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1 Site Search - Quick Index | 2 The Realities of Purchasing On-Line | 3 Why Do Business With Us? | 4 Distributor of IOTA Engineering, Quick Cable and Thin-Lite products | 5 Photovoltaics,Batteries, Cable and Wire | 6 Lumen Outputs of Compact Fluorescent and Incandescent Lights | 7 48 volt D.C. fluorescent lights | 8 Low Voltage DC Lights | 9 Why buy Thin-Lite lights? | 10 Thin-Lite Emergency Survival Disaster LED lights | 11 Bogart Engineering Battery Management System packages | 12 Educational Pages On This Site. | 13 Balanced Battery Charging and Dis-Charging by IOTA | 14 Portable & Emergency Fluorescent Light by Flexcharge | 15 DC Fluorescent Inverter Ballasts by IOTA Engineering and Montana Light | 16 Charge Controller Musings | 17 Bogart Engineering SC-2030 Solar Charge Controller | 18 PV Solar charge controllers with night lighting load by Flexcharge | 19 Thinlite Indoor Fluorescent Lights | 19 A - LED Lighting by Thin-Lite | 20 Thinlite Outdoor Lights | 21 Thinlite Replacement Ballasts | 22 Thinlite Replacement Lens - Diffusers | 23 Thinlite DC Lighting Products | 24 DC Lighting | Glossary of Alternative Energy Terms | 25 Parallel and Series Battery Bank Information | 26 What we sell and why. | 27 Amps Volts and Watts | CHARGE CONTROLLERS | 28 Emergency and Disaster Preparedness Notes | 29 Photovoltaic Module & System Wiring - Setting Up A PV System | 30 Wind - Hydro - Solar Charge Controllers by Flexcharge | 31 Water and Air Heating Diversion Loads for Charge Controllers | 32 Maximum Power Point Tracking Solar Charge Controllers by Solar Converters | 33 Solar Converters, Inc. Charge & Lighting Controllers | 34 SES Flexcharge Solar Single or Dual Battery Charge Controllers | 35 Thin-Lite ballast replacement installation guide | 36 Solar Converters Special Solar and Battery Charging Equipment | 37 TriMetric Battery System Monitors and Deltec Co. shunts | 38 Timers,Linear Current Boosters,Photoswitch,Voltage Controlled Switches | 39 Battery Desulphator by Solar Converters, Inc. | 40 Bogart Engineering Product Index - Links | 41 SES Flexcharge Products | 42 QuickCable links to instock products | 43 Thin-Lite products we stock | 44 DC Fuse & Circuit Breaker Types & Installation | 45 Switches - DC rated wall switches | 46 IOTA Engineering IQ4 Smart Charge Controller Owners Manual | 47 Our own alternative energy systems | 48 DC Fuses, Holders & Fuse Blocks | 49 Class T- DC Fuses & Fuse Blocks | 50 ANN - ANL - CNL DC Fuses & Fuse Blocks | 51 Inverter Cable and Overcurrent Protection Guide | 52 Installation and trouble shooting low voltage d.c. lighting | 53 Diodes - Blocking & Bypass, What do they do? | 54 Low Voltage D.C. 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95 Battery Condition and State of Charge Charts
Always wear eye protection when working
near batteries.
Even a small battery stores a great deal of
energy which can be released during a
short circuit.
The electrolyte contained in batteries is
corrosive.
The following information is courtesy of Ralph Heisy of
Bogart Engineering.
Battery voltage will vary for the same state-of-charge depending on whether
the battery is being charged or discharged and what the current flow is in
relation to the size of the battery.
The chart below will give you an idea of state-of-charge for various battery
conditions in flooded cell lead-acid batteries.
Voltage varies with temperature.
While charging, a lower temperature will increase battery voltage.
Full charge voltage on a 12 volt battery is 0.9 volts higher at 32 deg. F.
While discharging, a higher temperature will increase battery voltage.
There is little temperature effect while a battery is standing.
The following information is courtesy of
AEE Solar.
A hydrometer is very accurate at measuring battery state-of-charge if you measure
the electrolyte near the plates.
Unfortunately, you can only measure the electrolyte at the top of the battery.
When a battery is being charged or dis-charged a chemical reaction
takes place at the border between the lead plates and the electrolyte.
During charging the electrolyte changes from water to sulphuric acid.
The acid becomes stronger and the specific gravity rises as the battery charges.
Near the end of the charging cycle gas bubbles rising through the acid stirs the
fluid to mix it.
It takes several hours for the electrolyte to mix so that an accurate reading can
be taken at the top of the battery.
Always try to take readings after a period of no charge or no discharge.
