Minor tech problem is a goof that I made on install, so that would normally be a warranty thing. Tuning is also typically part of set up and commissioning, but this system is in Mexico ...
I've got some really valuable skills and I'll have cold beer.
Thanks for the info. I would put myself on the "willing to give it a try" side of the installation spectrum, but electricity here is pretty cheap and I spend more on natural gas 6 months of the year. It's more for if I need to plan my escape when I'm done working, and what locations might "fit the bill" with solar power and satellite internet.
I was on the board of a non-profit that leased a field to a company that put up solar 20 years ago, and since negotiating some of the terms (with no prior knowledge), I've always wondered about the ROI and improvements to the technology.
I've been meaning to post an update on my system. We are still tuning and have a minor technical problem that will require another trip to fix. But with everything going as normal and renters in the house (with no concept of power saving or conservation), everything is working normally and we are right at 11% of our previous usage from the grid. April 16 (+/-) will be the end of the first full bill cycle. That will let me see how close my metering is to their metering. I also expect a visit from them to see why the usage is down 90%!. I still need to add some battery and am trying to figure out the best path for that project. There is also some operational tuning still to do, that I think I can easily get another 5% or so wrung out of the system. If I get more battery there would basically be no need for the grid connection except for a backup if something failed. There is a monthly connection fee, so that will eventually factor in.
A week ago, they took most of the town offline for a transformer upgrade to fix some summer time load issues they have been having. Our place didn't even notice. Ice, cold beer and streaming music - all critical services were 100%.
A friend of mine here in town is a tinkerer and started installing solar 10 or 12 years ago. He's down to about 5% from the City now, net, sells his overage to the grid. Pays the connection fee for the same reason as you. The city is part of a consortium of city-owned power grids that's managed by a board appointed by the various city councils but operates independentlyâand now that board is proposing to go to a sell all/buy all policy, where all power generated must be sold to the grid at wholesale and bought at retail. So that would push the solar savings down from 95% to maybe 35%. So of course my friend told the city he'd just buy a generator to cover the few times when demand spikes, and get off the grid. Of course there's a law on the books that says all houses in town must be on the grid so he's pretty sure that if it comes to that, he'll fight.
That's very cool (pun intended on behalf of the beer).
My question... for the average gringo, given a 5 or 6 year ROI, the potential of problems (I assume - especially if you're renting), and the need for tweaking that you're able to do... is it worth the complexity for the "unwashed"?
Operational tuning, addition battery capacity... you're doing those things is easy (for you). Would others know to do it, and would my ROI be longer given my lack of knowledge?
"Minor technical problem" for you feels like code for a $250 service call for me. Thx
Minor tech problem is a goof that I made on install, so that would normally be a warranty thing. Tuning is also typically part of set up and commissioning, but this system is in Mexico and I was putting it together on our winter excursion, so lucky to get it online with a week for testing while we were there. This is a kit I'm very familiar with (we're a dealer), so this is sort of second nature and I set it up with all the toys so I can do remote management.
ROI really depends on your cost of energy and what you are factoring in. Electricity is expensive where this is installed, and we were on the top tier of the tariff system (pool pump that runs all day really makes an impact, plus AC in the summer months). So ROI was pretty easy to get - especially considering I get the gear cheap and did most of the install myself. It still cost me ~ $14K, but our power bills were $4K a year. Anyone else doing this install would be closer to 25-30K$, so that looks more like a 10 year ROI. It's still worth it, but you have to consider things like ongoing power when there is a power outage, what future power rates might be and all those kinds of subjective things. Also consider that more people going to solar lessens the demand on the grid, which should make future power increases less.
TLDR: if you like tinkering and are willing to learn and put some of your time into it, 5 year ROI is really doable unless your electricity is super cheap. If you want to write a check to the installer an not worry about it, you are probably closer to 10+ years for an ROI.
If you just want a warm fuzzy feeling, it's easier to just write the check to Greenpeace or something like that. But in the coming days of Mad Max, I've got some really valuable skills and I'll have cold beer.
I've been meaning to post an update on my system. We are still tuning and have a minor technical problem that will require another trip to fix. But with everything going as normal and renters in the house (with no concept of power saving or conservation), everything is working normally and we are right at 11% of our previous usage from the grid. April 16 (+/-) will be the end of the first full bill cycle. That will let me see how close my metering is to their metering. I also expect a visit from them to see why the usage is down 90%!. I still need to add some battery and am trying to figure out the best path for that project. There is also some operational tuning still to do, that I think I can easily get another 5% or so wrung out of the system. If I get more battery there would basically be no need for the grid connection except for a backup if something failed. There is a monthly connection fee, so that will eventually factor in.
A week ago, they took most of the town offline for a transformer upgrade to fix some summer time load issues they have been having. Our place didn't even notice. Ice, cold beer and streaming music - all critical services were 100%.
That's very cool (pun intended on behalf of the beer).
My question... for the average gringo, given a 5 or 6 year ROI, the potential of problems (I assume - especially if you're renting), and the need for tweaking that you're able to do... is it worth the complexity for the "unwashed"?
Operational tuning, addition battery capacity... you're doing those things is easy (for you). Would others know to do it, and would my ROI be longer given my lack of knowledge?
