### How to build Photovoltaic 2 go from used Mobile Phone batteries

via Off-Grid.at

Do you remember those “inventors” designing their own powerwall systems? One of these “gurus”, Jehu Garcia, went to work after Hurricane Maria to fight the power crisis in Puerto Rico. He posted a video on YouTube introducing his design for a solar generator that costs around \$ 550 (about 500 Wh or about 0.5 kWh or 300 watts of AC power for 1.5 hours), including the cost of a solar panel and Light bulbs. How Leonardo Di Caprio invests in the offgrid solar company Kingo here on
Energie Blogger.

There are many ways to help the people of Puerto Rico, that is my modest attempt to bring emergency power to the 70% without power on the island. Please help me by building one of these devices and giving it to someone in need. Please send finished solar generators or materials to the following address: Donations for Power 2 Puerto Rico: Amazon Wish list for solar materials:

You can donate: http: / /j35.us/helpwithcash

or you can use our sponsor will https://www.patreon.com/jehu

Sponsors http://j35.us/jag35-2016 http://gabvwkey.com http://j35.us/indiespot-2016 http://evwest.com http://www.rode.com/products

http: / /j35.us/helpwithcash

WishList on AliExpress: https://my.aliexpress.com/wishlist/shared.htm?groupId=100000005611994

Use the sliders for kWh to calculate Ah (4 × 40 pieces of mobile phone batteries each about 800 mAh * 40 are about 32 Ah * 14.8 volts are 473.6 Wh when fully discharged!)
Wh or 1000 for 1 kWh

Volt of you Batterie System:

Ah Storage needed:
Ah Capacity of your Battery Bank

Batterie bank in Ah in Kilo Watt hour (kWh) Power

Power in kWh(1 kilowatt hour = 1000 watt hour . Dott ):

System Volt of the Battery System:

Amp-hour (Ah) Capacity of your Battery Bank

Estimated Weight in kg to kwh to Ah to weight Conversion:

Weigth of Lithium Battery kwh zu Ah in kg:

Methodology
The formula:
Ampere hour = Watt hour / Voltage
1kW = 1000W

The parallel connection of batteries makes it possible to individually increase the capacity while maintaining the same voltage

## Switch batteries or cells in parallel

In parallel connection of rechargeable batteries, the positive pole is connected to the positive pole and the negative pole to the negative pole. The charging capacity (Ah) of the individual batteries then adds up while the total voltage corresponds to the voltage of the individual batteries. Basically, only batteries with the same voltage and acid density should be connected in parallel with the same state of charge and the cable cross-sections and cable lengths should be exactly the same
Battery Ah per battery (0.8 for 800 mAh)

System Volt vom Batterie System:

Anzahl der Batterien

When the batteries are connected in series or in series, the voltage adds up, but the storage capacity remains the same..

## Batteries connected in series

Interconnection of any number of solar batteries is usually done as a series connection. In this case, the negative terminal of one battery is connected to the positive terminal of the other battery, so that all batteries are supplied with the same current. The resulting total stress is then the sum of the partial stresses. The series connection of batteries is often referred to as a series connection
system Ah from the battery system (0.8 for 800 mAh)

System Volt vom Batterie System:

Number of batteries