I was in Santiago late Aug early Sep in the thickest parts of " los apagones" and I gotta tell you the energy roulette is enough to drive you bananas.My wife and I were air bnb'ing and we were in a newer modern apt. with an ups system that of course wasn't ample enough for a/c. but tv, lights, fans and wifi were always on so we managed.As someone who has family in both Puerto Rico and Florida I have helped put together a hurricane preparedness plan (electrically ) that I think may be of use here.
https://www.amazon.com/JKLcom-Emerg...4059&sprefix=rechargeable+LED,aps,181&sr=8-10
These bulbs have proven to be little life savers I think they serve a dual purpose here.1st and foremost; emergency lighting.The battery takes over once power is out. Lumens are comparable to a 40 watt incandescent (per manufacturer )
and 2ndly by simply turning off your inverter it can give your inverter batteries a much needed break.30 bucks for 4 bulbs seems reasonable for such convenience.if you don't need 4 bulbs depot has singles as well as target feit electric and GE respectively.
https://www.amazon.com/Inkbird-Temp...id=1569777085&sprefix=ink+bird,aps,180&sr=8-1
Stepping up price wise this little gem is quite useful the only caveat here is you have to either use your small chest freezer or go out and get your hands on one.what this is going to accomplish is one of the most efficient refrigerators you could ever own.By taking advantage of a freezer's higher insulation rating you won't be cycling your compressor on and off
as much as a standard fridge.Also typical fridge runs in the neighborhood of 700 watts whereas a small chest freezer at 100 or even less.Third and possibly most important is the theory behind upright refrigeration, since cold settles and heat rises when you open the door you don't spill out your cold air like as in a normal fridge (think supermarket: milk, eggs butter etc.most of those fridges nowadays don't even have doors )
https://www.altestore.com/store/deep-cycle-batteries/lithium-batteries-c4441/
Now this is a big ticket item huge to be honest.But without getting too technical, it is a far superior battery than your average flooded battery. half the weight, an expected cycle life of 5000 charges, dod ( depth of discharge ) rating of 100%,but most important imho is no release of flammable fumes while charging.These along with other battery chemistries are what's helping turn the tide on renewable energy.
And of course the heart of your ups systems "el inversor" I won't be suggesting any one in particular but I will stress what I think is a no brainer, the pure sine wave types. With all of our fancy doodads and electronics your typical square wave inverter is murder on these prima donna electronics of today,it's what's know in the biz as dirty power it would be like water hammering in radiator it will knock your fancy gizmos for a loop eventually.There are what's known as h-bridge transformer inversores which are slightly better but still not a pure sine wave like what's available from utility.
https://www.homedepot.com/p/GE-100-...ency-Power-Transfer-Switch-TC10323R/100171587
And finally this safety device that I would hope one day is implemented all throughout RD.Solar standards throughout the world have made it to where your grid tied system doesn't generate when there is an outage,it is a safety measure that keeps your solar system from back feeding to the grid therefor supplying energy to the system in reverse potentially energizing the utility lines that crews may be working on.Sadly I have seen way too many systems installed without any type of transfer equipment.I know that the likelihood of their being lineman working on the lines when one has 4 to 5 outages daily or the Utility simply not generating, but you never can be too safe.
So I'll leave you guys with this, there are some very good and knowledgeable electricians in the DR and I think it will be in your best interest to hire someone who has experience in the field. And as we know especially in the DR confident does not mean competent!