"Minor technical problem" for you feels like code for a $250 service call for me. Thx
I've been meaning to post an update on my system. We are still tuning and have a minor technical problem that will require another trip to fix. But with everything going as normal and renters in the house (with no concept of power saving or conservation), everything is working normally and we are right at 11% of our previous usage from the grid. April 16 (+/-) will be the end of the first full bill cycle. That will let me see how close my metering is to their metering. I also expect a visit from them to see why the usage is down 90%!. I still need to add some battery and am trying to figure out the best path for that project. There is also some operational tuning still to do, that I think I can easily get another 5% or so wrung out of the system. If I get more battery there would basically be no need for the grid connection except for a backup if something failed. There is a monthly connection fee, so that will eventually factor in.
A week ago, they took most of the town offline for a transformer upgrade to fix some summer time load issues they have been having. Our place didn't even notice. Ice, cold beer and streaming music - all critical services were 100%.
I like it! Minimal impact and cheaper. The wind farm project off the coast of New Jersey recently got cancelled. Interest rates and supply chain issues are the main culprit.
How's your water supply, Islander? I like our evaporative cooler for the house except on rare humid days. Well, except that it died and needs to be replaced. It's one of the main reasons we get by with a 1.5 kW solar system and haven't paid an electric bill in about 10 years.
It depends. We are working on getting municipal water, but it's not here yet. We have an ejido (this is community well water) hookup, but it is pretty seasonal (and needs to be pre-filtered). Otherwise we use water trucks. The trucks are easy to get, and the system works well enough (we have a 10,000 liter cistern), but the cost has gone up and is pretty variable. I've looked into condensors - the environmentals are pretty good here and we have spare power now, but the yield isn't really enough for a whole house supply, and they are spendy.
How's your water supply, Islander? I like our evaporative cooler for the house except on rare humid days. Well, except that it died and needs to be replaced. It's one of the main reasons we get by with a 1.5 kW solar system and haven't paid an electric bill in about 10 years.
This must be very exciting for you getting off the grid. Keep us updated on how it's going. Enjoy that cup of coffee
well it was pretty late when we energized it. But we did get some input:
Red is consumption, yellow is solar yield. The pool pump shut down just before 5, so that let the yield be enough to put a few amps back into the batteries. Plenty still to make the overnight, so we'll just let it ride until tomorrow morning and see what it does.
So I've been working on/planning this for a while. Power at our southern outpost is sketchy at best and expensive. We have a pool pump that runs most of the day and sucks a lot of power. When there are storms the power goes out, when too many gringos turn on the AC in August, the power goes out, when the water truck hits the power line down the street.... the power goes out. Basically the power isn't really reliable. Generators are expensive and noisy, and I sell Victron (batteries,inverters,power equipment) gear for a living, so this just sort of make sense. Our ROI on this setup is going to be about 2 years, but I got some deals and my labor is cheap when I'm the customer. Normally it would be closer to 5 years. But it also qualifies as emergency / standby power. I may eventually put a small generator on it for additional backup, but it doesn't really need it - the quattros have a second power input and internal transfer switch, so it's simple to do.
This is a pair of 5KVA Victron Quattros. They are set up to run split phase, so all of our 240V appliances will work. The middle bit there is an autotransformer - it balances the loads and let's the quattros work together in perfect balance. Lithium batteries are below, a pair of big solar controllers are on the right wall.
This is the solar array out back:
This is the solar array, it is just over 6.5KW. This is overamped a little bit for our setup, but that just lets it start making more power earlier in the day (and later too, and will be a little better when we get clouds and such). This is enough to run the pool pump and all the normal household stuff and charge up the batteries for overnight as well. You can even run the air conditioning on it to cool the place down. Right now we don't have enough battery to run air conditioning overnight, but that's a near future upgrade that just involves plugging in more batteries.
We can monitor and control most everything from afar, and it lets you do some really cool analysis and reporting.
Right now we are waiting for the final hookups. I should have sun power for coffee tomorrow morning.
This must be very exciting for you getting off the grid. Keep us updated on how it's going. Enjoy that cup of coffee
So I've been working on/planning this for a while. Power at our southern outpost is sketchy at best and expensive. We have a pool pump that runs most of the day and sucks a lot of power. When there are storms the power goes out, when too many gringos turn on the AC in August, the power goes out, when the water truck hits the power line down the street.... the power goes out. Basically the power isn't really reliable. Generators are expensive and noisy, and I sell Victron (batteries,inverters,power equipment) gear for a living, so this just sort of make sense. Our ROI on this setup is going to be about 2 years, but I got some deals and my labor is cheap when I'm the customer. Normally it would be closer to 5 years. But it also qualifies as emergency / standby power. I may eventually put a small generator on it for additional backup, but it doesn't really need it - the quattros have a second power input and internal transfer switch, so it's simple to do.
This is a pair of 5KVA Victron Quattros. They are set up to run split phase, so all of our 240V appliances will work. The middle bit there is an autotransformer - it balances the loads and let's the quattros work together in perfect balance. Lithium batteries are below, a pair of big solar controllers are on the right wall.
This is the solar array out back:
This is the solar array, it is just over 6.5KW. This is overamped a little bit for our setup, but that just lets it start making more power earlier in the day (and later too, and will be a little better when we get clouds and such). This is enough to run the pool pump and all the normal household stuff and charge up the batteries for overnight as well. You can even run the air conditioning on it to cool the place down. Right now we don't have enough battery to run air conditioning overnight, but that's a near future upgrade that just involves plugging in more batteries.
We can monitor and control most everything from afar, and it lets you do some really cool analysis and reporting.
Right now we are waiting for the final hookups. I should have sun power for coffee tomorrow morning.
Can't remember the last time I had a bow movement.
