IF you have a bit of slope/head pressure to work with, get a 200 gallon or larger tank and fill it during the day, and gravity flow it to your point of use, 24/7. I've installed several systems using the Grundfos SQ Flex line of pumps, some with an array right by the well head, signal wires, 24 gauge, and their control box controls the pump from several hundred feet away. It had a 1000 gallon tank buried in a hillside, used year round at a high mountain cabin, about 25 pounds of pressure in that case, low but doable.
My own off grid house had a 625' deep well, and I was pumping 1.5 GPM using my main solar array, it pumped into a 1000 gallon tank buried in the floor of my shop, with a overflow line buried along with the supply line going to the house 75' away. I had a voltage controlled switch, set up to only pump water once my main 2000 pound forklift battery reached float voltage, then and only then would the pump start to fill the tank. When the tank reached full, a float switch shut the pump down. In the shop's bathroom, a separate 24 VDC pressure pump supplied 35 PSI water to my 80 gallon pressure tank. It was very nearly "city" style flow and pressure, unless you tried to water a lawn or something, for domestic use, cooking and bathing etc., the system worked trouble free for decades.
But the real reason I wanted to post here....is since I abandoned my first spring site on my new property, which was pumped by a Aqua-Tec SWP-4000, in a screened springbox, about 60' lower and 400' lineal to a 900 gallon tank in my hangar (got to keep the grass runway green of course) and had it's own 24 VDC 220 W array nearby. The pump would run whenver there was any brightness at all, could be quite cloudy even, it would just pump slower. Once the tank was full, a float valve would shut, and then the overflow would go out into some trees. Since I recently bought another chunk of ground below my main place, that turned out to have a 15 GPM spring (that hasn't wavered in the last 100 years I'm told!!) I promptly installed a Grundfos SQ Flex pump, a 1040 watt PV array, a 500 gallon holding tank at the spring's outlet, 2100' of 1" poly, buried uphill 300' higher, and a 2000 gallon at the top of my property to give me gravity flow water over the entire 70 acres, I NO LONGER NEED THE AQUATEC PUMP, AND IT'S FOR SALE! That was a long way to go to get my sales pitch in! It's in fine shape, used 3 seasons, and has the control box included. This is a diaphram pump, and it's good practice I'm told to replace the diaphram every few years, depending on use, parts are cheap and readily available, USA built and supported! But I have not felt the need so have not done so. Unless a buyer is quite close to Idaho, the two 110 watt panels that run it wouldn't be worth the shipping cost, I can add them to my "misc." solar gear pile. A quick look around and they seem to be currently priced at $560.00 for the pump, and $236.00 for the controller. call it $800.00. I am asking $450.00 for both. And I'll split the shipping from area code 83245 to the buyers, up to $25.00 anyway.
As an aside, now that my new place (16 years new) is grid tied, my 185' deep well has a basic 1/3 hp 240 AC Grundfos conventional well pump, which goes to a 120 gallon pressure. I figure my emergency water is the 900 gallon hangar tank, and now an additional 2000 gallon tank, plus the creek is within bucket hauling distance, if it gets real Armageddonish.
