We recommend discussing solar energy options in detail with local service providers, up to 2 or 3 different providers if possible. The following estimates generated from the WCL-Peru facility provide a helpful points of reference:
|47 (± 10) kWh||→ avg. 24hr consumption from an ISL Level 4 facility in active use (n = 43)|
|70 kWh||→ Maximum consumption|
|30 kWh||→ Minimum consumption|
|40%||→ laboratory load directly from PV system (24 hr)|
|60%||→ laboratory load from batteries (24hr)|
|~34.2 kWh||→ minimum battery capacity estimate = (47 x .6) + (10 x .6)|
|~57 kWh||→ minimum required energy production per day = 47 + 10|
Table 1: The WCL-Los Amigos’s solar power requirements, as a reference
- OPEN maps.google.com → place a marker on your site location → right-click and copy the coordinates
- GO TO https://globalsolaratlas.info/map → paste the coordinates into the “SEARCH LOCATION” field. Select ENTER
- FIND “MAP DATA” → ensure you are selected on “SPECIFIC PHOTOVOLTAIC POWER OUPUT” → change units to “KWh/KWp per day” → record the value indicated (KWh/KWp)
- CREATE a table as shown below with the following column headings.
- Panel rating: the watts rating that is indicated on the panels you intend to purchase
- Panel number: number of individual panels that system could have
- Energy retention: this is the amount of energy that is available for work after electrical transfer and voltage conversion (80% retention is a reasonable estimate)
- kW production: calculated by multiplying the first hree columns and then dividing by 1000
- KWh/KWp: the value recorded from the Global Solar Atlas
- Peak production: calculated by multiplying the prior two columns together
|Panel rating (watts)||Panel number||Energy retention||kW production||KWh/KWp*||Peak Production|
IMPORTANT: PV POWER OUTPUT PER DAY is based on an annual average. In the real world seasonality results in lower or higher than the predicted output. In other words, more panels may be needed during dark, cloudy seasons to meet daily energy demands.
Once a solar + battery system is installed it is important to monitor overall system health metrics to keep track of production and battery status.
Once a solar + battery system is installed it is important to monitor overall system health metrics to keep track of production and battery status. These include:
- total daily energy production (kWh),
- battery voltage,
- laboratory consumption (kWh).