HT How to use the tool A four-step walk-through, from picking a scenario to sharing the report. …tant, or Everything. How long for the backup window in hours. Set the solar fraction if you want the array to cover less than a full day's energy, and enter your tariff for the savings estimate. Step 4 the system You get… Help ST On-grid, hybrid, PV-diesel and off-grid The four kinds of installation the tool sizes, and what changes between them. …nd storage on a site that already runs a generator, on a weak grid or none. The point is rarely to remove the generator it is to take it off the base load so it runs fewer hours and burns less fuel. The set stays as back… Help TU Terms of use The basis on which this sizing tool is offered. …t is an estimate Power & Sun provides this tool to help plan a hybrid solar system. Every result depends on the load information entered and on standard engineering assumptions. It is not a design, and it is not a substi… Legal AB About this app What the tool does, who it is for, and the engineering behind the numbers. What it does It sizes a hybrid solar system inverter, battery and PV array from three things: the split of your total load , the running time of each load, and the backup time you need. Who it is for Any hybrid installat… About

ABC Peak sun hours (PSH) The number of hours per day of 1000 W/m² equivalent sunshine. A 5 PSH site gives a 1 kWp array about 5 kWh of DC energy a day before losses. Glossary ABC Solar fraction The share of a day's total consumption the array is sized to cover. 100 % means a full day's energy on an average day. Glossary ABC Duty cycle The fraction of its "on" time that an appliance actually draws power. A fridge is on for 24 hours but its compressor runs about a third of t... Glossary