Hup Solar-One User manual

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Solar-One® Battery System
USERS MANUAL
Table of Contents
Precautions and receiving the battery Page 2
Installation and initial charge Pages 3 & 4
General Maintenance Page 5 –7
Charts and Graphs Page 8
Specifications Page 9
Recharge Settings Page 10
Diagrams Pages 11 & 12
Troubleshooting Page 13
Maintenance Guidelines Page 14
Warranty Page 15
Water Warning Page 16
Copyright Northwest Energy Storage Inc. 2011-2012 Revised 09/13/12

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Precautions and Warnings
Immediately inspect the exterior of the packaging,
including the pallet. Look for wet spots or stains that
would indicate the battery was damaged or tipped over
during transit. If there is visible evidence of damage
you should make a note on the shipping papers
“SHIPMENT RECEIVED DAMAGED”. Refuse the
shipment and notify your Solar-One dealer. Shipping
damage is not covered under the battery warranty.
Photographs of the damage will be very helpful.
When the shipment is received and there is no visible
damage, but damage is found during unpacking,
immediately file a “CONCEALED DAMAGE
REPORT” with the shipper and notify your Solar-One
dealer. Shipping damage is not covered under the
battery warranty. Photographs of the damage will be
very helpful.
Your Solar-One Battery is packaged by professionals using quality materials to DOT specifications. If the
condition of your shipment is not received reasonably close to the above photo, contact your Solar-One Dealer or
call 941-474-0110.
Receiving the Battery
Batteries contain sulfuric acid (which causes severe burns) and while being charged, emit hydrogen gas which is
explosive. You must always assume the battery is emitting hydrogen gas. Batteries are always electrically live
and will deliver very large amounts of current if shorted. To reduce the risk of personal injury and/or harm to
property and the environment follow the precautions below.
Do not smoke, use open flames, or create an electrical arc or spark in the vicinity of the battery.
Use insulated tools, remove all jewelry, wear protective clothing and eye/face protection when working on
batteries.
If you get battery acid in your eyes immediately flush with clear water for 15 minutes and seek medical
attention. Do not use neutralizing agent in your eyes.
Always keep a solution of neutralizing agent on hand. (1 gal. Of water thoroughly mixed with 1 lb. Of bak-
ing soda) use this agent to neutralize any acid that may get on your skin or clothing and for general bat-
tery cleaning. Rinse with clear water when bubbling stops.
Ensure the battery compartment is well ventilated. When powerventing devices are used, ensure that they
are functioning properly.
Only use the cell lifting strap provided to remove cells from the tray. If the battery is to be installed with
all cells in the tray, cover the cell terminals with a non conductive material such as plywood or a thick rub-
ber material.
Only persons who are trained to maintain, install and care for batteries should be allowed to work with
the battery.
Only use distilled or deionized water and do not over fill.

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Installation
Caution: These cells can be extremely heavy, a come-
along or block and tackle may be needed to
do the lifting. Do not try lifting these cells by
yourself, serious injury could occur.
Step 1 Acquire the following safety items: safety glasses or face shield, acid resistant apron, insulated
1/2” wrench, insulated ratchet with 1/2” socket, 1 gal neutralizing agent, ( 1 lb baking soda to 1 gal. water, mix this
solution thoroughly) rubber gloves
Step 2 Inspect the battery tray (steel case) for evidence of damage, if damage has occurred file a claim
with the carrier immediately. If you see liquid on the top of the cells pour some neutralizing agent into a small
container and apply with a clean paint brush. Be extra careful not to get any of this agent into the cell. Apply
this agent to the terminals and the cell tops until bubbling stops. Rinse with clear water and wipe dry.
Step 3 Remove the tray lid by tapping one hinge back into the lid hinge, or remove the internal hex bolts.
Step 4 Remove the buss bars.
Warning: Do not allow the lid to fall onto the terminals as this could cause shorting from terminal to
terminal. Cover the cell terminals with a nonconductive material such as plywood or a
thick rubber material, etc.
Note: If the battery can be installed without removing the cells, connect a chain to the holes on the end of the
tray. Be sure the lid is closed and that a non conductive material such as plywood or thick rubber covers
the terminals. Use a 2x4 wood spreader that is approx. 1/2” shorter than the tray. The spreader will
prevent end pressure on the tray.
If the battery cannot be installed without removing the cells because of weight concerns proceed
to step 3 skipping step 6.
