Guides & Education

Divide your daily kWh use by your peak sun hours to get array size, then divide by panel wattage. Worked tables for 10-40 kWh/day homes at 4, 5 and 6 sun hours, using 400W panels.

Size a freeze dryer by pounds per batch and batches per week: Stay Fresh Small ($1,750), 5-Shelf ($2,699, 12-18 lb per batch), 7-Shelf ($3,099), Large ($4,335) and Mega ($5,355) compared.

Start with 20 BTU per square foot, then adjust for climate, sun, insulation and room use. Full square-footage-to-BTU table, worked examples, and the case against oversizing.

Well pumps are a surge problem, not a wattage problem: a 1HP pump may run at 1,200W but start at 6,000W. Match your inverter's surge rating to the pump — here is the sizing table and method.

A 10kW system usually pairs with 2-3 large LiFePO4 batteries (32-48kWh). Size storage by daily critical load and days of autonomy — here is the math, with worked examples and prices.