Solar Knowledge

Reduce electricity usage and reduce electricity costs by considering a grid tie system. A Grid Tie scenario includes also the following assumption:

  • The system is tied to the electrical grid
  • Electricity generated by the solar panels flow back to the grid and utility company
  • The property is credited for electricity generated
  • Electricity is free if more electricity is generated than consumed
  • Excess consumption is invoiced
Which solar charge controller: PWM or MPPT?
Matching solar modules to MPPT charge controllers: Life used to be so simple; in a 12V battery system you took a ā€˜12Vā€™ solar module, watched carefully that the maximum PV current would not exceed the charge controller maximum current and the system would work.Download: VE-MPPT-Calc.xlsx (744KB)
Disconnect switches Applications in photovoltaic systems

The following are external sites which have information relevant to Solar Water Pumping. We hope this information will assist you in your solar water pumping knowledge.

The Borehole Checklist website
Cleaning and disinfecting boreholes website
Pump System Sizing & Layout Diagrams To professionally size and install a water pumping system, depending on the pump type and application various variables need to be taken into consideration: Static head – Vertical height from the dynamic water level to the highest point of water delivery. Suction head – Vertical height from the water level to the pump inlet where the water level is below the pump inlet. Pressure losses – Loss of water pressure due to pipe length and friction caused by pipe material and additional pipe line elements like elbows, valves. For solar water pumping additionally local irradiation levels are necessary to calculate the available power during each day and the effect on water output.
To easily manage and consider the different variables, LORENTZ strongly advises to size pump systems with LORENTZ COMPASS, the solar pump planning software. COMPASS is the LORENTZ tool for designing, planning and specifying solar pump systems. It is available for download to all LORENTZ partners on partnerNET. COMPASS is a PC-based tool to simply specify solar pumping systems in real time. It is based on NASA weather.
For more complex situations COMPASS offers features from suction head calculation to pipe type specific pressure loss calculation
Solar Pumping Planning Guide for the pump PS200HR, PS600HR, PS600C, PS1200HR, PS1200C, PS1800HR, PS1800C
Submersible Pumps Product Overview: PS Centrifugal Solar Pump Systems
Submersible Pumps Product Overview: PS Helical Rotor Solar Pump Systems
Submersible Pumps Product Overview: PSk2 Pump Systems
Submersible Pumps PSk2 Product Power Point Presentation
Surface Pumps Product Overview: PS Surface Solar Pump Systems
Surface Pumps Product Overview: PSk2-CS Solar Surface Pump Systems
Surface Pumps PSk2 Product Presentation
Pool Pumps Product Overview: PS Solar Pool Pump Systems
LORENTZ Connected Product Overview: PS Tracking Systems ETATRACK active Communicator and pumpMANAGER
Solar Parks Product Overview: Tracking System for Solar Parks
Solar vs Diesel Calculator designed to get potential customers to think about how much money it costs them to pump water using diesel power versus using solar power
The Solar Estimate solar calculator is a free online tool showing solar system prices, solar panel production, solar payback calculations and cost of a solar system
PVWatts Calculator Estimates the energy production and cost of energy of grid-connected photovoltaic (PV) energy systems throughout the world. It allows homeowners, small
Roof-top collector. Solar-heated tap water

Please note, however, that this booklet isn’t a technical guide to designing of a solar water heating system.

Solar Water Heater Basics