Warning: The weight of the cells will cause the sides to bulge when removed from the tray, this
is normal, however use caution when handling the cells. Any pressure on the sides will cause the
cells to “breathe” and can release small droplets of electrolyte in the area of the cap. Placing a
cloth over the vent cap will reduce this hazard. To prevent serious and permanent damage to the
battery, do not leave the cells out of the “tray” for more than 24 hours.
Note: As you remove the cells from the tray you may notice
the electrolyte level is low. DO NOT add water to
the cells, this condition is normal. See “Initial Charge”
section on the next page.
Step 5 Connect the cell lifting strap into the holes of the terminals that are inline with the round post
that protrude from the case. (see photo below) Lift the cells out of the tray. The first cell out of the tray will be
harder than the remaining cells. If you find the first cell very hard to remove try another cell or lubricate with
soapy water. If the clevis on the cell lifting strap will not slide over the terminal, slightly spread the clevis.

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Installation cont.
Step 6 Neutralize the sides of the cells and the steel tray. Rinse and dry thoroughly.
Step 7 Move the steel tray to the desired location.
Step 8 Install the cells back into the tray using the diagram on page 12 to ensure the cells are correctly
installed. The cells must be completely seated in the tray to properly install the cell interconnects. All plastic
spacers must be reinstalled when the battery is reassembled.
Step 9 Referring to the diagrams on page 12 install the nuts and bolts in the exact pattern as shown.
Torque all bolts to 40 in. lbs. and re-torque annually.
Step 10 Install the lid by tapping the hinge pin back into the tray hole. When you install the lid you have
a choice of where the hinges are located. Some lid hinges use a internal hex head bolt, use an Allen wrench to
remove and replace the lid.
The battery ships from the factory with a minimum specific gravity of 1.265. However when received, the electro-
lyte level may be low and have a lower than 1.265 reading. This has to do with shipping, handling and hot tem-
peratures in trucks. Prior to adding water, charge the battery at 15 volts for a 12 volt system, 30 volts for a 24 volt
system, and 60 volts for a 48 volt system. The charge should be applied until the electrolyte level rises to the nor-
mal level or slightly lower, and a full gravity of 1.280 is achieved. Label each cell, check the specific gravity and
voltage of all cells, and enter the information in the area provided below.
Warning: Never allow tools or other conductive objects to make contact with two or more battery
terminals.
Initial Charge
Cell ID. Volts Specific Gravity Cell ID. Volts Specific Gravity

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Adding Water
Fill to: 1/4" (+/-) from the bottom of the filler neck throat. (See cell drawing below) A flashlight will make adding
water much easier. Putting a full level mark on the hydrometers rubber tube will be helpful too.
A certain amount of fluid loss is normal in all batteries, and must be replaced at regular intervals with distilled or
deionized water. Over-filling is one of the most common errors made during battery maintenance and will cause
gradual lowering of the specific gravity and a subsequent loss of capacity, corrosion to the tray and the intercell
connectors. Add water after the battery has finished charging and after taking hydrometer readings. If the battery
is subjected to freezing temperatures it is a good idea to add water when the battery is reaching appx. 75% charged
or 1 hour before ending an equalize charge. It can take up to several days for the newly added water to mix with
the rest of the acid, this water could freeze before mixing with the electrolyte.
General Maintenance
Warning: Do Not Overfill. Do Not Use Tap Or Well Water they may contain small amounts of nickel,
iron, manganese, copper, chlorine, nitrates, etc. These and other minerals can seriously affect
battery life and may void your warranty.
1” +/-
1/4” +/-
1/2” +/-
1 1/4” +/-
3 1/4”
Flip Top
Filler Cap
Cell Lid
Filler Neck Throat
Cell Jar
1/4” +/-
Approx. 25”
Full
Low
Electrolyte
3/4” +/-
Warning: Always wear protective clothing and eye/face protection when working around batteries. If you
should get acid in your eyes or on your skin, flush with clear water for 15 minutes and seek
medical help. Do Not use neutralizing agent to flush your eyes!

