Wow! 1,000 kWh @ month. Not a lot to some. A lot to me considering its use. Profitable I would hope. Well, thats none of business anyway.
1,000 kWh @ month or another way to look at would be - 33,333 watt hours in a 24 hour period! If the hours of equvilent full rated charge (from Photovotaic - PV) for your region where as high as 5 hours a day averaged over a year then it would take nothing less than a 6,667 watt PV array. At somewhere around $5.00 per watt not installed this would come to $33,335.00. What you are spending now is about $90.00 a month so at that rated it would take more than 30 years to pay for the PV modules.
To give you an idea for comparison. Here we use PV to provide electricity to 2 households, 5 people in all, and we consume on average over a year about 867 kWh per year and we live comfortably. Thats less than 1 - lighted billboard sign that one might see along our countries highways. Very seldom do we have to run a generator to supplement charge the battery bank. Typically in the winter months.
But hey! This is just my opinion on the matter, dont take it as the final word. I am at odds with the PV industry in general right now because of this so called "shortage" of raw stock (for making PV material) that seemed to happen almost overnight. It is responsible for the increase in cost of PV modules. The PV industry as well as its supporting electrical and electronic industries, even though they could be called Saints when compared to other industries, are not above reproach.
