MUST KNOW Off-Grid Solar Sizing Equations: Calculate EXACT Run Times - ShopSolar.com

# MUST KNOW Solar Sizing Equations: Learn How to Calculate EXACT Battery Bank Recharge Time & Run Time

## Short on Time? Here’s The Article Summary

The article discusses the important factors to consider when determining the lifespan and charging time of a solar generator or battery bank. It introduces two key equations for solar sizing: the battery recharge rate and the battery bank usage time. These equations help in understanding how long it will take to recharge a solar generator from the sun and how long it will last under specific loads.

The article emphasizes the relevance of these calculations for off-grid living and solar setups of various sizes. It also mentions a solar calculator for estimating power needs based on household appliances. The article encourages readers to explore additional resources on solar generators and related topics.

### Introduction

Wondering how long a solar generator / solar battery will last in hours? Or how long it will take to charge a solar generator / solar battery bank from solar panels?

The video below explains the two most important solar sizing equations you need to know when shopping for ANY solar generator / off-grid (battery based) solar kit. Once you understand these two solar sizing equations, you will know how to choose the best solar generator for your needs.

The 2 most common off-grid solar questions we get asked are:

#1. How long will it take to recharge this solar generator from the sun?

#2. How long will this solar generator last me?

The video explains the exact calculations you need to know in order to figure out the answers to the two questions above. (Keep in mind the same logic applies to bigger off-grid battery banks as well).

Again, to recap the video, these two off-grid solar sizing equations are:

### #2. Battery Bank Usage Time or "Run Time"=Battery size in watt hours / Load size in watts

Below you will find a link to the solar calculator discussed at the end of the video. You can go check out the most common household appliances and the average watt hour draw to figure out which generator makes the most sense for you. -- watt hour calculator

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#### Shop Solar

ShopSolar.com is the #1 digital platform that enables consumers & businesses to source and purchase complete solar + storage solutions direct, saving you thousands in time, energy and money.

Over the years, 40,000+ customers have come to know us for extremely affordable prices, legendary customer service, and fast shipping. You can browse best seller's here.

Tallman Whitler - February 28, 2024

How big of a battery backup would I need for a house that uses about 47kwh per day?

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