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Using a Hydrometer:
Insert the rubber tube into the cell, but not into the electrolyte. Squeeze the bulb and lower the rubber tip
into the electrolyte, now release the pressure from the bulb. The barrel will fill up and the float will rise. It is very
important for the float to be freely suspended in the electrolyte. Gently move the hydrometer back and forth until
the float is not in contact with the barrel. Where the numbers on the float intersect with the top of the electrolyte is
the specific gravity. See the following section for interpreting your hydrometer readings. With the rubber tip in
the cell, but not submersed into the electrolyte squeeze the bulb and drain the electrolyte back into the cell. Wipe
dry any spilled electrolyte. We recommend the NAPA 700-1145 hydrometer.
Using a Refractometer
Remove the small wand/pipette from the refractometer, and dip into the cell. Place one to two drops of
electrolyte on the slide of the refractometer, and then close the slide cover. Look into the eyepiece, and take your
reading from the Battery Charge/ Specific Gravity Scale. The Horizontal break between the light is where you take
your reading. Clean with distilled water before and after each sample. Use all the normal precautions when dealing
with electrolyte. Both the hydrometer and the refractometer will give accurate readings of specific gravity. It will
basically come down to preference on which one to use, however the refractometer is less intrusive to the battery
itself, more durable, easier to read, and safer. We recommend the MISCO Hand-Held Refractometer 7084VP.
Specific Gravity:
The standard fully charged specific gravity for the Solar-One is 1.275-1.285 @ 77° F the 100%
discharged gravity is 1.140 @ 77° F. Since the acid content of the electrolyte decreases linearly as the cell is
discharged, the decrease in gravity is directly proportionate to the amount in ampere-hrs taken out. The specific
gravity at any point in the discharge indicates the depth of discharge, and can be translated into ampere-hrs taken
out. Knowing that the fully charged specific gravity is 1.280 and the discharged specific gravity is 1.140 we can
find our state of discharge.
Example: Assume the specific gravity is 1.180. 1.180 is 100 points below the fully charged specific
gravity of 1.280. With a difference of 140 points from 100% charged to 100% discharged we can divide 100/140 =
71% discharged. Use this formula to help keep your Amp/Hr meter synchronized with your battery.
Temperature:
Lead-acid batteries are a chemical reaction, and when subjected to different temperatures will produce
different results. The normal operation temperature 77-80°F. Lower than normal temperatures will reduce
capacity, slightly extend life, require a higher recharge voltage, and cause specific gravity readings to be adjusted
down, from the actual reading. Higher temperatures have the opposite effect. Correction tables can be found on
page 8 of this manual.
Equalize Charge:
The term “equalize” simply means a controlled overcharge. This procedure is used to adjust the
difference between cells that develop due to temperature variations within the battery, manufacturing, and cycling
of the battery. The equalize charge will also help scrub off sulfate particles that tend to build-up on the positive
plate of the battery. When to equalize: If a cell has a .020 difference in specific gravity or at least once a month.
How to equalize: Generally you continue the bulk charge for an additional 2-3 hours after the battery has become
full. The equalize charge rate should be appx. 2% - 5% of the battery capacity. This will tend to raise the battery
voltage 1-1.5 volts above the bulk setting. Ensure that any sensitive loads can accept this higher voltage.
General Maintenance
Warning: All Lead-Acid batteries are considered discharged when 80% of the capacity has been removed.
Never remove more than 80% of the battery capacity.
Note: Most inverters or charge controllers use a battery temperature sensor, secure the probe to the lead
interconnect where the terminals penetrate the cell. Use the most central cell of your battery.

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Voltage
There is a definite relationship between the cell voltage and the specific gravity of a cell that is open
circuit (no charging or discharging for at least 24 hours). These open circuit voltage readings are useful in
determining uniformity. A fully charged open circuit with a specific gravity of 1.260 - 1.280 will read 2.10 volts
per cell to 2.12 volts per cell at 77°F. This spread of .02 vpc is considered normal for a new battery As the battery
ages the spread will increase to about .03 to .05 vpc.
If all cells of a battery show similar full-charge voltages, they are equally healthy. The uniformity and
value of the individual cell voltage readings vary with the overall condition of the battery. A battery with an on-
charge voltage of 2.45 to 2.50 volts per cell has more uniformly healthy cells than a battery having an on-charge
voltage spread of 2.40 to 2.50 volts per cell. The age and service duty of the battery must be considered in the
interpretation of the on-charge voltage readings. An example would be an older battery which has on-charge cell
voltage readings of 2.45 volts to 2.65 volts. The reason may very well be that the inside cells operate at higher
than average temperatures causing higher local action, which would result in lower voltage. Regular equalize
charging will compensate for the higher self-loss of the inside cell. Any wide spread in on-charge voltage that
could not be attributed to the service life or age of the battery, is a sign that something is wrong and attention is
necessary. Some causes of abnormally wide spread or charge voltages are: Abnormal temperature differential,
internal shorts, acid loss causing overdischarge, insufficient charging, and insufficient equalize charging.
