how many of these would i need for a 9000w solar kit using a consistent 2000w pull?

Assuming you intend to use an Inverter to convert 12V DC current provided by the batteries into 115V AC current, a 2000 Watt load would equate to about 16.7 Amps at 115v; this is roughly equal to 166 DC amps. To even pull that much current, you would likely need 6 to 8 of these batteries, at the bare minimum. Each hour that you plan on putting a full 2000 watt load on the batteries will require 166 amps; to preserve the longevity of your batteries, you should really only use about half of their rated capacity every cycle; so around 50 AH; so to run a load that large for ONE hour, you would need three of these batteries. Multiply three by X, where X is the number of hours you need to run the load for; that is the base number of these batteries you will need. You should also consider the cabling you will require to hook these batteries up, which for a load that large must be either 1/0 or 3/0 AWG. For such a large load, you would probably do better to buy some large 250 - 300+ amp hour flooded lead acid batteries in a quantity that would be appropriate.

How long would 100 watt Harbor Freight solar system take to charge this battery or two 100 Watts hook together?

You have to change the ah ( amp hours ) to know how long it would take. Battery 12 volt × 100 ah = 1200 watts ÷ 100 watts = 12hours. 1200w ÷ 200w = 6 hours. Everything depends on the battery that is so exhausted and the sun at that time. Todo depende de la bateria, que tan agotada esté y del sol en ese momento.

What is the recommended amperage to charge this battery? I have the minkota mk 210. Is 5 amps enough to charge this battery overnight. 8hrs?

up to 30 amps with a 12v agm charger . 50% DoD is 50 amp hours. Chargingin 50 Amp hours with 5 amps would take 13 hours. 10 amps 6.5 hours. Ah of battery needing charged/ amps of charger = x times 1.3= time

ASIN	B00S1RT58C
Amperage	100 Amps
Antenna Location	Scooter, Solar Devices, Wheelchair
Battery Capacity	100 Amp Hours
Battery Cell Composition	Sealed Lead Acid
Battery Cell Type	Sealed Lead Acid
Battery Weight	60 Pounds
Best Sellers Rank	#250,282 in Health & Household ( See Top 100 in Health & Household ) #802 in 12V Batteries
Brand	UPG
Compatible Phone Models	No Phone Models
Customer Reviews	4.3 out of 5 stars 2,021 Reviews
Item Dimensions	12.17 x 6.61 x 9.16 inches
Item Type Name	12 Volt 100Ah Battery for Solar UB121000 45978
Item Weight	60 Pounds
Manufacturer	UPG
Model Name	UB121000 45978
Model Number	UB121000
Number of Batteries	1 12V batteries required.
Recommended Uses For Product	Scooter, Solar Devices, Wheelchair
Reusability	Rechargeable
UPC	656727248661 082045982381 014891964877 014891964884 656727481518 656727229387 082045982954 082045982527 082045982558 804879255345 730052516364 656727481334 656727228168 082045982473 656727228236 656727395327
Unit Count	1.0 Count
Voltage	12 Volts
Warranty Description	1 Year Manufacturers Warranty

Universal Power Group UB121000 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V

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