EPEVER 30A MPPT Solar Charge Controller Tracer A 3210AN Set up

RMK,

Welcome to the forum.

I am guessing that these are Flooded Cell Lead Acid batteries? As always, start with the Mfg. specifications, start there.

Boost Duration (minutes)

180

Sort of depends on how deeply discharged your battery bank is... 2-6 hours (in winter, the sun will usually go down before timing out). Get a good quality hydrometer and measure the specific gravity of the cells as you charge and equalize. This will tell you how well you are charging your battery bank.

Temp.Compensation Coefficient

-3

Is this -3 mVolt per degree C per Cell? Typically it is -5 mVolt for flooded cell lead acid.

Boost Charging Volts (v)

14.46

For flooded cell batteries, typically start with 14.75 volts or so (14.8 volts). Monitoring bubbling of battery bank and water usage + hydrometer readings will tell you how things are going... If you have to add water every 1 month or less, crank back on charging voltage. If you have to add water every 6 months or longer between watering, crank the voltage up.

Boost Reconnect Charge Volts (v)

13.2

You might want to crank that down to 12.6 volts or so... You do want to cycle the battery a bit... Not keep recharging it to 100% every day.

Low Voltage Disconnect Volts (v)

11.1

Suggest trying to raise that to 11.5 volts (depends on your loads). 11.5 to 12.0 volts under some loading is closer to 50% discharge. You do not want to go below 50% SoC very often (for longer battery cycle life).

When you Equalize, watch the current and gassing... 5% rate of charge is usually enough (5% * 200 AH = 10 Amps EQ). Even 2.5% can work fine. You want the battery "fizzing", not a rolling boil (heavy gassing). Also watch battery temperature--Extended EQ times can overheat the batteries.

Your rate of charge with solar is roughly:

• 2 * 165 Watt panels * 0.77 panel+controller derating * 1/14.5 volts charging = 17.5 Amps

Pretty close to a typical 200 AH * 10% = 20 amp rate of charge for "golf cart" batteries.

One other question, Your MPPT controller should have a Vpanel maximum input voltage of 100 VDC.

For your MPPT Controller, you would generally put your two solar panels in series for Vmp-array~36 volts. For several reasons, this is usually the better configuration for MPPT type charge controllers.

Good luck,
-Bill