Sulfation
All lead-acid batteries sulfate when discharged. The active material must convert to lead sulfate in order for the
cells to produce energy. The term sulfated battery means that the battery has developed abnormal sulfate and has
its capacity reduced as a result. The most common causes of sulfation are:
1. Under charging or neglect of equalize charge.
2. Standing in a partially or completely discharged condition.
3. Low electrolyte level.
4. Adding battery acid.
5. High specific gravity.
6. High temperature.
Cells of a sulfated battery give a low specific gravity and voltage readings and the battery will not become fully
charged after a regular equalize charge. Before assuming that the battery is sulfated, rule out the possibility that
low specific gravity may be due to acid loss. If the sulfation has not progressed too far, it may be possible to return
the battery to a serviceable condition by paying careful attention to the following:
(A) Neutralize, wash and dry the battery.
(B) Add distilled or deionized water to the proper level.
(C) Charge the battery at 2% of its 6 hr capacity until 100% of the battery’s capacity has been restored. The 6 hr
capacity is on the label on one end of your battery.
(D) Discharge the battery to 1.75 volts per cell (10.5 for 12 volt systems, 21 for 24 volt systems or 42 for 48 volt
systems) making sure not to allow any cells to drop below 1.75 volts or cell reversal may occur. Cell reversal can
be identified by very high cell voltage (3-4 volts) while on charge, or very low cell voltage (1 volt or less) while
being discharged.
(E) Recharge until the specific gravity is the same for 3 hours.
(F) Repeat the process until the specific gravity remains constant. If the battery gives 80% or more you have
succeeded, if not, replace the battery.
General Maintenance
Warning: Do not let your battery stand in a discharged state for more than 24 hours or when temperatures
are below freezing.

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Charts and Graphs
1.280
1.260
1.240
1.220
1.200
1.180
1.160
1.140
1.120
Specific Gravity Vs.
Percent Discharged
0 10 20 30 40 50 60 70 80 90 100
% Discharged
Cell Voltage
Temperature Correction
Electrolyte
Temperature
Cell Voltage
Correction
49-51 °F -.09
52-54 °F -.08
55-57 °F -.07
58-60 °F -.06
61-63 °F -.05
64-66 °F -.04
67-69 °F -.03
70-72 °F -.02
73-75 °F -.01
76-78 °F No Correction
79-81 °F +.01
82-84 °F +.02
85-87 °F +.03
88-90 °F +.04
91-93 °F +.05
94-96 °F +.06
97-99 °F +.07
100-102 °F +.08
Specific Gravity
Temperature Correction
Electrolyte
Temperature
Hydrometer
Correction
49-51 °F -.009
52-54 °F -.008
55-57 °F -.007
58-60 °F -.006
61-63 °F -.005
64-66 °F -.004
67-69 °F -.003
70-72 °F -.002
73-75 °F -.001
76-78 °F No Correction
79-81 °F +.001
82-84 °F +.002
85-87 °F +.003
88-90 °F +.004
91-93 °F +.005
94-96 °F +.006
97-99 °F +.007
100-102 °F +.008
Temperature Effects on
Battery Capacity
Temperature Capacity
77 °F 100%
60 °F 95%
50 °F 91%
40 °F 87%
30 °F 81%
20 °F 74%
Freezing points of
battery Electrolyte
Electrolyte
Temperature
Specific
Gravity
32 °F 1.000
25 °F 1.050
18 °F 1.100
14 °F 1.125
5 °F 1.150
-4 °F 1.175
-15 °F 1.200
-23 °F 1.210
-33 °F 1.220
-42 °F 1.230

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Model #
12 Volts
Rated
A/H
(20 hr)
Usable
A/H
(20 hr)
Rated
Watt/hrs
(20 hr)
Usable
Watt/hrs
(20 hr)
*Min.
Charging
System
*Max.
Charging
System
L x W x H
in Inches
Approx
Weight
in Lbs.
