	Slowpump 1408-24B		30	695.00
22221	Slowpump 1408-36PV/48B		30	695.00
22222	Slowpump 1404-24B		30	695.00
22223	Slowpump 1404-36PV/48B		30	695.00
22224	Slowpump 140324B		30	695.00
22225	Slowpump 1403-36PV/48B		30	695.00
22226	Slowpump 2505-24B		30	695.00
22227	Slowpump 2505-36PV/48B		30	695.00
22228	Slowpump 2507-24B		30	695.00
22229	Slowpump 2507-36PV/48B		30	695.00

Slowpump & Booster Pump Accessories			Weight in (lbs)	Retail Price
20200	EZ Install Kit	for Booster Pump	5	98.00
20235	Inline filter 10"	10" Filter	3	44.00
20236	Filter Cartridges 10"	2 Pack	1	12.00
20237	30" Filter/Foot Valve	30" Filter	3	70.00
20238	Filter Cartridges 30"	3 Pack	2	44.00
20242	Intake Strainer	with Foot Valve	2	73.00
20240	Dry Run Switch	for 1300 & 2503	1	50.00
20241	Dry Run Switch	for Booster & 2500 Series	1	50.00

Slowpump & Booster Pump Replacement Parts			Weight in (lbs)	Retail Price
20301	Motor Brush Set, 12V	Slowpump & Booster Pump	1	20.00
20302	Motor Brush Set, 24V	Slowpump & Booster Pump	1	20.00
20401	Pump Head 1304	Slowpump 1304	4	131.00
20402	Pump Head 1308	Slowpump 1308	4	131.00
20403	Pump Head 1310	Slowpump 1310	4	131.00
20404	Pump Head 1322	Slowpump 1322	4	131.00
20405	Pump Head 1303	Slowpump 2503	5	193.00
20406	Pump Head 2505	Slowpump 2505	5	193.00
20407	Pump Head 2507	Slowpump 2507 & Booster	5	193.00
20408	Pump Head 2507 Rebuild	RETURN OLD PUMP HEAD	5	131.00
10003	Instruction Manual	Slowpump & Booster Pump	1	5.00

		1408		1404		1403		2605		2607
Feet	Mtrs	GPM	Watts	GPM	Watts	GPM	Watts	GPM	Watts	GPM	Watts
160	48									4.30	283
180	54							3.35	280	4.25	305
200	60							3.33	296	4.20	338
240	72					2.55	266	3.30	331	4.05	396
280	84					2.50	302	3.25	373	4.00	444
320	96			1.66	255	2.50	338	3.20	410
360	108			1.62	280	2.50	374	3.16	450
400	120			1.64	312	2.50	406
440	132	1.10	269	1.66	341	2.50	451