Short Circuit
Ratings in Amps
@ 104°F
Rated
A/H
(6 hr)
SO-6-85-17/12 845 676 10,140 8,112 68 amps 136 amps 40 x 7.75 x 25 742 9,600 680
SO-6-85-19/12 950 760 11,400 9,120 76.5 amps 153 amps 40 x 8.55 x 25 808 10,800765
SO-6-85-21/12 1055 844 12,660 10,128 85 amps 170 amps 40 x 8.75 x 25 880 12,000850
SO-6-85-23/12 1160 928 13,920 11,136 93.5 amps 187 amps 40 x 9.00 x 25 959 13,300935
SO-6-85-25/12 1270 1016 15,240 12,192 102 amps 204 amps 40 x 10.25 x 25 1036 14,4001020
SO-6-85-27/12 1375 1100 16,500 13,200 110.5 amps 221 amps 40 x 11.25 x 25 1102 15,6001105
SO-6-85-31/12 1585 1268 19,020 15,216 127.5 amps 255 amps 40 x 12.75 x 25 1252 18,0001275
SO-6-85-33/12 1690 1352 20,280 16,224 136 amps 272 amps 40 x 13.5 x 25 1336 19,2001360
SO-6-100-33/12 1990 1600 1592 23,880 19,104 160 amps 320 amps 40 x 13.5 x 28 1550 22,600
SO-6-125-33/12 2490 2000 1992 29,880 23,904 200 amps 367 amps 40 x 13.5 x 33 1950 29,100
Model #
24 Volts
Rated
A/H
(20 hr)
Usable
A/H
(20 hr)
Rated
Watt/hrs
(20 hr)
Usable
Watt/hrs
(20 hr)
*Min.
Charging
System
*Max.
Charging
System
L x W x H in Inches
Depending on how configured
Approx
Weight
in Lbs.
Short Circuit
Ratings in Amps
@ 104°F
Rated
A/H
(6 hr)
SO-6-85-17/24 845 676 20,280 16,224 68 amps 136 amps 80 x 7.75 x 25 or 40 x 15.5 x25 1484 9,600 680
SO-6-85-19/24 950 760 22,800 18,240 76.5 amps 153 amps 80 x 8.25 x 25 or 40 x 16.5 x 25 1616 10,800765
SO-6-85-21/24 1055 844 25,320 20,256 85 amps 170 amps 80 x 8.75 x 25 or 40 x 17.5 x 25 1760 12,000850
SO-6-85-23/24 1160 928 27,840 22,272 93.5 amps 187 amps 80 x 9.00 x 25 or 40 x 18.00 x 25 1918 13,300935
SO-6-85-25/24 1270 1016 30,480 24,384 102 amps 204 amps 80 x 10.25 x 25 or 40 x 20.5 x 25 2072 14,4001020
SO-6-85-27/24 1375 1100 33,000 26,400 110.5 amps 221 amps 80 x 11.25 x 25 or 40 x 22.5 x 25 2204 15,6001105
SO-6-85-31/24 1585 1268 38,040 30,432 127.5 amps 255 amps 80 x 12.75 x 25 or 40 x 25.5 x 25 2504 18,0001275
SO-6-85-33/24 1690 1352 40,560 32,448 136 amps 272 amps 80 x 13.5 x 25 or 40 x 27.0 x 25 2672 19,2001360
SO-6-100-33/24 1990 1600 1592 47,760 38,208 160 amps 320 amps 80 x 13.5 x 28 or 40 x 27.0 x 28 3100 22,600
SO-6-125-33/24 2490 2000 1992 59,760 47,808 200 amps 367 amps 80 x 13.5 x 33 or 40 x 27 x 33 3900 29,100
Solar-One Specifications
* The Charging System is the sum of all charging sources including, but not limited to: Solar, Wind, Hydro generator, Inverter/
Charger, DC generator, or stand alone battery charger.
Model #
48 Volts
Rated
A/H
(20 hr)
Usable
A/H
(20 hr)
Rated
Watt/hrs
(20 hr)
Usable
Watt/hrs
(20 hr)
*Min.
Charging
System
*Max.
Charging
System
L x W x H in Inches
Depending on how configured
Approx
Weight
in Lbs.
Short Circuit
Ratings in Amps
@ 104°F
Rated
A/H
(6 hr)
SO-6-85-17/48 845 676 40,560 32,448 68 amps 136 amps 160 x 7.75 x 25 or 80 x 15.5 x 25
Or 40 x 31 x 25
2968 9,600 680
SO-6-85-19/48 950 760 45,600 36,480 76 amps 153 amps 160 x 8.25 x 25 or 80 x 8.25 x 25
or 40 x 33 x 25
3232 10,800765
SO-6-85-21/48 1055 844 50,640 40,512 85 amps 170 amps 160 x 8.75 x 25 or 80 x 18.00 x 25
or 40 x 36.00 x 25
3520 12,000850
SO-6-85-23/48 1160 928 55,680 44,544 93 amps 187 amps 160 x 9.00 x 25 or 80 x 18.00 x 25
or 40 x 35.00 x 25
3836 13,300935
SO-6-85-25/48 1270 1016 60,960 48,768 102 amps 204 amps 160 x 10.25 x 25 or 80 x 20.5 x 25
or 40 x 41.0 x 25
4144 14,4001020
SO-6-85-27/48 1375 1100 66,000 52,800 110 amps 221 amps 160 x 11.25 x 25 or 80 x 22.5 x 25
or 40 x 45.0 x 25
4408 15,6001105
SO-6-85-31/48 1585 1268 76,080 60,864 127 amps 255 amps 160 x 12.75 x 25 or 80 x 25.5 x 25
or 40 x 51.0 x 25
5008 18,0001275
SO-6-85-33/48 1690 1352 81,120 64,896 136 amps 272 amps 160 x 13.5 x 25 or 80 x 27.0 x 25
or 40 x 54.0 x 25
5344 19,2001360
SO-6-100-33/48 1990 1600 1592 95,520 76,416 160 amps 320 amps 160 x 13.5 x 28 or 80 x 27.0 x 28
0r 40 x 54.0 x 28
6200 22,600
SO-6-125-33/48 2490 2000 1992 119,520 95,616 200 amps 367 amps 160 x 13.5 x 3 or 80 x 27 x 33
or 40 x 27 x 33
7800 29,100

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These recharge voltage settings are ball park settings that will work for most systems. Use the
lower values if cycling is shallow and/or infrequent, use the higher values if the cycling is mod-
erate to deep and frequent. If you find your specific gravity is not reaching 1.275-1.285 raise
the voltage settings by .1 volt increments until the specific gravity readings indicate a fully
charged battery. You can also increase the absorption time to correct low specific gravity. If the
battery uses an excessive amount of water or is overheating lower the settings by .1 volt
increments until the overcharge is removed.
12 volt 24 volt 48 volt
Bulk 14.4—14.8 28.8—29.6 57.6—59.2
Equalize 15.0—15.5 30.0—31.00 60—62
Float 13.50 27.0 54.0
Absorption time 2 hrs. 2 hrs. 2 hrs.
Equalize time 2 hrs. 2 hrs. 2 hrs.
Recharge Settings
Solar-One® Specifications
Warranty 10 Years 7 years free replacement 3 years prorated
Cycles To 80% DOD 2100 Over 10 Years
Battery Type Flooded Lead-Acid
Positive Plate Tetrafluoroethylene (Teflon®) /Lead Antimony
Positive Plate Thickness .031”
Post-to-Cover Seal Burned Post to Cover
Cell “Jar” Material Injection Molded Polypropylene
Cell Cover Material Polypropylene
Tray Material Epoxy Coated Steel
Intercell Connectors Lead-Plated Copper Rated @ 367 Amps
Specific Gravity @ 77°F 1.285-1.275 Fully Charged 1.160 80% Discharged
Maximum Temperature 105°F
Gallons of Electrolyte Per Cell 6-85-17=1.7 6-85-19=1.9 6-85-21=2.1 6-85-23=2.2 6-85-25=2.5
6-85-27=2.7 6-85-31=3.1 6-85-33=3.3 6-100-33=3.7 6-125-33=4.2
DOD 12 volts 24 volts 48 volts Specific Gravity
0% (Full Charged) 12.75 25.50 51.001.275-1.285
30% 12.36 24.72 49.44 1.236
50% (Half Discharged) 12.12 24.24 48.48 1.205
70% 11.88 23.76 47.52 1.181
80% (Considered Dead) 11.76 23.52 47.04 1.168
24 hr. Open Circuit Volts vs. Depth of Discharge (DOD)
The above values must be taken with no charge or discharge (Open Circuit) on the battery for a
minimum of 24 hours. The temperature must be at 77°F and you must use a very accurate Digi-
tal Multi Meter.